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  1. B

    Problem in charging 450v 680uf capacitors at the same time

    Make sure your inverter and power supply can provide enough current to charge all five capacitors in parallel.
  2. B

    Radisys EPC-6a re-flash

    I think it's better to contact the manufacturer of EPC-6a directly.
  3. B

    Need help with Easy EDA stuff

    You can post your question to the easyeda forum if any solution from here does not work: https://easyeda.com/forum/category/2
  4. B

    is it possible to build wireless tags

    Are you looking for something like this? https://wirelesstag.net/
  5. B

    Google plans to scrape everything you post online to train its AI

    Nothing is personal now a days......
  6. B

    Need help to make two doorbells work simultaneously.

    I think the problem you're having is that the 3V relay module is not getting enough voltage to trigger. The 2.85V signal from the video doorbell is not enough to overcome the coil resistance of the relay. You can use a step-up converter.
  7. B

    BLDC control using RPI Pico W

    This video also shows how to control a BLDC motor with a Raspberry Pi Pico:
  8. B

    Fire alarm using a PTC as a sensor.

    Check the output of the OPAMP. Maybe it is not changing to switch ON the BJT. However, I find temperature sensors preferable. These are quite easy to use with microcontrollers. https://www.theengineeringprojects.com/2019/10/what-is-thermistor.html
  9. B

    LED screen repair

    I think it's better to go to the seller for an after-sales service. If they can't do anything, as per iivs's answer, maybe it's time to buy a new one.
  10. B

    Is it possible to build an homemade mobile signal amplifier?

    Do you mean mobile signal booster? Here I have found a tutorial. Don't know how much it works: https://www.instructables.com/DIY-2G3G4G-Wireless-Cell-Phone-Signal-Booster/
  11. B

    Hobby Stepper Motors

    The 28BYJ-48 stepper motor operates at a relatively low speed. If you require even higher speeds and torque, you might need to consider a different stepper motor model altogether. You can consider Nema17.
  12. B

    Help Request: I need to identify this board

    I think DJI forum will be a better place for your question: https://forum.dji.com/
  13. B

    Belated Rest in peace. Don Lancaster

    My condolence to his family and friends.
  14. B

    Mpu6050 initial value

    You can try this code: #include <Wire.h> #include <Adafruit_GFX.h> #include <Adafruit_SSD1306.h> #include <MPU6050_light.h> #define SCREEN_WIDTH 128 // OLED display width, in pixels #define SCREEN_HEIGHT 64 // OLED display height, in pixels // Declaration for an SSD1306 display connected to...
  15. B

    Fire alarm using a PTC as a sensor.

    You can consider AD8615, OPA128, or LT1793.
  16. B

    I need some help with making a pcb

    Duinotech LoRa board is not open-source as far as I know. So, I don't think you'll find the schematic.
  17. B

    Total Electronics Newbie with an idea, LOL

    The following links can give you some guidelines regarding how to make a DIY 3D printer. https://all3dp.com/2/how-to-build-a-3d-printer-from-a-kit-or-from-scratch/ https://www.pcbway.com/project/shareproject/Stepper_motor_controller_board_1fb6e35f.html
  18. B

    Amateur NMR project accepting free help! Developing category theory algorithms on an FPGA

    Remember to conduct a thorough literature review and consult with experts in the field to refine your design, address potential challenges, and ensure the safety and feasibility of your project.
  19. B

    Help request: Gesture Controlled Bluetooth Speaker (Arduino)

    You can take a look at SparkFun Qwiic Wireless Speaker Kit. This Kit Gives You a Head Start for ESP32-Powered Bluetooth Audio Projects. https://www.sparkfun.com/products/21773
  20. B

    need power supply station

    You can consider Vantek DPS 3305P. It is 30V, 5A.
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