I can't always have a caller handy and didn't want to use a "virtual" caller. So, I devised this little record/playback rig. I have maybe $35 in it and about 3 hours build time. I built the board from a kit, although pre-built boards are readily available. I recorded, in my voice, the 2015 Intermediate pattern sequence. After the "landing" prompt, hit the "next" button. This will let the sequence caller start with "take-off" the next flight. I will add a flashing LED to remind me to turn it off after use. Maybe some of you will find this useful. Gary.
http://www.vetco.net/catalog/product...ducts_id=15010
https://www.youtube.com/watch?v=_at-gsu1KeM