power supply

Please can you help me someone? I'm out of ideas. I am trying to make power supply for 12V 0.9A LED white chip dimming with ESP32S3 by 24V power supply. I use LM3404HVMA/NOPB. I progressed by this tutorial and change values by this calculator. So I have this schematic, but nothing happend. ESP...

Hi Experts, I've got 12V, 20A, 240W SMPS (AC to DC) Power supply, & I've attached single(1) Peltier Module (TEC- 12706) - 12V, 6A(Max) with that SMPS But when I gave power to Peltier Module without Heat Sink via SMPS (Power Supply), it works for few seconds & then it stopped (Heating &...

What are the advantages of using a flyback converter in the power supply systems? What are the complications that designer usually faces when flyback converter is used? How is GaN based flyback converters different? Regards, Srihari Rao M

Hi, I am trying to replace a battery powered circuit with a AC to DC adaptor circuit. I have a 5V adaptor but the device requirement is 1.5V. So, what is best way to reduce this voltage? Is using a resistor good enough? If so can you help me in understanding how to choose the value of resistor...

Hello, We need to calibrate a 12000W Xantrex Power Supply XDC 80-150, but the manual we have doesn't have the addendum which details this procedure. Am looking for folks who might have access to it or point us in the right direction. Best, MML

Hi Guys and Gals, How do I attach TO-3 ICs like this one to a prototyping board or pc board and add a heat sink? One of the 3 IC leads is attached to the metal top: Thanks in Advance

I'm looking into this (attached) schematic for a bass amp. I'm not sure, why the low voltage supply (+-16V) has his own transformer windings, regulators etc. but then it's connected to the hugh voltage rail? (I've circled in red) Thanks

Any idea what could be the issue or wrong with it?

Hi, this is my first post so, please advise if something is wrong. I have 4 x 300W power supplies to wire up to 4 dev boards to drive some speakers. my plan is to run from one plug to function box then out to the 4 power supplies. They are 24V 12.5A output. Each power supply goes to one dev...

Hi! I am building a device for a national competition ("Unge forskere") That should be able to sterilize hands with nothing but electricity. For this project, I need a High-Voltage power supply, capable of delivering 12(or so)kV at 30-100khz. Therefore my head automatically went to the very...

Hello, First off, I'm a newbie. Not sure if what I'm looking for is doable, possible... I have 8 battery powered light fixtures. They come with 24v, 5a individual chargers. I would like to make a charger where I can charge all my (8) lights fixtures at once without the need of plugging 8...

Are power boards designed with circuit to help prevent electrocution? While testing the 240V power board (BN44-00807A) in my Samsung UA50JU6400 TV, I shocked myself. I was testing the voltage output to the LEDs with my meter and unfortunately touched the metal shaft at the end of the meter's...

Hello, I am new to stepper motors and am having a problem. I have a machine that operates in all three directions (X, Y and Z) and has motors. When I do linear movements (one after another) everything goes well I reach a fairly high speed and I am able to lift my load. However, when I want to...

I have a sensor node containing an MCU & radio running at 3.3 V and a sensor running at 5 V. What is the better approach for powering up the system (in terms of efficiency, stability, etc.) : 1. High Voltage Battery + Buck Converter or 2. Low Voltage Batttery +...

Hello everyone, I'm in a project right now and I was trying to test a device with the LDC105 method test. My actual power supply (Keysight E36104B) cannot perform the test because the slew rate can't be programmed. And I was looking for other supplies, but couldn't find anyone that reaches a...

I have two 24VDC, 1.54A latching solenoids. I connected them both in parallel with power supply (80V, 80A). But when i turn ON the power supply it immediately turn off. However, when i connect a single latching solenoid with power supply it works fine. Is it necessary to use two power supplies...

Hi all, you’re probably going to say this is a dumb idea, but please instead consider it a challenge... I’m trying to build a 12V power supply to use with RF projects. The catch is that I want to try to make it run off of usb-pd, from a usb-pd decoy board. I’m trying to get as clean of a power...

So, I'm replacing my head unit with a raspberry pi4 and a touch screen. I plan to have a switch for running it off the car battery without a key. and some type of warning system to say if the battery is getting too low to start the car. The car would supply 12V 15 A on accessorie and 10 A...

Hello all, I have a SMPS power supply based on the TNY276 PMIC, I did a "No-load input power consumption" test using DMM connected to AC line input to measure current values while varing the input voltage from 85VAC to 265VAC... I got the following results: Input Voltage (VAC) Input...

When I measured the input resistance of some 230V AC to 12V DC transformer based power adapters, I got around 400 ohms. Isn't this quite high for the resistance of the primary winding? I expected no more than 100 ohms. The adapters are low power though (output power< 10W). (Background story: I...