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Posts tagged Alarm Circuit

Simple Alarm Circuit using 12C509

alarm circuit diagrams Simple Alarm Circuit using 12C509, 2N7000, 78L05

Variable PC power supply Circuits

Variable PC Power Supply Circuits variable variable Power Supply Circuits Many alternatives abound where a HeNe laser power supply must be constructed from scratch. Decisions must be made based on the size or range of sizes of the HeNe tube(s) to be powered, convenience, need for portability (well in a relative sort of way), availability […]

CB RADIO or 80 METER HAM RADIO circuit diagram

CB RADIO or 80 METER HAM RADIO circuit diagram using TR 2N2222, C460, C372,  C1162,  C1173,  C1226, D476,  D68, D67, C901

The Audio preamplifier with dual recording

The Audio preamplifier with dual recording using IC BA3420AL. The Audio preamplifier with dual recording using IC BA3420AL. It has an internal switch for switching between playback head, mic and radio input modes, and also includes a bias oscillator and regulated voltage source for radio use. All control is possible with one external switch, allowing […]

Home theater surround sound Schema diagrram

Home theater surround sound Schema diagrram using 4558 and c945 Home Theatre Audio Project – Design and Layout

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