I found an intriguing sketch for a "PAiA Fatman Frequency Multiplier Module" (see link) and thought I could put my 74HC4046A chip and all the flip flops I have laying around to good use by recreating it. Unfortunately, the sketch has me stumped right from the beginning: why is Vcc going to ground and the GND input of the chip to -12V? I understand that it will still work in principle since all voltages are being shifted down by 12V, just not why. Why not connect the usual way with Vcc at 12V and GND to 0V?
I should add I'm a novice with no experience with Fatman systems.
I should add I'm a novice with no experience with Fatman systems.
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