1. 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...
  2. 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...
  3. 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...
  4. 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...
  5. 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...
  6. 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...
  7. 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...
  8. 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...
  9. 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...
  10. 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...
  11. 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...
  12. 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...
  13. 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...
  14. Andersons

    Engine start switch as on/off switch?

    Hello, I need a on/off switch that lights up when it’s ON and is hard to switch, so it won’t accidently turn ON. What kind of switch should I use for this purpose? Can I use a enginge start switch? The current I’ll use is from a 9 volt battery (PP3 alkaline and CRV9 lithium)
  15. Theo_KVA

    Electrical switch for a non-chemical battery - How to do it?

    Hi everyone, I’m seeking guidance. I have a tricky situation which I don’t really know how to get out of. I want to design a system which would consume the least amount of power possible. The idea is to have an ESP8266 do a simple task every minute (updating a e-paper display) and sleep the...
  16. G

    Automatic Switch Saklar from adaptor dc to battery

    First of all, I'm a noob but i want to learn electronics with all of you guys. I want to make a project to make an automatic switch from dc adaptor (that converting from ac supply to dc) to battery for turning on dc LED light. The LED light must keep turning on. In a condition: 1. When the...
  17. Enrique Garcia Mainieri

    Low Voltage Signal T/R switch

    Hello Forum, I am designing an Ultrasonic Reciever and Transmitter circuit, in which the Reciever and Transmitter Transducers are connected with the same cables. That means that the Excitation signal and the Received signal will be transported by the same medium. The Excitation signal is a...
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