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  • Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

pcb

  1. ian.herh

    Help! Does anyone knows Copper paste plug hole?

    Hi guys, Does anyone knows Copper paste plug hole? I currently got a request to fill in the attached file for Copper paste plug hole from my client: Material Properties (AE 5C) Value Unit Thermal...
  2. T

    Design Help with Out of Spec Stepper Motor

    Hello, Good day. I'm doing a custom PCB for a stepper motor and I´ll be using a drv8825. I have followed the typical application of the IC but the motor I have doesn´t match the design requirements. I´m new to electronics, and don´t understand much yet, saying this, what I´ll need to change to...
  3. P

    SMD component identification

    Hello I need help identifying these what I believe are SMD resistors labeled R22 and R23 how does one go about finding what these are without a schematic is it just by size. I don't think I can accurately measure them since they are malfunctioning? Noob here. Thank you
  4. H

    Hobby audio player project noise problem

    Hi everyone, I'm new in here. I designed a controller card project and the card can switch some devices with relays, dfplayer mini to play sounds from sdcard, external bluetooth music player card is connected to the circuit. cd4066 used for audio switching between dfplayer and Bluetooth audio...
  5. hesam_m

    DIY 433MHz 4-Channels Wireless Switcher Circuit

    433MHz/315MHz remote controls are everywhere around us, used to control devices such as turning ON/OFF the lights or a TV, or in applications such as opening/closing parking or villa entrance, … etc. Such remotes are available in the market in various shapes and sizes; however, most are equipped...
    • hesam_m
    • Resource
    • 315mhz 433mhz altium designer circuit pcb remote control schematic wireless wireless control
    • Category: Remote Control
  6. D

    HELP: Induction hob power supply fault (incorrect voltage to rectifier)

    Hi everyone, I have a CDA HVN91FR induction hob that partly works. 2 hobs (connected to one PCB board) are not working. The other 3 are. Can't see any visual damage/problems. Upon closer inspection, the power supplied to the rectifier in the 'dead' PCB seems too high. In the working PCB board...
  7. K

    Custom manufactured PCB for controlling a motor with flex sensor

    Hello all, I just had a general question and if this has been asked I am apologize in advance lol, I would like to have a circuit built that I can attach a flex sensor to and have it control a motor output, I have already made a circuit with an Arduino but I was hoping for a very small PCB...
  8. T

    Small Scale Mini Bowling Project

    Hello, I am new to this forum community but I need your help. We are starting on a new project to construct a two lane multifunctional mini bowling machine (small scale). The two machines will be controlled using a single microcontroller for the motors, switches and sensors, together with a...
  9. hesam_m

    3-Wires/4-Wires FAN Control and Over Temperature Protection using LM35 and ATTiny13

    Proper thermal dissipation is an essential rule for nowadays electronics. The best operating temperature for the electronic components is 25 degrees (standard room temperature). Thermal dissipation in some commercial devices is not done properly which affects the lifetime and performance of the...
    • hesam_m
    • Resource
    • arduino fan circuit cpu fan fan microcontroller pwm fan speed circuit lm35 pcb schematic tiny13
    • Category: Electronic Projects
  10. hesam_m

    An Ultrasonic Range Finder Using an SRF05 and an ATTiny85

    An ultrasonic range finder is a useful tool in a variety of real-life and robotic applications, such as in obstacle avoidance and distance measurement systems. The ultrasonic range finder measures the distance by emitting a 40KHz pulse of ultrasonic sound that travels through the air until it...
    • hesam_m
    • Resource
    • attiny85 circuit distance measurement pcb range finder srf04 srf05 ultrasonic
    • Category: Electronic Projects
  11. H

    GPS receivers Front-End Design Problems

    I am designing a GPS L1(PWR=-160dBW) band Direct RF sampling receiver and the front-end: (passive antenna + LNA(21dB) + BGA1(30dB) + jumper + BPF(L1(fc=1575.42MHz,BW=15MHZ) + BGA2 (30dB) + BGA3(30dB) + VGA(-13.5 to +18 Gain Control in 0.5 dB Steps) ). all amplifiers are supplied with a +5 V...
  12. C

    How do I combine separate circuits into one schematic (for project purposes)?

    I started the basics of PCB and doing schematics around 6 weeks ago in my Computer Engineering Drafting and Design class. We used EasyEDA online tool to create the SCH and PCB for our assignments/activities. Our project now is to combine the circuits that we have made before into one system so...
  13. A

    Find a PCB salesperson (Toronto)

    We need a salesperson with PCB sales and customer development experience in North America. We have one-stop production service capabilities for PCB design, manufacturing, SMT, product testing, and product packaging. We have multiple factories and cooperative suppliers.
  14. R

    Noob wants to understand Physical display driver

    So I've some experience with microcontrollers and making PCB's. I've been really interested in making a PCB for a "physical" display driver(saying physical so it will not be confused with a program). But the problem is, I can't find a single tip on working with the display driver components(Not...
    • ReWallt
    • Thread
    • beginner connecting datasheet display driver microcontroller pcb programming
    • Replies: 19
    • Forum: Microcontrollers
  15. Raider36

    Laptop internal sd-card-reader.....possible upgrade/mod ?

    Hi all, I have an MSI GE65 RAIDER 9SF laptop https://uk.msi.com/Laptop/GE65-Raider-9SF/Specification Amazing laptop with 1 x sata 3 + 2 x pcie 3 slots, but all that's letting it down in my opinion is the slow sd card reader. Of course i can use a bulky external sd card device which i have, but...
  16. L

    I'm looking for smallest and cheapest transmiter and receiver for Remote control toys. Can you help me with BOM?

    I'm looking for smallest and cheapest transmiter and receiver for Remote control toys. Can you help me with BOM and circuit diagram? I have gone through some articles which suggests for readymade circuit available on Amazon. But I want to build it without using any readymade circuit.
  17. S

    Help In Identifying Power Transformer Replacement

    Hi All! Never done a forum post before but I thought I'd give it a shot to see if anyone out there had any insight into an issue I'm running into on a repair I'm doing! QUESTION: I need help in identifying what the specifications are on this power transformer (pictures below!). It appears...
  18. R

    Short-Circuit Protection for 3-6 Volts AA Batteries

    I’m looking for a circuit that can protect 3-6 Volts AA Batteries when a short-circuit happens. When the short-circuit happens, a second circuit (LED blinking) must be triggered and the batteries must be protected. The goal is that the LED won’t stop blinking until the short-circuit is undone...
  19. I

    can someone name this component?

    I am trying to find this component but I dont know the name of it. 4 conductor connector search showed me other types of connectors. Thanks
  20. D

    How to Make DIY Home Automation System Using Wemos D1

    How to Make DIY Home Automation System Using Wemos D1 A simple home automation project allows you to control home appliance from anywhere. Blynk provides very good and attractive interface. Story Video Video In this project we are going to build simple home automation system in which we can...
  21. O

    RF 50 Ohms Dummy Load PCB Design (High Frequency Ground Plane)

    Hi I am a rookie on both RF and PCB design and I am currently trying to do a 50 Ohm 11 Watts Dummy Load project for 100MHz-1GHz. My calculations are done for the load but I have some questions about designing the PCB. I am trying to do it as a microstrip line and as a simple structure of the...
  22. S

    Digital Pregnancy/Drug/Diagnostic test

    Hi All I work for a medical diagnostic company which develops drug/malaria/HIV/etc diagnostic tests. I have been tasked with the role of learning and developing a digital display to mitigate human error when reading the results. I was guided to look at the ClearBlue pregnancy test (with LCD...
  23. D

    Missing datasheet from the new motordriver JYQD_7V.3E3 24V

    Has someone the new datasheet from the JYQD_7V.3E3 motordriver 24V (that one with the hall sensor pads on the side)? I can't find the new version or this one where the hall sensor pads aren't aligned...
  24. Z

    ASKING FOR PCB LAYOUT SOFTWARE SHOULD

    Hello, I was thinking to try and do my own PCB layouts myself, and then generate the gerber files so I can give them to my PCB manufacturer. But I never used such a software and I would like to ask this forum which one I should use? It should allow me to design layouts from the smallest. To...
  25. jamesbulini

    What do you think about this 3D model of PCB?

    Thanks for everyone help me.;);););) Now my new project 3D model is done. I build it with my teacher, and this project takes me a month to do it. Hooo! Feel free to leave a comment. :angelic::angelic::angelic::angelic::angelic::angelic:

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