Stepper Motor Circuits

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alarm using PIC16F628-04
Pierce crystal oscillator
Sawtooth Converter
led lighting for 6v vehicles
simple low cost digital code lock
3 channel audio splitter
Timed Beepers
DIY Fisher 800b into a mic pre
TDA2030 active speaker audio systems with 60 watt output power
Apply a Pulse to a Speaker Using a Capacitor
Various Schematics and Diagrams
1936 Hoyland Machine
Multi-point control corridor lights circuit