Frequency comparator has status output


Posted on Oct 23, 2012

The original application for the circuit in Figure 1 was to check the number of revolutions of an engine with only one LED as an indicator. The measurement of the number of revolutions usually involves sensors with a frequency output proportional to the number of revolutions. The circuit compares the frequency output of such a sensor with a lower and upper limit and gives a visual result, using one LED. If the frequency is below the lower limit, the LED remains unlit.






Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

headphone circuit
Hi-fi Audio Amplifier Circuit Design and implementation
an132
Three Hour Timer
Protection For Telephone Line
Nixie Clock Version 1
install-a-piezo-bridge
School Video conference Infrastructure
2G—10 Band Stereo Graphic Equaliser circuit diagram
AM radio intermediate frequency amplification and detection circuit



Top