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InPowered Battery Testers circuit

Auto Car Battery Testers circuit using LM3914

Make mixer and a mic pre amp used tr BC177 or BC558

Make mixer and a mic pre amp used tr BC177 or BC558 This is the schematics of a simple low cost mic mixer that can be assembled from the components in your junk box. This two channel mike mixer is designed for handling high impedance dynamic microphones. Transistor Q1 can be any general purpose pnp […]

Lm3886 Schema and Layout diagram

Lm3886 Schema and Layout diagram Parallel LM3886 Gainclone GC audio amplifier LM3886 amp circuit diagram. … as you can see from the below layout, basic as the manufacturer schema, DIY Parallel LM3886 Gainclone GC audio amplifier, Download LM3886 datasheet PDF, PCB board layout are here lm3886, Schematic Diagram 100W 2x LM3886 Audio Power Amplifier, LM3886 […]

HA13108 Schematic audio amplifier

HA13108 Schematic audio amplifier

Phone Broadcaster and Telephone Circuits

Here is a simple yet very useful circuit which can be used to eavesdrop on a telephone conversation. The circuit can also be used as a wireless telephone amplifier. One important feature of this circuit is that the circuit derives its power directly from the active telephone lines, and thus avoids use of any external […]

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