voltage regulator

Hello everyone, I am working on a small project using ATMEGA328 (AM for short).. I use a voltage regulator to power the AM and then one of the output pins of the AM is connected to an LED+ resistor and Ground. I power my AM using an L7805 voltage regulator and I noticed that when the ground in...

Hi All, This is probably a very easy question, but if I have a 3.7v lipo battery attached to a voltage regulator outputting 3v, and I have a 100nF filtering capacitor to filter out noise, should I put the capacitor before or after the voltage regulator. Also, would I just want the voltage...

I am designing a constant 5 volt output switching regulator that bucks 12 to 24 volts down to 5 volts while supporting 5 amps. It is used to boot up a Raspberry Pi with a 10 inch screen. At 12 volts, the Pi will boot up fine. At 24 volts, around halfway through the bootup, the regulator will...

Hi all, Im relatively new to PCB design and schematics, A new skill I'm learning at my company is to try to bring some components in-house. We currently have a PCB in place where just voltage regulates 5v from the wall plug and the standard 3.7v from the battery to the OEM but it does not do...

I have to use a 94V battery to power a 24V DC motor and looking for suggestions on a motor controller that will help with the buck converter aspect and in rush current of the motor? Im a student so still trying to learn the best way to do this and was told this may be the best approach? The...

Hello, I have an application whereby we are sending a 4-20mA signal to an engine controller (engine speed proportional to mA). The test rig has a requirement for throttle blips, which the legacy controller does via a 24V switched output. The new engine controller cannot accept a digital input...

Hello all, I have found this ceramic 0603 SMD component that is green in color (glossy green)! Usually, SMD caps are beige or brownish in color and resistors are black with markings on them but this one looks more like a regular SMD cap. What is this green ceramic component? is it a special...

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

Hey! I came across this circuit (see attached picture) which is used to create a -15V from a 15V rail then used as an input for a negative voltage regulator. I couldn't understand quite how the circuit works! Can someone explain this for me please? PS: the 2 diodes are in the same die, and i...

I'm designing a variable power source from 5V to 30V with 600mA. Input voltage is VIN = 36V. I tried the below circuit. VREF is given from microcontroller DAC. I tried using N-MOSFET, P-MOSFET, NPN, PNP (with modifications). I set a the output voltage as 20V. This circuit works fine with no...

Hi folks, I think what I have is a fairly simple question, yet I've spent so much time Googling, that I've completely lost track of what is what. I'm looking for an affordable voltage regulator to power an ESP32 from a number of AA or AAA batteries. I have bought a pair of these (Dutch...

Hi! After producing multiple different PCB designs of a board for controlling a stepper motor, I noticed something that I cannot explain. The boards are in general powered through 12 volts, then a voltage regulator brings the voltage from 12 to 5 V and another one from 5 to 3.3 V. Stepper...

hello everyone. i´m doing a voltage source and i want to get approximately 30V-500mA on Vout with the smallest ripple as possible. : i got a transformer 12 0 12 V and a 1000V 2A bridge rectifier and 4700uf 35V electrolytic capacitor. The thing is: after rectifying it it should give me 24 *...

I need to know if LM2596T-3.3 voltage regulator works with AC electricity. Datasheets doesn't specify the type of current.

Hello all, This is my first post so forgive me if I break any rules, I am trying to create a variable voltage power supply using an lm317 but am running into problems. For starters, it doesn't seem that I have a vref voltage, when probed I get 0 volts across input and adjust. My second problem...

Hello all, I'm trying to make a PCB for a LED-based lighting panel and I'm trying to wrap my head around the best way to layout the circuit. After a decent amount of scanning through the web, it seems like using voltage regulator(s) is a better way to go over the old LED array with resistors...

Hi all, I'm designing a circuit that needs to take 1.5V from two AAA cells in parallel and outputs 0.8V to a DPDT toggle switch (on-off-on) that connects the load to +0.8V, 0V, and -0.8V depending upon the switch position. The output current would ideally be able to reach up to 1.5A for safety...

An idea needed for a simple, automatic voltage regulator for 3V LED. The application is for an electric model train (HO) which operates on 0V - 16V DC power supply. Traditionally, these locomotives utilise a 12V micro lightbulb which changes brightness in line with voltage applied to track...

Hi! I copied the DC-AC circuit from here, or specifically speaking this image (I didn't used the diodes because I think they are useless in described configuration). However when I observe AC voltage using DMM, I get the following results: 1. 5W LED bulb with capacitor shows voltage 37.4V 2. 5W...

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...