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2 votes
2 answers
87 views

P-Channel MOSFET conducting when it should not be

I am breadboarding a circuit to verify that a particular circuit to switch between USB and battery power works as expected. Specifically the circuit shown at the link below that is intended to use USB ...
Sal's user avatar
  • 53
2 votes
3 answers
2k views

Power supply slow rise time and ringing

I have this Power Supply EA-PSI 9200-15T. My input voltage to a board is 28.8V. No load current is drawn from the power supply. With reference to the above diagram, if I connect the board to the ...
user avatar
0 votes
1 answer
3k views

Connecting a Volt Ammeter to the input and output of a power supply

I'm working on a mini adjustable power supply that can give me a steady max of 12 volts, 3A and be able to boost to 24V when needed. Therefore, to do so I'm using a MT3608 2A DC-DC Step Up Power ...
Max's user avatar
  • 567
-1 votes
2 answers
3k views

Adding an on/off switch to an USB charger [closed]

I was wondering if it is possible to wire an on/off switch into the cable of a wall-wart USB power charger as easily as it is to wire an on/off switch into a regular power cable? Or are there ...
chaoticslacker's user avatar
0 votes
2 answers
6k views

Latching switch turning back to off on power loss

I can't twist my head around the proper use of my latching switch problem. In detail, the latching (or maintained) switch should switch a 48V DC source power supply for a cisco router. The 48VDC power ...
user2901103's user avatar
7 votes
1 answer
22k views

switch between battery and usb power no microcontroller circuit

Following an earlier question about how to switch between battery and USB power, I would love to implement the TC2014 LDO as suggested by Russell McMahon. That way I could switch between 4AA ...
lode's user avatar
  • 379