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1 vote
1 answer
165 views

Using MOSFET to switch dual power supply with common ground as a PWR/GND DPST switch for each power line

I have started a new project, an automatic firing system for fireworks, powered by 2 lead-acid batteries (12V). The batteries are connected in series with a common ground (GND), so the power ...
cristyan120's user avatar
1 vote
1 answer
47 views

Dual Power supply switching

I have two PCBs: PCB1 and PCB2. Both PCBs have a 5 V power supply connectors. Both PCBs are also connected with each other via extension connector. When 5 V connector of PCB1 is supplying power, then ...
Zunuran Nasrullah's user avatar
0 votes
2 answers
116 views

What MOSFETs should I use in this configuration?

Here is a configuration of MOSFETs which I believe allows for two different sources to supply power to the same load. This diagram was originally found here. The primary source is connected to the ...
Georgia088's user avatar
1 vote
1 answer
123 views

How to draw power from one of two sources according to priority, with indication for used source?

If two 5V power sources exist, one being always on and the other not (such as an ATX powersupply's standby 5V and "on" 5V rails), how could I draw power only from the "on" rail ...
John Schultz's user avatar
1 vote
3 answers
1k views

Switching between power sources part 2

So I'm trying to switch between two power sources, a 24 V battery and a 24 V power supply, I'd love to use the circuit mentioned in a another thread. Switching between two power sources I am having ...
TimWolf's user avatar
  • 13
3 votes
5 answers
2k views

How to increase the output current of a dual supply (virtual ground) circuit

I need to build a dual 5 volts power supply capable of 200mA output current. I've seen designs using TLE2426 and BUF634, but they cost too much for my project. Is it possible to use a simple OpAmp ...
Sohail's user avatar
  • 294