IC741 | Electronic Project Circuits

Posts Tagged ‘IC741’

Strength meter using IC741

This strength meter the test can by catch 2 metals. From that time squeeze meet. It will make LED stick bright arrange prevent according to one’s ability of squeezing the metal. The work of the circuit uses our body is formed lead the electricity changes to reach in the circuit. Which perform a temple resistance of the body. If we press wildly low resistance value make LED stick a lot of bright. By this circuit gives op-amp IC741 arrange each for other compare with voltage. In each the level of the intensity. We can stand the rapidity done to a turn VR1 and have LED Display 4 band. All in each band have IC741 detect voltage get and VR help fine the rapidity again the step. The detail is other , see in the circuit adds.

Be the first to comment - What do you think? Posted by admin - May 20, 2009 at 9:39 pm

Categories: LED Flasher, Meter Tags: Comparator circuit, IC741, led dispaly level meter

60 HZ not pass filter using IC 741

In sometimes when want to decrease especial frequency noise that want only. This circuit can help you , it does will not let 60HZ frequencies s can change. Then decrease the noise. By use the integrated circuit , 741 numbers highly popular , economize and don’t seek buy easy with , if , friends , want to filter especial which frequency the one frequency. As a result change the value RC see the detail has added in the circuit sir.

Be the first to comment - What do you think? Posted by admin - December 23, 2008 at 10:44 am

Categories: Op-amp circuit, Oscillator generator Tags: Bandpass Filter, IC741

Thermal Fan Controller by IC 741 and Diode

The controller uses one or more ordinary silicon diodes as a sensor, and uses a cheap opamp as the amplifier. I designed this circuit to use 12V computer fans, as these are now very easy to get cheaply. These fans typically draw about 200mA when running, so a small power transistor will be fine as the switch. I used a BD140 (1A, 6.5W), but almost anything you have to hand will work just as well.

Read more original source: http://sound.westhost.com/project42.htm