Voltage Controlled Switch

  
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This is a little circuit that i designed that could be used for achargingcontroller or voltage limiter. Its very useful if you are thinking of maki. In the assembly of the circuit u can alter the circuit as you please. For instance ididn`tgo as exact as theschematic. Just follow the diagram belo. In the circuit that i build thatsnottotally the same
Voltage Controlled Switch - schematic

as the in the diagram, is suppose to turn on the led at 8V because i used a 5v and 3v zener. I. If turn the comparatorpositiveand negative leads around will have the reverseeffect. Imeaninstead of turning on at 8V it will turn off and any. This is a little circuit that i designed that could be used for achargingcontroller or voltage limiter. Its very useful if you are thinking of making a solarcharger. In the circuit that i build thatsnottotally the same as the in the diagram, is suppose to turn on the led at 8V because i used a 5v and 3v zener. I also used a two 9 Vbatteries which voltages differ. The circuit i suppose to turn the led on at 8 V and any voltage lower than it should go off. If turn the comparatorpositiveand negative leads around will have the reverseeffect. Imeaninstead of turning on at 8V it will turn off and any voltage thats lower than that it will be on. Sorry idon`thave a picture of that particular instance, but i will put in one any way. [ for decorative purposes] I did not understand which component you used and why the 5V supply Can`t we use a comparator that derives the required power from the charge capacitor Will you please explain so that it`ll be easy for me to make this circuit. Please help. Thank u for the reply. The problem is that the solar panel I am using only give 1. 5 V output. So I think may be I need to use some sort of amplifier because I can not use any external power supply. And...



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