741+2N3055 linear power supply 13.8V 20A
Tuesday, March 17th, 2009
This is circuit Linear Power Supply 13.8V 20A (High Current),
Use normal part ( IC LM741 an 2N3055) But it Work and Low Cost. Link
741+2N3055 linear power supply 13.8V 20A
Connection Tester using IC 741
Monday, November 3rd, 2008
This simple circuit uses a 741 op-amp in differential mode as a continuity tester. The voltage difference between the non-inverting and inverting inputs is amplified by the full open loop gain of the op-amp. Ignore the 470k and the 10k control for the moment, and look at the input of the op-amp. If the resistors [...]
Dark Activated Switch or Porch Light Switch with IC 741
Saturday, October 18th, 2008
The light sensor used is the ORP12 photocell. In bright light the resistance of the ORP12 can be as low as 80 ohm and at 50lux (darkness) the resistance increases to over 1 Mohm. The 1M control should provide a wide range for light intensities, if not its value may be increased. The op-amp senses [...]
