1. D

    LED Controller PCB Design Feedback/Suggestions Request

    Hi there, Main Question I'm hoping to get some feedback on this PCB design and the overall design, because this my first real electronics project. Also, I have several questions about feedback I received on ESE. Background I'm aiming to make an instrument for my brother, and since I've been...
  2. zod1aq

    Computer Mouse Solder Problem

    So I had my first soldering experience on my second computer mouse, idea was just to put in new microswitches. I began to do with my old thick soldering iron and now it looks like I applied too much heat and my solder pads GONE. I bought myself a new better soldering iron, but havent seen any...
  3. M

    Nokia Earbuds BH-605 not charging

    Hello, I have this issue with the case of the Nokia Earbuds BH-605 where the battery is not charging anymore. I noticed that a diode has fallen off but I can't find it anymore. Below are some pictures. I'm an absolute novice regarding to electronics, is there a way to determine which diode I...
  4. A

    Looking for some advice on getting started with PCB repairs (excuse the noobishness!)

    Hi all I hope you are well and keeping some degree of sanity during the pandemic! I run a little business repairing and servicing treadmills which covers all aspects of getting hem back on track The majority of the repairs centre around the PCB's which seem to be relatively simple but break...
  5. Nepi7

    TC7660 (charge pump) damage issue

    Hello, I designed a PCB with 3pcs TC7660 charge pump ICs. They are going to be connected paralely to reduce output resistance. Each of them can be disconnected at the output side via jumper. I have a problem to make them working even when they are separated from another components. It seems like...
  6. putout

    How do I reset this Wi-Fi PCB module ?

    This was removed from a Elm327 Wifi obd2 reader it had invalid WIfi settings so it was unable to make a wifi connection I tried shorting GND to RST while only applying 3.3v to the 3.3vpin - no luck any tips would be appreciated . that mess on the RS232 header came like that from the seller
  7. dignificent

    New Test Points 5199TR (PURPLE) from Keystone Electronics are cracking and falling off after reflow

    It's weird that primarily 50% of the time the purple test point is the only color to have this issue, why purple? Part> https://www.mouser.com/datasheet/2/215/Keystone_Electronics_04082019_5190TR-5199TR-1551357.pdf
  8. M

    How to cut-slots in the middle of the PCB eagle?

    I am wondering how to cut some shapes in the middle of the PCB. I am not sure on which layer I need to do and also no idea about how the manufacturers consider that? Please let me know on which layer I need to cut and also how to add it to CAM processor in order to see it has been cut. Is there...
  9. nikolopikolo

    Unregulated power supply PCB design problem

    Hello, I'm in the process of designing a PCB for a simple dual polarity unregulated power supply and I have a question regarding zones and traces. The PSU is designed to supply 4A and 40V on each of the two rails. There are two 10mF capacitors implemented to avoid ripple. So through each of the...
  10. Gralf

    Help! Replacing button on PCB.

    Hello all! New homeowner here, and our house has what I am told to be a pretty nice Gas Fireplace. Which would be great except that the up key on the remote control doesn’t really work. I don’t really want to fork out the $100+ for a new remote (new homeowner and father!!) and I am pretty...
  11. M

    SPST pin configuration

    Hello fam, I ordered a SPST switch (Through hole type) from distributors and also download the cad file for PCB layout from the same website. I am now confused with the pin configuration, in the footprints it has 3 holes. Usually the SPST switch has only 2 pins right?. I have gone through the...
  12. L

    Samsung Washing machine won't power ondc41-00189a

    Hi there, I have samsung eco bubble washing machine. I was using multimeter probes to test voltage and the probe slipped and it seems something was shorted. Now the machine won't power on. PCB dc41-00189a I'm a Newbie Please help me to troubleshoot this pcb.
  13. youtubeuni

    Convert PWM to DC 12v output for LED brake lights

    My buddy and I have been working on a project for the last 2 years, its a PCB board with 79 LEDs and built-in microcontroller taillights. We can controll every aspect of them... but we've hit a snag when it comes to power. The Volvo C30 uses PWM to send signals to the taillights. This needs to...
  14. Donaldk20

    PCB help for a LG tv

    Hey there , my 1 year old tv recently stopped working , I’m not familiar with these stuff but I’m trying to figure out which is defective in order to replace it. The tv has no standby light showing and does not turn on, the power supply board keeps making a ticking sound, I have checked the...
  15. jcarlson023

    DC Switching linear regular design question

    Hello, I am fairly new to electronics design (I have a mech e background), and am designing a board that requires dropping 12v to 5v with a large current requirement (up to 8A@5V). In a bid to save on BOM, I took a shot at creating my own design vs buying one off the shelf, using the...
  16. S

    Altium Designer "Flip" function not working correctly?

    I am designing a planar transformer in Altium. I am using the planarTX plug-in I found on GitHub which is helping things move along a lot faster - however it only has the capability of creating spirals in a single direction. This means it is not feasible for creation of a series connected...
  17. Fishtacoburritosupreme

    Psu transistor please help

    Please can anyone help me determine what type and model of transistor this psu uses(voltage, amp, etc), the one it had were removed and I have no idea what Trans use D:
  18. I

    T.I. BLE USB MCU Programming Trouble (CC2540)

    Hello Everybody! I am trying to program/communicate with the CC2450 BLE IC, which is a transceiver/microcontroller. My computer is having trouble recognizing the device. It does not show up in Device Manager. I've tried the T.I. tools for trying to communicate with it. I've downloaded the BLE...
  19. M

    Who Knows MOSFETs - Can Noise be Reduced? (Dimmer circuit)

    Hi, I created the following circuit here. The DIM Control Pin sources a 10uA current. I am getting 0.5V of noise on that pin (looking at the oscilloscope). It probably has to do with the GNDA being connected to the MOSFETs. And probably to do with my PCB layout. Currently, I don't have...
  20. pcbdaddy

    Suggest advanced PCB/PCBA manufacturer

    I'm working on several projects where I have 6-8 layer HDI designs. I need to find a cheap and affordable PCBA manufacturer either locally in the US or in Aisa? Anyone can suggest a good and & verified option?
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