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12v Battery Charger Circuit with Auto Cut off

green90

Sep 1, 2015
6
Joined
Sep 1, 2015
Messages
6
1-what will be the voltage on( cv or pin 5)coz it internally connect to voltage divider


http://www.circuitsgallery.com/2013/04/automatic-battery-charger-controller.html
Working

  • Positive terminal of the upper comparator of 555 is connected with reference voltage in order to turn OFF the charger if the battery charges above 13.8V.
  • why they said Positive terminal ?????? i think ( cv or pin 5) is negative terminal
 

Arouse1973

Adam
Dec 18, 2013
5,177
Joined
Dec 18, 2013
Messages
5,177
Pin 5 is the inverting terminal of the 555s internal comparator. I think what they mean is that it's related (connected) to the TH pin which is the non inverting terminal of the comparator which just happens to be more positive than the CV pin.
Adam
 
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