Continuity And Component Tester

This continuity tester gives a beep sound if detect an electric current conduction between its probes. Here is the schematic diagram of this audible cable/component tester: Audible indication gives the benefit of “free eyes” compared to LED or other visual indication. Your eyes will normally have to keep watching on what is being tested,  no more eyes for watching any […]

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LM359 Fast Photodiode Amplifier

Photo-diode can be used for high speed digital transmission, but you have to provide high speed signal conditioner for that purpose. The amplifier circuit shown in the schematic diagram below satisfy the high-speed requirement. The circuit is based on current mode (Norton) operational amplifier, that’s why the response is faster than regular op-amp.  The frequency response of this circuit is […]

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