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Extreme Speed Prop Planes Discuss the need for speed with fast prop planes (Screamin Demon, Diamond Dust, Shrikes or any REAL sound breakin'''' plane)

new speeder

Old 01-12-2023, 01:51 AM
  #101  
Clugh
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Der zuverlässige und effiziente Betrieb eines sensorlosen Antriebs hängt entscheidend von der korrekten Modellierung des Motors durch den Antriebsregler ab.In vielen praktischen Szenarien, insbesondere bei kostengünstigen Motoren mit geringer Leistung, sind die Parameter des Motors oft entweder mit einem großen Maß an Unsicherheit oder überhaupt nicht bekannt, abhängig von der Sorgfalt des Motorherstellers.In solchen Szenarien ist die automatische Motorparametermessung (auch bekannt als Motoridentifikation), die von Telega 3-basierten Antrieben durchgeführt werden kann, von unschätzbarem Wert.Für eine typische PMSM-Vektorsteuerungsanwendung sind die drei kritischsten Motorparameter der Phasenwiderstand, die Direkt-/Quadraturinduktivität und die magnetische Flussverknüpfung.Der Widerstand und die Flussverknüpfung sind zwar kritisch, aber relativ einfach automatisch zu messen, so dass sie vom Standpunkt der Antriebsabstimmung aus wenig interessant sind, während die Induktivität etwas verworren werden kann.In Telega wird die Motorinduktivität in zwei Schlüsselkomponenten verwendet: dem Motorzustandsschätzer und den Phasenstromreglern.Der Zustandsschätzer modelliert den Motor unter Verwendung einer Variation des Standard-PMSM-Modells, hier wird es im DQ-Rahmen 4 (rotierender Rahmen) ausgedrückt:Bei den Gleichungen ist zu beachten, dass der Einfluss der Induktivität auf das Verhalten des Motors proportional zum Strom bzw. dessen zeitlichem Gradienten ist.Der erste Beweis dafür, dass Ihre Induktivitätseinstellungen falsch sind, ist daher, dass der Antrieb bei niedriger Last stabil ist, aber Probleme (wie Abwürgen oder hohe Blindleistung) unter hoher Last aufweist, d.Hinweis: Die Stromsollwertrampe kann zur Bewältigung von Lastgradienten verwendet werden;der entsprechende Konfigurationsparameter ist m.current_ramp.Die zweite induktivitätskritische Komponente ist der Phasenstromregler.Abgesehen von bestimmten Details und speziellen Anforderungen wird der Stromvektor standardmäßig oft von einem einfachen sequentiellen PI-Regler gesteuert.Die Verstärkung des Controllers pro Achse kann angenähert werden als: Bandbreitenverhältnis (BWR) ist das Verhältnis derController-Bandbreite zu seiner Update-Frequenz (die der Tick-Frequenz der Motorsteuerung entspricht, die oft der PWM-Frequenz entspricht) [dimensionslos] sind der Widerstand und die Induktivität der entsprechenden Achse (d oder q). Der Standardwert von liegt oft bei etwa 0,06, je nachdemvon der Firmware-Revision und dem Typ des verwendeten AC-Modulators.Höhere Werte erhöhen die Reaktionsfähigkeit des Antriebs auf Last- und Drehzahländerungen, erhöhen aber auch das Risiko einer selbstinduzierten Oszillation zusammen mit dem Phasenrauschpegel.Niedrigere Werte erzeugen eine gleichmäßigere Phasenspannung und weniger Rauschen, erhöhen jedoch das Risiko, dass der Motor angesichts schneller Transienten stehen bleibt.Für die meisten praktischen Anwendungen Eine selbsterregte Schwingung im Phasenstrom-Regelkreis führt dazu, dass der Motor selbst bei Nulllast und/oder im Stillstand ein hohes Heulen erzeugt.Wenn dieser Effekt auch bei ungefähr beobachtet wird, könnte dies darauf hindeuten, dass die Induktivitätswerte, die zur Berechnung der Verstärkungen des Stromreglers verwendet wurden, falsch sind.Ein weiterer Beweis ist die Reduzierung des Bandbreitenverhältnisseslöst das Problem der Eigenschwingung, bewirkt aber gleichzeitig, dass der Motor unter Last und/oder bei schnellen Laständerungen stehen bleibt, während der Motor unter ~Nulllast in der Lage ist, ohne nennenswerte Probleme eine hohe Geschwindigkeit zu erreichen (siehe Zustandsgleichungen oben).Hinweis: Eine einfache empirische Methode zum Testen, ob der Phasenstrom-Regelkreis richtig abgestimmt ist, besteht darin, Telega so zu konfigurieren, dass der Motor im passiven Spinup-Modus (oder einem anderen Modus, der es dem Antrieb ermöglicht, im Stillstand und ohne Drehmoment zu arbeiten) mit aDrehmomentsollwert auf null stellen und dann den Motor von Hand vorwärts/rückwärts drehen, dabei schnell die Drehrichtung wechseln.Wenn die Schleife richtig eingestellt ist, sollten Sie keinen merklichen Widerstand gegen die Bewegung spüren und der Motor sollte keine signifikanten hörbaren Geräusche machen.Wenn Widerstand vorhanden ist, ist die Stromregelschleife überdämpft und der BWR sollte erhöht werden.Wenn der Motor ein hohes heulendes Geräusch macht, ist die Schleife selbstoszillierend, daher sollte der BWR reduziert werden.Nehmen wir an, dass basierend auf dem Obigen der begründete Verdacht besteht, dass die Induktivität falsch gemessen wird.In der Praxis ist eine falsch gemessene Induktivität wahrscheinlich größer als der tatsächliche Wert.In Ermangelung geeigneter Messwerkzeuge könnte man dieses Problem angehen, indem man die konfigurierte Induktivität (Parameter m.inductance_dq) systematisch reduziert, bis der stabile Betrieb erreicht ist, vorausgesetzt, dassLd≈LqEin effizienterer Ansatz ist jedoch die Verwendung eines LCR-Messgeräts zur Messung der Induktivität.

~Zubax~

Regards,
Hubert

Last edited by Clugh; 01-12-2023 at 02:07 AM.
Old 01-13-2023, 04:20 AM
  #102  
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Hi Micheal,
Load cell linkage is done. I don't really like it and already have a much stouter design in mind but it gets the idea across for now. When its finalized ill have this all done in Carbon fiber composite or T6. Now I have to draw up a flange that mounts the load cell to the x mount extrusion table it will all be mounted on. 3 M3 bolts wouldn't secure properly 20Kg in my mind so maybe I wont worry about it.. I just get concerned in reverse is hit with a load that sends the arm in a tensile direction versus compressive. Best to enclose it all still. It would have been better to build it where the entire link is the diameter of the load cell and hide the mounting bolts. The bottom half of the link would fast to the load cell but its in 2 pieces the the base has a big male cog the top half of the linkage accepts. Then from the top view one bolt runs down thru the middle of the entire linkage assembly and holds it together. In T6 or carbon fiber that will be very strong. The holistic linkage rod would be 25 mm in diameter. Ill also narrow the slot just wide enough to fit the arm and bearing flanges and 2 shims inside the channel. Heavy duty use needs more meat in the area of the 16mm bearing bosses. If you or your friends have ideas feel free to share them. Ralph is at the forge so Ill print it.

Regards,
Hubert

Last edited by Clugh; 01-13-2023 at 04:27 AM.
Old 01-13-2023, 04:57 AM
  #103  
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Nice too is the fact the subject generators cogging torque can also be measured as simple as turning the shaft here so all the BS from Ralph is over and there wont be anything to say....



Regards,
Hubert
Old 01-13-2023, 01:57 PM
  #104  
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My choice for a traditional cut 12N14P machines to rewind. Lets see how the Cobra 4130 compares to a 4225 Scorpion....This is the American black and gold.

This will be the "Black Karma Cobra".
Old 01-14-2023, 05:37 AM
  #105  
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"I don't really like it and already have a much stouter design in mind but it gets the idea across for now. When its finalized ill have this all done in Carbon fiber composite or T6. Now I have to draw up a flange that mounts the load cell to the x mount extrusion table it will all be mounted on. 3 M3 bolts wouldn't secure properly 20Kg in my mind so maybe I wont worry about it.. I just get concerned in reverse is hit with a load that sends the arm in a tensile direction versus compressive. Best to enclose it all still. It would have been better to build it where the entire link is the diameter of the load cell and hide the mounting bolts. The bottom half of the link would fast to the load cell but its in 2 pieces the the base has a big male cog the top half of the linkage accepts. Then from the top view one bolt runs down thru the middle of the entire linkage assembly and holds it together. In T6 or carbon fiber that will be very strong. The holistic linkage rod would be 25 mm in diameter. Ill also narrow the slot just wide enough to fit the arm and bearing flanges and 2 shims inside the channel. Heavy duty use needs more meat in the area of the 16mm bearing bosses. If you or your friends have ideas feel free to share them. Ralph is at the forge so Ill print it.
"
~Clugh~





And so I revised it. The flush 3mm mounting screws for the load are invisible when the piece is pressed in and bolted together with one boot through the center of the entire assembly. Its stout and the interference fit is nice and tight. The load cell mounts seamlessly to this before the assembly is pressed and bolted together with a 6mm cap head and recessed blind nut. When assembled it appears you just have a nice 30mm rod attached to the 20kg load cell.



Regards,
Hubert
Old 01-14-2023, 09:46 AM
  #106  
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Regards,
Hubert
Old 01-15-2023, 12:31 PM
  #107  
Clugh
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Default A torque cradle




A rotor shim for the 8mm shaft. It will be bored perpendicular to the axis and the roter bell set screw goes through it and engages the 8mm shaft.
That was easier that grinding a special shaft .



If the windings were in I could easily tell you the cogging torque right now.. Currently its the load generator. The prime mover motor mounts have to be printed..


Last edited by Clugh; 01-15-2023 at 12:45 PM.
Old 01-15-2023, 01:52 PM
  #108  
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Old 01-19-2023, 01:58 AM
  #109  
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Ralph 4225 Eta is 93% His super knocker is 95%
But so is this out the box for 8 dollars.

Poor Ralph this i, s much better than a Cots scorpion.
maybe he can explain it away...
Cobra 4130 20T delta
Kv300
Io .77 amps
Rm 45milliohm
396 grams


It has soo much room under the hood. It will be fun and we have real ways to measure it.

Regards
Hubert
Old 01-19-2023, 02:24 AM
  #110  
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He says no one is listening here so why is it that Scopion now post its phase INDUCTANCE. what other company does it?

For an A 4225 the measured the Motor Inductance (phase-phase) @ 1khz 10µH

These amateurs wont engage the question that even the manufacturers find relevant. This does not garnish guru status to not know better.

https://www.scorpionsystem.com/catal...es/A_4225_500/

Its is also a 5 turn delta its idle current at 15 Volts is1.54 amps. 9xs less than a power ditto hk4225 DD

What test do you need? The AC performance of those power ditto machines is obviously nothing stellar. Alot of reactive not real power. The PF is less than others im almost sure with such ac/dc imbalance.

All you need is a scope to see that forum mouths dont matter.

Someone whos test methodology is to test two motors head to head at different voltages has not a clue.

The real engineers at Scorpion must not share much with their autonomous winding machine

Despite dc resistance who would think increasing the idle current 9 times an improvement. Also the power report from dc ie current and voltage does not mean much it the current and voltage are so outta phase the power report is mostly reactive.



The harmonic content also has effect on the power factor which you see here is very poor at 64%. because the current and voltage are 50 degrees out of phase. he cant determine this in his plane or a static stand. He talks about test. Well then he should perform some real ones and he doesn't have to report a thing just post the waveform capture and two cursors!!!


Last edited by Clugh; 01-19-2023 at 02:30 AM.
Old 01-19-2023, 06:15 AM
  #111  
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Was auch gehen könnte ist höherer Fluß aber für kürzere Zeit.
Also mal testweise :
-
einen eher kleinen, bekannten Motor und überdimensionierten Regler nehmen.
- Schauen, wo der Motor in dieser Kombi bei geplanter Zellenzahl aus dem Tritt kommt
- doppelte Zellenzahl als geplant verwenden aber Last gleich lassen, bis halbgas öffnen und schauen, ob der Motor bei selbem Strom/Drehzahl aus dem Tritt kommt oder nicht..

Wenn man da eine Verbesserung sieht könnte man die Motoren für die Doppelte Drehzahl wickeln aber immer nur mit Halbgas fliegen (auf kosten des Stellers)

Die Taktik passt zumindest zu deinen Amperewindungen. Die Frage ist da nur, wie viel Drehmoment übrig bleibt und wie Lange der Steller das mitmacht..
Die Windung wird niederohmiger, aber das wird sicher durch die höheren Stellerverluste aufgefressen..

Viele Grüße,
Sebastian
No if hes so efficient with his inverter he should be able to do this.....

The APD 40F3 inverter burst current is 100 ampere. The Cobra is only rated at 60 amperes... and 44 amps continuous

When your efficient you can look at things like this. This small controller probably has a resistance as good or lower than a much larger YGE...

Good luck with sebastians ideas to compensate his deficiencies in an inverter. This motor and inverter package that can deliver nearly 2000 watts doesn't weigh 400 grams Just to idle ralphs 4225 motor with no load takes half the continuous duty of this dynamite minute inverter. Can you run it on that ???

The tribunus 80 is 90 grams and peaks only 20 more amps at 120 the APD 40F3 is 3 grams and peaks 100 with alot more features like PWM dithering.....

This is 2000 watt power package that immediately weighs 87 grams (3 ounces) less than what the scorpion needs. the tribunus is 140 dollars the APD is 45..... The scorpion is $299.00 the Cobra is $87.00




Last edited by Clugh; 01-19-2023 at 06:32 AM.
Old 01-19-2023, 08:08 PM
  #112  
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Hi Micheal
Christian send his regards to me about inertial flywheel testing of the motors.. You know this Im just being redundant.
"Hi 1BOHO,

yea, a wonderful idea to build a flywheel test bench. I used to do exactly the same thing when we used to race 1:12 RC cars. We used this to test the engines very quickly in limited classes before the race. Accelerate once and the whole diagram is generated. Like Associatet's Mike Reedy, we used magnetic pulse discharge through the motors to better magnetize the magnets and imprint a timing angle on the motors before the races. The engines had to be used unopened. Later I measured our brushed motors with flywheel mass test benches. I still have a brass disc with a diameter of 100 mm and a thickness of 14.85 mm for the flywheel. The disk alone weighed 980 g with the couplings and shaft + bearing then a total of 1000 g. These are super good measurements and, above all, you only need very little time for one pass. I've attached a picture of my flywheel. I also have a CFRP flywheel for very high-revving engines that weighs 500 g, but a friend of mine now has it and uses it to test aircraft fuel pump drives.
The XLX2 is there too. Will do some tests with it in the near future. I've had the Bluetooth link cable from the normal Mamba controller for a long time.
And yes, you're right, I'm back to normal, which I enjoy, no matter what the Kuperbieger troop tried, they didn't realize how important the electronic controllers are for brushless motors anyway. We used to learn this very easily with the brush motors and tuned and optimized the motors with the collectors. They didn't even know about electric flight, etc.
To messure amps i use LEM wandler that we adjust to higher amps load"

Happy Amps Christian

The Physics of calculations behind Christians wheels....

Detailed physics calculations:
• Inertia J = mass kg x (radius² m / 2) kg/m² (solid cylinder)
• Inertia J = mass kg x (radius inside² m + radius outside² m / 2) kg/m² (for a hollow cylinder)
• Angular velocity w = (rpm / 60) x 2 x pi rads/sec
• Erot = inertia x (w² / 2) Joules
• Delta Erot = (inertia x (second w² / 2)) – (inertia x (first w² / 2)) Joules
• Power kW = Delta Erot / time for that velocity change in sec / 1000
• Torque Nm = (Power Kw x 9549.305) / engine rpm
• Power in HP = Kw * 1.3410 & Torque in ft/lbs = Nm * 0.7376

Where is Ralph? He's silent. We thought he and Audiosmith were testing things?
We were hoping to learn from the true "gurus"
Regards,
Hubert

Last edited by Clugh; 01-19-2023 at 08:16 PM.
Old 01-19-2023, 09:32 PM
  #113  
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Old 01-20-2023, 08:40 AM
  #114  
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Last edited by Clugh; 01-20-2023 at 08:46 AM.
Old 01-21-2023, 07:53 PM
  #115  
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That is a totally sick looking airplane. You blink and it’s gone!
Old 01-22-2023, 10:52 AM
  #116  
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Hi Micheal,
This is a salvaged from dc motor for closed loop seat control; A Bosch trigger wheel. It has the magnets embedded at 120 degrees apart. This can mount externally on a shaft with a rotating bezel that allows the timing angle to be adjusted manually as well as from the inverter for closed loop operation with sensored inverters.

Regards,
Hubert

Last edited by Clugh; 01-22-2023 at 10:57 AM.
Old 01-26-2023, 10:09 AM
  #117  
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When do you plan on showing us your speedplane project...?

Last edited by combatpigg; 01-26-2023 at 10:13 AM.
Old 01-27-2023, 08:40 AM
  #118  
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Hi Micheal,

There seems to be alot of confusion about how the winds and inverters work on RC-networks.de. In the mean time I thought Id show you how easy it is to wind our LRK hybrid. I developed the wind and you may try it. You may not sell it. Its simple to do. When you wind deltas you always end up with 2 strands or two bundles, a start of one coil and the end of another, for the motor terminals UVW. That said its easy to assure a single wye never starves the dual delta and you have no solder points. You can also almost always assure the motor has a mostly filled bobbin. First wind 3 teeth at 120 degrees from one another all in the same direction anmd leave start and end leads long. Okay when you merge the starts and end of these coils you have the 3 coil deltas phase terminals that would normally feed to the inverters ABC (UVW). You take the two wires that make each phase terminal of the Delta and wrap them 1/2 the number of turns you did the delta. These are your open ended wyes which are essentially embedded load reactors for the inner delta. The two winding sets are also shifted 5α.





And so it looks deceptive as an 8 turn LRK but it is a 8 turn delta series wound to a 4 turn wye machine all in the same AWG.
Itz a 12 turn Y-Δ hybrid
Regards,
Hubert

Last edited by Clugh; 01-27-2023 at 11:19 AM.
Old 01-27-2023, 10:56 AM
  #119  
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The initial concept comes from the IEEE

Last edited by Clugh; 01-27-2023 at 11:20 AM.
Old 01-28-2023, 08:57 AM
  #120  
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When do you plan on showing us your speedplane project...?
Old 01-29-2023, 06:08 AM
  #121  
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Hi Michael ,
The load cell for torque arm measure came in.
The load cell for torque arm measure came in.
Old 01-30-2023, 04:32 AM
  #122  
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Christian sends his Regards"Hubert....And Ralph is at Plettenberg thread as he has no know how in electronics, 1 million years behind you."

Gruß
Christian Lucas

Last edited by Clugh; 01-30-2023 at 04:34 AM.
Old 01-30-2023, 04:54 AM
  #123  
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I did a ferrous 3dp wheel for a special Honeywell hall test.

And also a nicer looking tach trigger wheel.

Regards
Hubert

Last edited by Clugh; 01-30-2023 at 04:57 AM.
Old 01-31-2023, 12:36 PM
  #124  
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Hi Micheal,
This is the data acquisition system I chose because its open source and plug n play on all the senor calibration set up etc.

This is the way to test your motors true mechanical output then you will know you real efficiency and power and remove the Jurrasic bs from the equation .





SparkFun OpenLog Artemis is an open source data logger that comes preprogrammed to automatically log IMU, GPS, serial data, and various pressure, humidity, and distance sensors. All without writing a single line of code! OpenLog Artemis, or "OLA," automatically detects, configures, and logs Qwiic sensors. The OLA is specifically designed for users who just need to capture a lot of data to a CSV and get back to their larger project.

Included on every OpenLog Artemis is an IMU for built-in logging of triple-axis accelerometer, gyro, and magnetometer. Whereas the original 9DOF Razor used the old MPU-9250, the OpenLog Artemis uses the latest ICM-20948 from InvenSense capable of nearly 250Hz logging of all nine axes. Simply power up the OpenLog Artemis and all incoming serial data is automatically recorded to a log file with baud rates up to 500000bps [1], supported! The OLA also has four ADC channels available on the edge of the board. Voltages up to 2V can be logged with 14-bit precision up to 1900Hz for one channel and 1000Hz logging all four channels. Additionally, based on feedback from users we've added an on-board RTC so that all data can be time stamped.

The OpenLog Artemis is highly configurable over an easy to use serial interface. Simply plug in a USB-C cable and open a terminal at 115200bps. The logging output is automatically streamed to both the terminal and the microSD. Pressing any key will open the configuration menu.

The OpenLog Artemis automatically scans, detects, configures, and logs various Qwiic sensors plugged into the board (No soldering! No programming!). Currently, auto-detection is supported on the following Qwiic products:

Any u-Blox GPS Modules (Lat/Long, Altitude, Velocity, SIV, Time, Date) such as:
ZED-F9P 1cm High Precision GPS
NEO-M8P-2 2.5cm High Precision GPS
SAM-M8Q 1.5m 72 Channel GPS
ZOE-M8Q 1.5m Compact GPS
NEO-M9N 1.5m GPS
MAX-M10S 1.5m Ultra-Low Power GPS
MCP9600 Thermocouple Amplifier
NAU7802 Load Cell Amplifier
LPS25HB Barometric Pressure Sensor
BME280 Humidity and Barometric Pressure Sensor
MS5637 Barometric Pressure Sensor
MS5837 Depth and Pressure Sensor
SDP31 Differential Pressure Sensor
MS8607 Pressure Humidity Temperature Sensor
MPR0025PA MicroPressure Sensor
TMP117 High Precision Temperature Sensor
AHT20 Humidity and Temperature Sensor
SHTC3 Humidity and Temperature Sensor
CCS811 Air Quality Sensor
SGP30 Air Quality Sensor
SGP40 Air Quality (VOC Index) Sensor
SCD30 CO2 and Air Quality Sensor
SN-GCJA5 Particle Sensor
VEML6075 UV Sensor
VCNL4040 Proximity Sensor
VL53L1X LIDAR Distance Sensor
ADS122C04 ADC PT100 Sensor
Qwiic Mux allowing for the chaining of up to 64 unique buses!
MAX30101 Pulse Oximeter and Heart Rate Sensor
ISM330DHCX IMU
MMC5983MA Magnetometer
KX134 Accelerometer
ADS1015 ADC
This OpenLog uses common microSD cards to record clear text, comma separated files. You probably already have a microSD card laying around but if you need any additional units see the related items below. The OpenLog Artemis supports microSD cards formatted as FAT32 as well as the older FAT16 formats up to 32GB. The OpenLog Artemis can use any size microSD card and, as of firmware version 1.11, supports exFAT cards in addition to FAT32.

Very low power logging is supported. OpenLog Artemis can be configured to take readings at 500 times a second, or as slow as 1 reading every 24 hours. You choose! When there is more than 2 seconds between readings OLA will automatically power down itself and the sensors on the bus resulting in a sleep current of approximately 18uA. This means a normal 2Ah battery will enable logging for more than 4,000 days! OpenLog Artemis has built-in LiPo charging set at 450mA/hr.

New features are constantly being added so we’ve released an easy to use firmware upgrade tool. No need to install Arduino or a bunch of libraries, simply open the Artemis Firmware Upload GUI, load the latest OLA firmware, and add features to OpenLog Artemis as they come out!

The OLA can be tailored to many different applications and we will be releasing custom versions of the firmware which can be found on our Documents tab above.

The SparkFun Qwiic connect system is an ecosystem of I2C sensors, actuators, shields and cables that make prototyping faster and less prone to error. All Qwiic-enabled boards use a common 1mm pitch, 4-pin JST connector. This reduces the amount of required PCB space, and polarized connections mean you can’t hook it up wrong.

The SparkFun Qwiic Scale is a small breakout board for the NAU7802 that allows you to easily read load cells to accurately measure the weight of an object. By connecting the board to your microcontroller you will be able to read the changes in the resistance of a load cell and, with some calibration, you'll be able to get very accurate weight measurements. This can be handy for creating your own industrial scale, process control or simple presence detection. Utilizing our handy Qwiic system, no soldering is required to connect it to the rest of your system. However, we still have broken out 0.1"-spaced pins in case you prefer to use a breadboard.

By connecting a load cell to the Qwiic Scale you will be able to translate sensor data into something your microcontroller can read. The NAU7802 is an ADC with built in gain and I2C output to amplify and convert the readings from a standard load cell. A load cell is basically a device that translates pressure or force into electrical signals. In most cases this signal is very small and needs to be amplified. There are many popular chips that read the change and amplify it, but the NAU7802 goes one step further and converts everything to a true I2C output (attached to a Qwiic connector).

The board provides a four spring terminal to connect your load cell with no soldering required. In addition to the I2C pins, the board also breaks out an interrupt pin and AVDD to the edge of the board. The differential input signals (plus a second set of input signals) are broken out to the middle of the board, as well.

Note: The I2C address of the NAU7802 is 0x2A and is hardware defined. A multiplexer/Mux is required to communicate to multiple NAU7802 sensors on a single bus. If you need to use more than one NAU7802 sensor consider using the Qwiic Mux Breakout.


The NAU7802 Qwiic Scale can also be automatically detected, scanned, configured, and logged using the OpenLog Artemis datalogger system. No programming, soldering, or setup required!The SparkFun Qwiic Scale is a small breakout board for the NAU7802 that allows you to easily read load cells to accurately measure the weight of an object. By connecting the board to your microcontroller you will be able to read the changes in the resistance of a load cell and, with some calibration, you'll be able to get very accurate weight measurements. This can be handy for creating your own industrial scale, process control or simple presence detection. Utilizing our handy Qwiic system, no soldering is required to connect it to the rest of your system. However, we still have broken out 0.1"-spaced pins in case you prefer to use a breadboard.

By connecting a load cell to the Qwiic Scale you will be able to translate sensor data into something your microcontroller can read. The NAU7802 is an ADC with built in gain and I2C output to amplify and convert the readings from a standard load cell. A load cell is basically a device that translates pressure or force into electrical signals. In most cases this signal is very small and needs to be amplified. There are many popular chips that read the change and amplify it, but the NAU7802 goes one step further and converts everything to a true I2C output (attached to a Qwiic connector).

The board provides a four spring terminal to connect your load cell with no soldering required. In addition to the I2C pins, the board also breaks out an interrupt pin and AVDD to the edge of the board. The differential input signals (plus a second set of input signals) are broken out to the middle of the board, as well.

Note: The I2C address of the NAU7802 is 0x2A and is hardware defined. A multiplexer/Mux is required to communicate to multiple NAU7802 sensors on a single bus. If you need to use more than one NAU7802 sensor consider using the Qwiic Mux Breakout.
The SparkFun Qwiic connect system is an ecosystem of I2C sensors, actuators, shields and cables that make prototyping faster and less prone to error. All Qwiic-enabled boards use a common 1mm pitch, 4-pin JST connector. This reduces the amount of required PCB space, and polarized connections mean you can’t hook it up wrong.

The NAU7802 Qwiic Scale can also be automatically detected, scanned, configured, and logged using the OpenLog Artemis datalogger system. No programming, soldering, or setup required!

Last edited by Clugh; 01-31-2023 at 12:46 PM.
Old 01-31-2023, 12:48 PM
  #125  
Clugh
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Alll the sensors even the thermocouple amplifiers are plug n play

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