This circuit is derived from a Siemens Application Note 1974. This circuit uses common components of today. The circuit is here as it is of high educational value. I have not tested it. You can ‘simulate and test’ or ‘wire it up and try’ and let me know how it worked. The Circuit is also a simple analog to digital converter. You can use optos in place of LEDs.
T1 and T2 make a differential amplifier. T3, T4 and T5 driving the LEDs are comparators. Now to learn more on how they work you have to study circuits at 4QD-TEC and search Educypedia for more. Some pspice ideas here and at 101Science.com.
Read More Source :http://schematics.blogspot.com/2005/07/voltage-level-indicator.html
Thank you.
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This entry was posted on Wednesday, March 26th, 2008 at 12:22 pm and is filed under meter.
