power

Hello everyone, I recently aquired a marshall Kilburn speaker on a retail website which said it was properly working. The issue is that it isn't, I asked the guy who sold it to me and he said he used it mainly on sector because the battery wasn't working (15-20 minutes autonomy instead of...

I am simulating a synchronous buck converter based on the LTC3703 in LTspice and I want to accurately measure the input power in steady-state. The input current drawn from the source is highly pulsed and includes large switching spikes , so instantaneous waveforms are not very intuitive. Thank you

Hi all, I'm designing a Power Distribution and Controller PCB for a Clock/LED Display frame and I'm looking for some guidance on the best combination of power supply and PCB layout. I've designed a PCB with 21 WS2815 LEDs and will have a 3D printed frame panel that will hold the boards in the...

0 I'm trying to solve the circuit shown in the attached image, where I need to determine the power of resistors R1 (4 Ω) and R2 (6 Ω). I’ve attempted to use mesh analysis, but the results don’t match, and I’m unsure if I’m setting up the equations correctly. This circuit includes multiple...

Car: 2019 Lexus IS350 Link for lights at bottom of page. Link for piggyback at bottom of page. Link for Fuse box diagram at bottom of page. I am currently trying to figure out how to power my 10 puddle lights that will go under the car. But the things is I want to have two power source. One...

Hello! I’ve been searching for a reliable transformer-less power supply circuit for quite some time now. After going through countless circuits on Google, I still can’t find any compact designs that seem trustworthy. Companies have been creating super compact and safe power supplies for...

Problem: I have a 10s 36V li-ion battery pack powering my load (resistor used as example). When the charger is connected I would like the load to be cutoff as well as charge the battery. In my current set up I have the load being cut off when the charger is connected through the pmos but the...

In my circuit (not relevant to the purpose of the question, but if you want I can post it) I have a PWM signal input to a gate driver, two external mosfets (HS and LS) and a load resistor (it's a classic half bridge configuration). I need to measure the efficiency of the system by doing...

Hello, I'm trying to design a power system for a desk robot. The idea is that it's kind of like a small roomba that organizes your desk before returning to a charging station. My battery (placed in the robot) is the Ovonic 1550mAh 100C 14.8V Lipo. I have 3 loads to power: 5-7V VIN to ESP32...

A 10-KVA single phase motor has a power factor of 0.8 lagging. A capacitor of 4 KVA rating is connected for power factor correction. Calculate the input apparent power in KVA taken from the mains and its power factor when the motor is on (a) Half load (b) Full load

Hello everyone, I’ve been working on a PCB design for my project, and I would appreciate any feedback or recommendations you can offer. The design includes: ESP32-C3 for control and communication SIM808 module for GPS and GPRS with SIM card support MLX90614 for temperature measurement...

Greetings, I have been doing some research into power cords and adapters that we might need for monitors bought in the US to be able to be used in Europe or Asia. We sell setups that include a monitor, and then those are shipped globally. The monitor's power brick are rated to be able to...

Hello everyone, I’m currently working on a project that involves using an NPK sensor that operates at 5V, along with an ESP module. For power, I’m planning to use an 18650 battery rated at 3.7V. I’m wondering about the best way to design the circuit to power for both the NPK sensor and the...

Dear Everybody! I developed a new vienna rectifier based PMG generator rectifier solution. My vienna rectifier input is connect to the PMG generator across the 3 boost inductor. I developed the control algorithm in matlab simulink, and I recognized that the PMG star point (N) and the vienna...

Hi, I bought a device that doesn't work, I hope you can help me fix it. The device is a Colloidal Silver Brewer. It has two alligator clips connecting to two silver wires, it is supposed to send electricity into the silver wires which are placed in water, and emit nano particles of silver...

I am pulsing a 38mH coil (16 AWG wire wrapped around a small tube) with a IRFB4115pbf MOSFET at 66.6v (3 lipo 5200mAH "50C" battery's in series). It's a lot of juice! Using Lt spice I simulated this and found that the voltage spikes can reach up to 20kv. I am trying to figure out if I should use...

Hi all, I have a question about the simplified circuit of the below image. It is about a 16x16 5V LED matrix, controlled via wifi by a controller board with an ESP 8266. I do have more details about all components used, but I try to keep my question simple. :) I can control the LED matrix by...

Does anyone know what kind of plug this is: I'm planning on buying something from eBay that has this connector it takes 1.5A and 15v-AC though this connector I found a power adapter that gives the exact specs as the original did but it's a barrel jack so my plan is if I do buy it from eBay is...

By dedicated voltage regulators i mean a voltage regulator per IC, even if they require the same voltage. for example this is my circuit : Here i use 3 voltage regulators to provide 3.3V reference to 3 different devices. my goal in mind being the isolation of noise that can find itself on...

Hi, I'm trying to build a circuit that will cause fans to be on when the power is on, and remain on for 10 minutes after the power turns off (I have separate battery for the fans). So far, I've got it where wire from the battery splits in two, one going straight to an OR gate and one doing the...