After I got into examining the sketches I discovered something quite interesting about the power transformer. In all previous designs that I had seen, there was a primary, a base feedback winding and several output windings. What Holt had contrived was a interesting method of assuring excellent coupling of the base winding by using a single strand of wire from a multi-filar bundle that was custom ordered from the wire factory. For example, I think that there was a bundle of 30 strands twisted together, which were all coated in red insulation and one strand of green insulation also twisted together in the bundle, which gave a precise turns ratio together with excellent coupling between the windings.
Make a robot friend with Adafruit’s CRICKIT – A Creative Robotics & Interactive Construction Kit. It’s an add-on to our popular Circuit Playground Express, FEATHER and other platforms to make and program robots with CircuitPython, MakeCode, and Arduino. Start controlling motors, servos, solenoids. You also get signal pins, capacitive touch sensors, a NeoPixel driver and amplified speaker output. It complements & extends your boards so you can still use all the goodies on the microcontroller, now you have a robotics playground as well.
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