I was discussing with Aki (theledart.com) his JT blinker, which uses a single winding coil, two transistors for the “JT” V booster, and two transistors in an astable multivibrator to blink the “JT”. He asked me to include the schematic. The first circuit boards that I had made from ExpressPCB.com used an astable multivibrator. I
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