Circuit Project Electronic

Source : http://www.turbokeu.com

Detail :

I like to use the LM2941 regulator (about 5 Euro here in Belgium) instead of a cheap LM317 because of the low voltage drop over the regulator, typically 0.2-0.3V (max 0.5V at 1A) as opposed to the 1.5-2.5V dropout voltage of the LM317. With the 12 to 12.xV on a common PSU rail you get the full or almost the full 12V on your fans. The formulas for resistor calculation are the same as for a LM317, but the LM2941 has 5 pins as opposed to the 3 of the LM317 (the adjust pin is separate and a “ON/OFF” pin is also provided to remotely shutdown the regulator. The LM2941 is rated for 1A max. with some cooling. The values of R1, P1 and P2 in the schematic have been calculated for an output range from about 7 to 12V and a 10K linear potentiometer.

Read more in web http://www.turbokeu.com/myprojects/fanregvoltmon.htm

This entry was posted on Monday, July 30th, 2007 at 8:54 am and is filed under Power supply. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.