Starting Electronics Needs Your Help!
It is that time of the year when we need to pay for web hosting and buy new components and equipment for new tutorials. You can help by making a donation. Contribute to this website by clicking the Donate button. The total will be updated once daily. (You may need to clear your browser cache to see the updates.)
Target Amount: $2000
Amount Raised: $1369
Top Donor: C.C. $100
Created on: 15 May 2013
A 741 op-amp is is configured as an oscillator in this circuit and used to flash an LED on and off. This is another easy circuit for beginners in electronics and can be built on an electronic breadboard.
The oscillator part of the circuit consists of 4 resistors, 1 capacitor and an LM741 op-amp IC. The fifth resistor (R5) is a current limiting resistor for the LED.
In the circuit diagram below, the circuit is powered from 9V. This circuit should be able to operate over a range of voltages from 5V to 12V.
The video below shows the circuit built on breadboard.
Can't see the video? View on YouTube →