1. psdkiajhn

    i need help with my tft display

    hello, i had a 9 inch monitor my car and after long time i open it and i want to use it's TFT display, i don't know how to use it but i know something: 1. it has 50 flat and one board on it, that merge the 50 flat from display and 10 flat from controller and send it to main board with 50 flat...
  2. J

    Getting into electrics.. I have no clue why this 2 channel relay receiver is not working the way I wired it.

    I know its a bit janky but Ive just needed to make this door opener device remote control and for some reason, I cannot get this receiver to power anything even when both channels are on. Can someone help me?
  3. eggwardo

    Problem using PWM with high power LEDs

    Trying to design a photo-enlarger, and as part of it, I need to be able to control the relative brightness of a 20w cobb led thats powered off of 30v. I'm trying to use an off the shelf mosfet board (HW-700) that I had around that I can use alongside an arduino to control the led using pwm...
  4. A

    Dso138 lcd issue

    I Recently got hold of a dso138 kit, upon finishing the kit I went through testing all of my voltages and everything appears correct. The LED flashes once when powered on but only when the LCD screen is not plugged in. If the screen is plugged in, absolutely nothing happens and when I check my...
  5. Aikju (Isaac)

    How to make my delay relay circuit latch?

    I have bought this Delay Relay module off of amazon. I am using it to make a circuit that will act as a latching relay with a delay for a 12V power source. The circuit should work as follows: There is a switch to activate the relay. When activated, the relay will remain on until the 12V power...
  6. J

    Suitable replacement for THERMAL MAGNETIC OVERLOAD SWITCH on pottery wheel

    Hello, fairly new to all this but done my best to get to this stage! Im repairing a pottery wheel and am looking for a modern replacement for a STOPCIRCUIT GDU-2U-73-P1. As i understand this is a panel mount 2a, trip curve c, circuit breaker with an auxiliary contact. Looking through spec...
  7. 123dsfsdfdsfsdfsdf

    8051 need help with code:CCC

    So hello:3 I have already tried many things, and looked at many things, but I can't implement any way to read a value from my data table character by character here code: Morse: mov DPTR, #Text ; Point to the beginning of the text mov...
  8. C

    12v Automotive Light Switch

    Hi all, I'm looking for some help with a light switch from the rear interior lights of a Vauxhall Insignia. I've scoured the internet with the parts numbers and manufacturer assembly numbers etc and came back with no results. All I know is that this is an on/off push button switch made by...
  9. G

    The Buzzing that Drove me Mad

    Hi all, First, for you ADHD go-gettum problem solvers who like staring at funny graphs that aren't doing what they should be doing, the TL;DR: There's a funny electronic buzzing sound in all of my sensitive/expensive electronics and it's even gotten louder; please help me understand this...
  10. alexbez

    DIGITAL PIANO NOT WORKING

    Hey guys, I am trying to diagnose what the issue is with my Kurzweil CUP2 digital Piano The piano displays no sign of life besides a red on led. LCD screen does not display anything Buttons do not seem to do anything(there is a little red light above each button that indicates the "mode" it is...
  11. alexbez

    Relay bypass help needed!

    Hey guys, I am relatively new to micro electronics, and am in desperate need of help! I want to bypass the muting circuit in a electronic piano. This involves either activating the relay, or pulling it to ground (BA3-5 Relay, and the highlighted LS1 in the picture below). Please could someone...
  12. Ash88

    Need help wiring a microphone

    Hi. A friend gave me a JTS JS-1E large diaphragm condenser mic that has been partly disassembled and needs some soldering. Seems to be quite simple but Im not sure how it should be wired. As shown in the photos there is an M- and M+ that I think need to go to the diaphragm but I don’t know where...
  13. cinar

    Troubleshooting circuit design for sensor input and desired output range

    I designed a circuit to process input from a sensor with a range of -300 mV to 300 mV. The desired output of the circuit is 0 V to 600 mV. To achieve this, I used the op-amp equation Vout = Vin + 0.3 as a basis for my design. However, when I simulated the circuit, the output was only around 900...
  14. K

    How do mobile robot charging contact bars work? How are they safe?

    Hi all, Question for any of you who may know: How does mobile robot charging work safely? I notice a lot of delivery robots are designed with these large contacts (boxed in red below), but how are these designed to prevent them from being live contacts in case of customers accidentally...
  15. M

    Fire alarm using PTC as sensor

    Hi everyone I need to make a circuit with the following elements: The output will be a siren connected to a 230 V and 50 Hz network. The control circuit will use a 9 V battery as power supply and an operational amplifier must be used, the siren will be activated with a relay. The alarm will...
  16. Pentinic

    First PCB design - How do I go about testing before production?

    As the title states this is my first PCB I have designed purely through documentation, I have this designed through breadboards and breakouts but am attempting to put it all onto a single board so I can scale it down after I know it all works. Are there any people I can talk to to fix design...
  17. K

    Repairing Christmas/Fairy Lights

    I have a little experience with wiring after having to hot-wire my aftermarket radio in my car when changing it out, however I do not know how to fix this issue. The wires in the plug were loose and the lights were not turning on because of this, so i cut it off and figured it'd be as simple as...
  18. Remo0g

    Elaut eurograb rev2 motor control problem

    Hi, I bought a claw machine and there seems to be a problem with the motor control of the claw going up. when the claw is going up it will go for a brief period and then stop, the motor will stall and it throws an error (claw not going up) . Motor seems fine 28v 0.48a when powered with bench...
  19. BuyingOffDeath

    Unexplainable RF Power levels

    I have an RF Explorer to use to scan what RF's are around me. I am curious as I'm am just getting in learning about wireless transmission and propagation. However I can't explain these power levels of -10 dbm all the way to -0. The RF Explorer does seem to be working correctly just based off of...
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