High speed warning device

Posted on Jan 19, 2013

A1 amplifies and regulates the signal from the spark coil. A2 converts frequency to voltage so that its output is a voltage proportional to engine rpm. A3 compares the tachometer voltage with the reference voltage and turns on the output transistor at the set speed

High speed warning device
Click here to download the full size of the above Circuit.

Amplifier A4 is used to generate an audible tone whenever the set speed is exceeded.

Leave Comment

characters left:

New Circuits



Popular Circuits

USB powered LED
Voltage Regulators
2 channel audio mixer
low volt led flasher schematics
DC Voltage Regulator Circuit
The Sound Square
Morse Code Bicycle Safety Blinker
A four channel X/Y oscilloscope multiplexer
Boost has a frequency characteristic of automatic offset MAX630 power conversion
Cordless telephone voice processing circuit diagram