Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [dual-supply]

44 questions
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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 most definitive being Should chassis ground be…
Muzza
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3 answers

Seamless power source switching for a microcontroller (ATtiny85)

I'm seeking guidance on accomplishing seamless power source switching for a microcontroller (ATtiny85). My objective is to seamlessly transition power input between two distinct sources (Raspberry and Button cell). I am exploring various…
Anand
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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 components, and ran simulations on a few…
Josher
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4 answers

Output signal distortion from op-amp

I am currently using a TLE2144, and the input signal of 600 kHz, 4.5 Vpp is generated from a function generator. Using a voltage follower with TLE2144, I was able to get an output of 4.5 Vpp with an input from the function generator, but after it…
Sam Shurp
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2 answers

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?
David Graham
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Best way to get stable +-9 volts AND 5 volt from a 9V DC source

I'm quite new in electronics, but I'm not scared to try it (Look Mum No Computer). So please bear with me and tell how to improve my asking. I am building a guitar pedal. It's a op-amp based parallel effect loop with boost controls for each channel.…
Jesper Kragh
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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 circuit like this one (from here): Which uses a…
Sohail
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Converting AGC Schematic from Single Sided to Dual Sided Supply

I am working with the attached circuit, sourced from here: Original This circuit is designed for a single sided power supply and has worked very well for me in the past. For a new project, I would like to use it with a dual sided power supply,…
Telluride
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Op-amp dual supply methods

To power an op-amp with a dual supply (+Vcc and -Vcc) you can use two power supplies connected in series. I would like to find an alternative and less expensive way to do this as (in my project) the two power supplies would only power the op-amp…
philfs
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Dual batteries changeover circuit to avoid power loss

I have a similar question to the one here How to create automatic dual battery changeover/switching circuit for uninterruptible power?, but would prefer to use a mechanical switch (eg a rocker switch). The setup is this: I have two 12V batteries…
Aerodactylius
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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 proposed setup and am really just looking to know…
MistreJ83
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Do dual supply voltage buffers with dual outputs exist?

I need a dual voltage supply (+-15V) voltage buffer for my design. This component will receive a signal (varying from -10 to 10V) and transmit it with gain=1 (line driver, voltage buffer or voltage follower) to its output (at least +-10V output). I…
wertyu
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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 & -15 V, +5 V. Imax 350 mA on all rails. Parameters are low…
ahmod3
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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 when present, or else from the standby rail? Additionally, how can it be…
John Schultz
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Circuit with dual batteries used in sequence

I have a circuit that is currently powered by two 18650s connected in parallel via a TP4056 USB charging and protection module. The circuit uses very low power and therefore it lasts for weeks if not months. The load is a number of RGB LEDs with…
Gavin
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