Circuit Learner
Junior Member level 1
I have a basic cheap china DC 72 volt to 12 volt 10 amp power supply. When I connect the 72 volts I get a large spark.
I want to use an On/OFF switch on the power supply.
I heard someone say if you use a very large value resistor, like a 10K resistor, you can keep that permanently connected to the positive input.
This 10K resistor will keep the caps and power supply powered so when you connect the main positive connection it will not spark.
I was thinking about using a on/off switch on the main positive input, and keeping a connected 10K resistor connected also to the input.
Will something like this work? What value resistor would I need? I would like a highest value so that it drains the battery the least in case of a short.
Thank you
In the picture, lets just say the connector is a switch on the positive side. The negative has no connector or switch on it.
I want to use an On/OFF switch on the power supply.
I heard someone say if you use a very large value resistor, like a 10K resistor, you can keep that permanently connected to the positive input.
This 10K resistor will keep the caps and power supply powered so when you connect the main positive connection it will not spark.
I was thinking about using a on/off switch on the main positive input, and keeping a connected 10K resistor connected also to the input.
Will something like this work? What value resistor would I need? I would like a highest value so that it drains the battery the least in case of a short.
Thank you
In the picture, lets just say the connector is a switch on the positive side. The negative has no connector or switch on it.
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