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Tachometer Circuit with Single Transistor CIRCUIT (1N90)

2016-05-08 12:25  
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This article describes the Tachometer Circuit with Single Transistor CIRCUIT (1N90). The content is very simple, very helpful. Components in this article can help you understand better understanding of this article. For example, in this article, you can go to find and buy these components:1N90.

A schematic diagram of? simple tachometer circuit is shown below. Using only a single transistor as the active component, this tachometer would probably be the simplest one. The input of this circuit can be picked up from ignition pickup coil,? or other wiring that gives ignition wave-form. This tachometer circuit works for 0 to 6,000 rpm. R3 is used for calibrating the full scale meter reading, to get valid rpm. The zener diode D1 is used to stabilize the 12-V supply. Here is the schematic diagram of the circuit:

Single Transistor Auto Tachometer circuit schematic

 


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