Questions tagged [dual-supply]
The dual-supply tag has no usage guidance.
16
questions with no upvoted or accepted answers
4
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Grounding issues when using multiple supplies
I have a few questions about how grounding on a PCB and to an enclosure should be done when using multiple supplies. I have read a number of similar questions/answers from multiple sources with the ...
- 141
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38
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A transistor latch in dual-supply
I need to build a few latches they are supplied from +rail and -rail.
When the latch is ON it should output strong +Vrail and -Vrail also (not through resistor).
A solution on picture comes to my mind....
- 1,975
1
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1
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165
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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
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25
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Can I run a fuse block on different power supplies connected to the same terminals, depending on mobile vs. AC power availability?
I am wiring a trailer lighting system and I want to be able to run off AC power when parked at home, but run on a AGM deep cycle battery when AC power is not available. I've attached a drawing of the ...
- 11
1
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1
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123
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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 ...
- 111
0
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2
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88
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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
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46
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Can a common mode choke be used to filter a SMPS dual power supply?
I have a switched mode dual power supply with +12V, GND and -12V outputs. I'm seeing a lot of high frequency noise on the output of this power supply that I'd like to attempt to filter out. The noise ...
- 103
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59
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How can I sum the output of the two opamps and multiply the voltage swing to +2vcc and -vcc
I have a VtoI circuit that you can see in the figure below. According to this circuit, I can receive a maximum sin current of 4 mA with a maximum load of 5 kΩ. Considering that the supply voltage for ...
- 1
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54
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High negative voltage cut-off for op-amp from dual-rail power supply
In the picture I have a circuit that prevents reverse polarity and cuts the voltage with respect to the Zener diode (15 V) as a voltage reference for positive voltage output.
How do I apply the same ...
- 21
0
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25
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18650 battery concurrency
I would like to build a small circuit with a photoresistor and relevant ICs that switches a larger circuit that enlights Leds utilizing about 1A from a 18650 5V power bank of new batteries. How safe ...
- 59
0
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1
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128
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Unbalanced voltage accross full wave bridge rectifier
This an HiFi amplifier from end of 80's.
On the schematic below, I have asymmetrical voltages on the DC, +38 V and -40 V (on the leads of 1000 uF), instead +/-40 V, or +/-38 V - now this is also the ...
- 1
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35
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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
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53
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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
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111
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Changing dual supply to single supply for the following circuit
The following circuit has a +-15V supply. What will be the circuit modifications (only in the final stage the driver and the power amplifier) if I want to use a single voltage source with a ground ...
- 71
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85
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Calculation of Power consumption of opamp with positive and negative voltage
I used a single power supply for an op-amp, and I could see the current draw on the power supply. It was easy to determine power consumption using P = V * I.
How about dual power supply (+-9V); to ...
- 195