Questions tagged [dual-supply]
The dual-supply tag has no usage guidance.
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Can I directly do this type of switching in my inverter circuit?
So our project is based upon using a solar panel as the main source, but in case it fails, we need the circuit to automatically switch to the government supply which we'll be converting into 12V DC. ...
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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 ...
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Switching between batteries and a power supply
I have a powerful system (can use up to 20A in max load when using batteries) that can be either powered by batteries, or when possible, by another power supply with the same voltage, so it stops ...
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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 ...
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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....
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Powering LED's From Two Different Relays? (Complete Novice)
I am attempting to install auxiliary reverse lights in my vehicle and have come to the end of my useful knowledge.
I am confident I could simply install new LED's splicing a relay into the existing ...
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Bipolar 2s1p Li-ion array BMS and charging
For powering my portable circuit, I need a bipolar power supply of ±2.5 V. The circuit is low-power, but requires very precise power.
For its stabilization, I am using ADM7154 regulators for positive ...
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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 ...
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Single supply positive-only signal amplification using INA126 (two op-amp in-amp)
I need to amplify a 0.15-0.8 V very low frequency signal to the 0-10 V range of an ADC. I'm having a hard time figuring out why an INA126 does work as expected with dual supply but seems not to work ...
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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 ...
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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 ...
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Why is my 5 V water pump making my 7805 regulator fail?
I have a 12 V, 5 A dual power source with ground in the middle. A 7805 regulator with two 10 μF capacitors is connected to it, outputting 5 V.
I have a 5 V mini water pump connected to that 5 V line ...
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12v LED lights powered by 2 different circuits
I am wiring some automotive LED lights (underglow), and currently have them wired from the 12v ACC power (on when ignition is on), with a 5-pin illuminated on/off rocker switch on the dash. It works ...
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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 ...
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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 ...
