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switch

  1. T

    Question about technical limitations of 12v relay switches

    Hi, I'm new here, I've just started a project that has me building an electrical circuit for the first time and I don't really know what I'm doing! I'm hoping someone can answer a quick question. I have a 12v electric motor (has two power levels, at 9A and 20A and it was suggested to go with a...
  2. K

    Circuit of the switch 12v. led-lighting

    One Bit Switcher I offer my own version of the circuit of the switch 12v. led-lighting for the kitchen based on the dual trigger of the hc74 chip. Created with EasyEDA.
  3. D

    Push On - Push Off latching Circuit using an NE555

    Hello, I made a flip-flop circuit using the NE555 to switch on or off some LED bars that I plan to put in my car. Currently I have the LED bars hocked to a SPDT relay and they are setup to come on when the car dome lights come on (closing or opening the doors) On port 87a on the relay I can...
  4. X

    Remotely open door by using same Intercom switch using remote Switch

    Hi, I don't have much knowledge about electronics but I have bought a remote switch using which one can remotely (100 meter distance) turn on/off a light or any other appliance. There is a two buttons "bpt" intercom in my unit. I want to use this remote switch with that intercom such that...
  5. mading2018

    ZVS - LTspice?

    Is ZVS (zero voltage switching) possible in LTspice? :) In that case? How do I implement that in the simulation? Do I need special transistors that is not included in LTspice I imagine... What I understand, compared to hard switching, ZVS (soft switching) make sure to to reduce the turn ON...
  6. Â

    Transient circuit

    My college professor asked us to take a real life problem/device and design and solve its circuit using transient response and Laplace transforms. It has to be a simple circuit, maybe just some capacitors, power source, switch and resistors... My biggest problem is finding a connection to a real...
  7. R

    Derating a switch's load rating with inductive load

    I am selecting a switch to energize a 3/4 hp AC motor. I am concerned about the prospect of contact arcing with such an inductive load. If a switch is rated at 25A @ 125 VAC, it will handle the continuous current, but might there be a reliability issue over time due to contact arcing at turn on?
  8. D

    Switch open only with power

    I'm trying to find a specific type of switch. Once I have power going to a pcb I want the switch to remain off until I switch it on and then stay on after I switch it on. Here's what I'm having a hard time finding. I'm trying to find one that will automatically switch off as soon as the power is...
  9. A

    5V to 12V High Current Switch

    I am using a MSP430 to switch a high powered LED. MSP430 output pin can source 5ma at 5V. I want to switch a 12V source to a LED that will be driving 5A and it will be switched like a strobe very quickly. I need some help with choosing the right transistor or MOSFET in order to accomplish...
  10. Ajith Gopi

    Close circuit on click

    I'm new to electronics and I wanna make a circuit that will start continues connection to another circuit on pulse. In long, If the current circuit gets a pulse, an led (suppose) will glow and will not turn off until the battery is disconnected. I'm planning to make a laser-ldr alarm and don't...

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