hi Brent
thought of making my own straps and got nichrome wire and stuff, but in the end just bought the dew not straps from agena astro on ebay for 25. works great.
for the controller, I dont think higher pwm frequencies are required, just a simple 555 variable square wave generator driving a mosfet for 1 to 2hz or so is more than adequate from my testing.
I made a 4 channel one with a single picaxe and 4 mosfets for less than 30.
I the strap around the objective for my st80
cheers
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