power supply

Hello, Im planning to do a very simple project but getting quite confused about where to start as I've done parts of it before but not brought everything together in one piece. Any advice on where to start would be great and I can expand my knowledge. Project Aims Simply put a box containing...

I'm posting today hoping for some guidance on a project i would like to attempt. I recently came into a lot of 64 12v 7AH Sealed Lead Acid batteries from a backup UPS. The batteries are still good and take a charge and load like normal for the most part. Since i only have the batteries and...

i have developed a small board that has a controller and a 16x2 display. I am powering up the board using external smps power supply. I want to add serge protection, so that my system will be protected from any time of serge or spikes. One option is i can use fuse but i want to know what else...

Hello everyone. I have seen many videos on YouTube where they built a capacitor based 220V AC to 12V DC power supply. But those were not sufficient for my project. I am eager to build a 12V 2A power supply where the input will be 220V 50 Hz using the following components: 105K 250V ceramic...

Hello, Thanks for your support in this forum. Currently, I am working on a project in which the operating voltage is 12v 1.5A to be given to the circuit. but, my input power supply varies from 12v to 24v of 2.5A. but I am not getting an idea that how to get constant voltage regulation of 12v...

Hello everyone! I was wondering, how can I understand what is the frequency input range that the KEPCO BOP 72-6m can amplify, when used in current mode, with a sinusoidal waveform as control input ? Should I referent to the BANDWIDTH (d-c to f-3dB) in the Datasheet? or to the LARGE SIGNAL...

If you are using several different DC voltages inside a unit, (say 5v, 12v, 48v) ignoring efficiency, would it be better to use separate AC/DC power supplies for each voltage or use 1 AC/DC power supply for the highest DC voltage and step down the voltage with DC/DC converters from there?

Hi. I'm pretty new to this stuff and theres a good chance something like this already exists but I just don't know the name of it. I have a big power supply capable of supplying a LOT of 12V DC current, and I'm looking for a way to control the output current using a PWM signal, but the output...

Hello! I am trying to wire up a small RGB LED system in my bedroom and would care for some advice on the best/safest/most efficient way to wire up the LED strips. I have four rolls of 5m long LED strips (see specs below) and I would like to lay them out as seen in the diagram attached (see...

Hello, I'm in the process of designing a PCB for a simple dual polarity unregulated power supply and I have a question regarding zones and traces. The PSU is designed to supply 4A and 40V on each of the two rails. There are two 10mF capacitors implemented to avoid ripple. So through each of the...

I built a simple, direct-coupled mains power supply. I wish to get on my load about 6V and 20mA DC. My mains is 220V AC. I used a 1uf 250V capacitor, a bridge, a resistor, and two 100uF tantalum capacitors. The 1uf /250V capacitor (NP) works well, and I got about 7VDC. However, I need a...

Hello, I need to design a linear regulated supply to power an dac output stage based on op amp. It must be a negative + ground + positive one. The problem I encounter is that I don't know wich topology to select between the first and second arrangement. I suppose that the first one induce a...

tl;dr - I'm a newbie in Ghana trying to troubleshoot the power supply board for my projector that died in a power surge. I have replaced visibly compromised capacitor, but need to test others. Where can I find resources on how to do this safely? Hi all - I'm an American living in Ghana and my...

Hi, I recently had a fault occurring whilst connecting my laptop to my mixing desk whilst having multiple new DMX fixtures connected to a USB interface. Whilst checking for faults I discovered a voltage of about 80-90V between the DMX port on the fixture and the Earth Connector. Knowing that the...

Dear community, I am interested in power management in medical devices and am doing research on ventilators. I have found through internet that most ventilators have an operating DC voltage of 12V or 24V. I also note that most medical AC/DC power supplies provide one of these four voltages...

Background I'm working on a seismic alert network and seismograph station at my school in Puerto Rico. We're building a solar system for the system to continue running during a potential seismic event. The system only consumes about 10 Watts, but with the satellite internet equipment it might go...

i have a power supply of 24 volts and the circuit consist 103aiw dual op amp till 14 volts the power supply output stays stable but further more it's starts fluctuating but when load connected the voltage become stable please help me to find out the reason why without load the op amp don't work...

Attached is picture of power supply board from HP Monitor (LA2405wg) when i power it on its power light blinks in green color, it gives a small splash of picture and some sound from power supply, then screen gets black, and it keeps happening When i googled, i came to know that these monitors...

Hello! I have a small home-use electronic device and the power supply cord has been damaged and no longer properly fits into the device. (the device works; the cord is just damaged) I want to avoid contacting the company and dealing with their customer support; I'm hoping someone here can give...

Hi all. I'm currently designing a circuit using a CYPD3177 USB Type C Controller to change the output voltage of a USB C power supply with power delivery support. I was looking at the example schematic in the datasheet to understand how the chip is used but I'm struggling to get my head around...