Alarm Circuits

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Infrared Interruption counter
PIC16F877A Astro Clock
Universal Video Interface Circuit
2N3055 and LM723 3-30 V/2.5 A Stabilized power supply
10 led VU Meter using LM3915
Inverse Heat Conduction
PC Board Layout for Motion Detector
Pulse Reading Logic Probe
Low voltage DC power charger circuit
A sequence of opening and closing the outlet circuit
Frequency crystal oscillator circuit diagram of 10kHz-150kHz
Level 555 a control circuit diagram
Simple and practical power SCR trigger circuit diagram