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Topic: HELP! battery charger circuit design (Read 958 times) previous topic - next topic

baligena

I have a circuit that is connect to a battery and a charger
See picture below.




What I need is when I disconnect the battery the charger is also disconnected from the circuit.  How can I do this?


dc42

Does the circuit include a voltage regulator? Or maybe it can handle a certain amount of overvoltage in some other way? What type of battery is it?

Depending on the answers to the previous questions, you may be able to detect that the battery is disconnected by detecting excessive voltage output from the charger, and use that to disconnect the circuit.
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baligena

Yes it does include a voltage regulator from the charger to the circuit.  However, is this only accomplished with an increase in voltage detection?

retrolefty

Quote
What I need is when I disconnect the battery the charger is also disconnected from the circuit.  How can I do this?


Perhaps a DPST switch, one pole for the battery and one pole for the charger?

Lefty

baligena

#4
Mar 16, 2013, 09:16 pm Last Edit: Mar 16, 2013, 09:28 pm by baligena Reason: 1
Quote

Perhaps a DPST switch, one pole for the battery and one pole for the charger?


What DPST switch (an image would help) can I use that once I remove the battery the power is cut off to the circuit.  I was thinking of a relay however it keeps latching which is not good.

retrolefty


Quote

Perhaps a DPST switch, one pole for the battery and one pole for the charger?


What DPST switch (an image would help) can I use that once I remove the battery the power is cut off to the circuit.  I was thinking of a relay however it keeps latching which is not good.


You mean like this?

http://www.kpsec.freeuk.com/symbols/swdpst.gif

http://images.wikia.com/guitarbuilding/images/6/6a/DPST_Switch.jpg

Lefty

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