RC Model Toy Circuits

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IC 2 tones Siren
Single-channel remote control
Melody generator schematic
Field, Crystals and capacitance meters schematics
Dual 8051S Execute In Lock-Step
simple steps for making fm transmitter
Low Voltage Microphone Preamplifier Circuit
Bistable Multivibrator (Flip-Flop)
Bi-directional Control Of Motors And The H-Bridge
Twin-T Audio Sine Wave Oscillator
Controlling high-current circuits
Thermal electromagnetic circuit long delay over-current release