All Questions
Tagged with dual-supply power-supply
20
questions
4
votes
2
answers
487
views
How is it possible to supply an LM833D with +12V and -8V supply?
I was studying a Philips CDR-765 circuit when I came across an output driver circuit consisting of an LM833 opamp supplied with -8VDC on the 4th pin and +12VDC on the 8th pin.
This is the first time I ...
- 43
0
votes
2
answers
88
views
Dual power supply, AC to ±12V DC, based on LM7812 + LM7912
I'd like to build a power supply, based on the LM7812 and LM7912, that outputs both +12 V and -12 V. I found this circuit online:
According to the datasheets, the LM7812 has a typical dropout voltage ...
- 113
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 ...
- 11
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 ...
0
votes
2
answers
61
views
Dual supply circuit
I am designing a circuit with 2 48V power supplies to feed a load. My goal is to give priority to Supply 1 when available since I need the load to be fed by only one supply at a time. This is what I'...
- 25
0
votes
0
answers
35
views
Is this PSU configuration correct for dual power rails and a virtual ground?
I am pretty new to electronics, and I am just not understanding if I have the right configuration on my Tektronix PS2502g PSU. I am trying to supply voltage to a LM741 op-amp but do not appear to be ...
- 111
3
votes
2
answers
1k
views
Dual voltage power supply
I am working on my first power supply design for +12 V and -12 V output. The +12 V is working perfectly. The negative output at the rectifier is only -1.87 V.
I have checked the wiring, replaced some ...
- 33
1
vote
2
answers
291
views
Designing dual tracking regulator low noise PSU
I want to design a power supply with the following constraints
Inputs 19 V - 0 - 19 V secondary & 9.5 V secondary - A transformer I have
ready for the project, primary 230V
. Output +15 & -...
- 11
0
votes
0
answers
53
views
How to use multiple supply options in the easiest way for STM32?
I designed a custom board with STM32, ADC, and RS422 transceivers.
The estimated current consumption of all the IC on the circuit is not more than 200 mA on 3.3 V.
in the operational mode, the board ...
- 443
0
votes
3
answers
432
views
Confusion with dual power supply negative output current ratings
To summarize, I came up with the question when looking for an alternative to an expensive dual supply. This deflection system requires a +/-15V power supply, but its own supply is super expensive. I ...
- 1,505
-1
votes
1
answer
161
views
Using 12V output as ground in 24V power supply to form +/-12V rails
I have a power supply which outputs both +12V and +24V, Here's a photo:
Can I use the +12V as ground in my circuit to have a -12V(from 0V)/+12V(from 24V) output?
The load on the -12V output will be ~...
- 1
0
votes
2
answers
154
views
Low current, +- 20V supply from 5V [closed]
For my application I need +20V and -20V, at a low current, 10mA but probably 1mA might be good enough - difficult to say until I try.
I start with 5V provided by a common USB power supply. I have read ...
- 125
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 ...
- 13
3
votes
2
answers
2k
views
How to Wire Potentiometer Wiper
It appears as though the wipers are unwired in this schematic. Are only the far left and far right pins wired in this circuit?
- 45
1
vote
1
answer
85
views
Two power supplies, but the 5V one turns off the 3.3V one
Is it possible to have two power supplies, where one cuts off the other one? And if so, how?
I have a circuit which regulates a 16V supply to 3.3V and powers a microcontroller. However I would also ...
- 309