1. Siridean

    Top Level Design help for a 'switching array'

    Hello, I was hoping to get some help/advice on a personal project I'm working on that requires quite a bit more electronic hardware involvement than I'm used to. I can manage code, computers, microcontrollers etc fine but I'm not very well educated in general electronic hardware at all besides...
  2. K

    How does this four-pin reset switch work?

    Hello, I am studying a schematic, and am not sure how this reset switch is supposed to work: I cannot find any other switch that uses this symbol, and it just looks like all of the pins are shorted to ground. I don't understand why/how this switch works on the actual board. Is anyone able to...
  3. xThornx

    DPDT Switch Motor Control Precautions

    I'm trying to control brushed DC motor that is connected to a gearbox that moves a linear slide to raise and lower a sensor. The motor will be controlled by an operator that is raising and lowering the sensor before and after the runtime of the general system. I am trying to keep it as simple as...
  4. Nabolt

    Help identifying switch

    I am repairing a Sony CD Boombox and the CD player latch switch (which holds the cover and indicates it’s closed) is busted (see views below). No part number or reference anywhere I can find. It does have 2 mini micro pins at the bottom. The closest I could find matches it in size looks like a...
  5. 2

    Momentary to control on & off circuit

    Hi everyone. As stated I am trying to figure out the easiest way to make a momentary switch control button control the on and off for my 12V lights I have on my vehicle. I know the very basics of electronics, I currently have the lights powered by two different switches on relays. Longer story...
  6. M

    Need transistor circuit to control optical switches

    I am a digital designer so anything analog is out of my expertise. I need to control an optical 2x2 switch with the following truth table: The pulse is in the msec range and the driver current is about 200mA. I have an FPGA that can control the transistors but not sure how to arrange them...
  7. NooBinProgress12

    Making a 110 channel input, Voltage sniffer, from scratch. Advice appericiated!

    Hello Everyone, my name is Fredrik. I am new to this forum, and I want to ask you guys about a project I am working on atm. I plan on making a test tool (or voltage sniffer) for monitoring voltage on multiple signals at once. The ECU I will be monitoring has up to 110 different inputs. My first...
  8. D

    Overflow-multiply error in PSpice when swapping one IGBT for another

    Hi. I'm trying to simulate this full-bridge single phase inverter for a project at school in PSpice. As the main objective is picking the IGBT switches and making them work in a full converter, I am just using a simple pulse voltage source for the modulation. I made it work with the default...
  9. B

    Is this switch fit for my board?

    Hi all, The push button switch of my multimeter broke down. I threw the switch out. During the holidays I got intrigued and would like to fix it. This is the schematic of the switch I bought: https://robu.in/product/7x7mm-6-pin-dpdt-self-lock-lock-push-switch-10pcs or a direct link...
  10. Genosphere

    Trouble: Simulator expectations vs constructed circuit; 555timer.

    So I am having some trouble building the circuit I had built in a sim, several to be exact, which all seemed to work the way I wanted them to. Now that I have built the circuit on a board, Im not getting the results expected. Checked wiring and and parts, things look ok. Odds are I have missed...
  11. W

    MOSFET allows current through even when turned off

    Hi, I'm relatively new to circuit design and I'm trying to create a circuit to turn on/off a 6V DC motor using a microcontroller. To do this, I am using an N-channel MOSFET. The MOSFET appears to be working, because the drain to source resistance when the gate = 0V is ~10 MΩ, and when the gate...
  12. Ron2020

    Wiring Headlight and turn signals for a simpleton

    Greetings, My current project is trying to wire a headlight and two turn signals to a motorbike using a 12v rechargeable battery. There are no existing electrical parts of any kind for lighting aside from what I’m doing currently. Complete custom job. I need advice: What I have is: A switch...
  13. J

    IRF540N application as a switch trouble

    I am fairly new to using MOSFET's in circuits and I am a little stuck. I want to use the IRF540N as a switch, which will receive a voltage to the gate, and 18-30 volts at the drain. I would like for the source to essentially follow the voltage of the drain as long as there is voltage being...
  14. Andersons

    (ON)-OFF-(ON) pushbutton?

    I’m looking for a pushbutton switch that’s normaly open with two outputs. The first push will close the first output, when the button is released it will open it. The second push will close the second output and when the button is released it will open it. The third push will close the first...
  15. Andersons

    Two step pushbutton switches and weird datasheet numbers

    Hello. I’m looking for two step pushbutton switches (ON)-(ON). I was looking at this datasheet: https://eu.mouser.com/datasheet/2/603/p4-catalog-pdf-1145024.pdf In the section ”ACTUATORS FOR BASIC SWITCHES” for example rugged seal panel switches doesn’t make sense in reference to the ”P4 PART...
  16. A

    Current dependant load switch, cant solve it passively?

    Hey there, i couldn’t fall asleep trying to solve following scenario: i have two power supplies running 24vdc in parallel, a main and one supplemental power supply. Both are being filtered with capacitors before supplying a single load. Now if one wants to run it, such that the supplemental...
  17. A

    Input supply jerk of triac when power turned on

    Hi, I implemented the circuit from this video. After implementing, I realized a mistake, whenever the main supply switch turns on, there is an initial jerk (also visible in the video, the link starts video video from that point of issue) then triac operates as per gate voltage level on gate. Is...
  18. B

    Old lamp switch repair and identification

    Hello, I’m brand new to this so please forgive me. With plenty of time now on my hands I have decided to fix a lamp that’s been sitting around. The switch is broken so I bought a new one that illuminated because... why not. It works but is about two millimetres too long and probably a mm...
  19. maitrey

    Design Interlock for two operations (Manual Switch and Automatic Switch)

    Hello, I am in the process of designing an interlock for two operations. 1. Operated by Manual Switch 2. Remotely through an Automatic Switch (Can't be controlled Manually) If user turns manual switch then operation should start. (In this case, if someone activates automatic switch it should...
  20. Lambo Av

    2 Generators connected to bus. Maximum, minimum voltage across light, peak voltage, pulsation

    2 generators are connected to the bus below. Given V1 = 300V, 50Hz V2 = 400V, 60Hz When the switch is opened, calculate i) the maximum and minimum voltage across both light 1 and 2. ii) peak voltage across both lights iii) maximum number of light pulsation How do I solve the issue above? Any...
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