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74HC74N flip-flop
🔹 ICs: XD74LS90 (decade counter) · XD74LS47 (BCD to 7-segment decoder) · XD74LS42 (BCD to decimal decoder)
🔹 Input: Potentiometer (variable analog voltage)
Discrete Class D Amplifier DIY Kit you know exactly where toThe Discrete Class D Amplifier DIY Kit is a complete, working audio power amplifier you build from fundamental building blocks with no dedicated amplifier chip anywhere on the board. A 555 timer generates a ~188 kHz carrier, an LM393 comparator turns your audio into pulse width modulated pulses, an IR2113 gate driver and a pair of IRLZ44N MOSFETs switch the power, and a simple LC filter reconstructs it all back into clean, amplified sound. Feed it any
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