Alarm Circuits

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Vehicle alarm
8 channel LCD Teperature meter ( RS232 - AT90S2313 )
Oscillator operates from one cell
Three-Decade 15Hz To 15Khz Wien-Bridge Oscillator
Buck boost converter circuit
the active power factor correction (PFC) of FAN4810 Circuit design
how to make automatic vehicle headlight
usb car charger
Capacitive proximity sensor detection circuit