Circuit Schematic Precise FM Tuning Indicator using The Op Amp IC CA3140

Radio. - This is electronic circuit schematic of Precise FM Tuning Indicator using The Op Amp IC CA3140 like in Figure 1 below. In this circuit schematic the basic component used is the Op Amp IC CA3140. 

In here we will give you global description about circuit schematic of Precise FM Tuning Indicator using The Op Amp IC CA3140 and then we will give you link to continue your reading from original source as external website.

Circuit Schematic

Component Part
  • Capacitor
  • Resistors
  • IC CA3140
  • LEDs
  • Variable Resistor
Description

Circuit schematic like in Figure 1 above is Circuit Schematic Precise FM Tuning Indicator using The Op Amp IC CA3140. Electroschematics site describe that this is an add on circuit to your FM radio for precise tuning of stations. Usually an LED indicator is provided in FM radio to see whether the station is tuned or not. But it is difficult to see the precise tuning points since the variation in the LED brightness cannot be detected easily. This circuit solves the problem.

The circuit uses the Op Amp IC CA3140 as a differential amplifier to sense the voltage level between the terminals of the tuning LED. The output of IC1 drives two LEDs one Red and one Green to indicate whether the station is precisely tuned or not. If both LEDs remain off, it indicates precise tuning. If anyone LED is on, it indicates that tuning is not precise. If both LEDs remain on, it indicates that there is no signal.

And now you can read more you knowledge about circuit schematic of Precise FM Tuning Indicator using The Op Amp IC CA3140 from the original source article using link [here].
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