USB Interface Circuits

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300HZ - 3KHZ Audio Filter
Pierce crystal oscillator
Air-Flow Sensing Thermistor Bridge
Period-To-Voltage Converter
Schematic Diagram 250mW 16-dB VHF amplifier circuit
battet back up circuit
Simple FM Transmitter circuit schematic Long range short range using VMR6512 Hi-Fi Audio FM transmitter module
Pulse Generator using Op-Amp
Spy Phone Bug Transmitter Circuit
Arduino Motion Detector Circuit
300 to 1500kW straight with a generator of Lightning