Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [spdt]

46 questions
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How to use current sources correctly

In this simulation the circuit generates a AC signal at "Electrode". Here I am using two SPDT-Switches (Ron = 4 Ω). My first question: Why isn't the signal correctly rectangular? And how can I correct that? On the second circuit I am replacing the…
Electrofreak
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Control AC load via relay with DC trigger?

The headlight of my motorcycle is AC powered via stator. I want to switch between Hi/Low beam using a single pole double throw (SPDT) NC relay. Power to pin 30 (AC) Ground to pin 85 (?) Trigger to pin 86 (DC) Output 87 Lo-beam (AC) Output 87a…
ben
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Snubber diodes on relay h-bridge

For my project I am controlling a motor 12 volt 6 amps (forward & reverse direction) with the help of two SPDT Relays that are controlled by a 2 channel remote as shown below. Where do I put the flyback diode? (It's used for sudden voltage spike…
alex holmes
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Dual batteries changeover circuit to avoid power loss

I have a similar question to the one here How to create automatic dual battery changeover/switching circuit for uninterruptible power?, but would prefer to use a mechanical switch (eg a rocker switch). The setup is this: I have two 12V batteries…
Aerodactylius
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Feed protection to the Mosfet drains

I have a machine running three 12v solenoid coils. Currently, control is carried out by manual switching of the negative through SPDT toggle switches. The coils all have a positive 12v common. I am wanting the ability to additionally control the…
Jacob Goona
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1 answer

Power pin used as power in and power out

This is my first post here... I hope I will do everything correctly. I need to use a pin as power in and power out, switching it when needed. In particular, I want to use a USB micro B (5 pin) and use the ID pin as power in-out selector like an OTG…
Andrew
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SPDT switch reference schematic working

May I know what is the function of the below highlighted discrete components in the Switch circuit? Regards, Chitharanjan M
Chitharanjan
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Auto switching between power sources using SPDT relay causes delay

I have a circuit with two DC Power sources, one is a 12 V, 1 A adapter and the other is an 18 V, 150 W solar panel. I have a DC buck converter LM2546 which turns that 18 V into 12.4 V. The 12 V power source isn't always available due to power cuts,…
Ali
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Replacing SPDT relay with MOSFET

I'm having trouble replacing a SPDT relay with a MOSFET circuit. I have an SPDT relay that serves as an emergency brake of a small motor when the power goes off, shorting both motor inputs. It's slow and I want to change with some MOSFET. I've read…
Papuan
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Is this a SPDT On-On switch?

I want to install a Master Switch on a paramotor using the correct switch. Would appreciate your help to clarify the specific type so I can order the correct one from Mouser or Digikey online. Master On/Off Switch Off position is Normally Closed…
Jim Sutton
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Are microwave SPDT switches typically reciprocal?

This is something of a basic question, but don't want to assume prior to buying an expensive switch. Are microwave (think up to 20GHz) switches typically reciprocal? When reading specification sheets, they are normally very specific in mentioning 1…
NAP_time
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Powering multiple led strips by one switch

I have a problem I cannot figure out. I have this circuit which should control two LED strips either by wemos OR (methods are switched between by SPDT because I don't know automatic way) manually. Each "switch" should be able to turn on one or both…
GTessa
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SPDT relay is not switching

I have a 8 channel, 10A SPDT relay, which I'm having problems getting to work. Here are its specifications. I've attached a few images below for reference. So, initially, I connected a 6V power supply to VCC and GND pins and supplied a 5V input…
Ved Soni
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1 answer

Linear actuator doesn't move or moves very slowly

I am observing issues with linear actuator not moving and/or moving very slowly at highest speed setting. I am using a DC linear actuator with a speed control unit and rocker switch to extend and retract the actuator. The application involves…
Rock
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SPDT switch for low power application

In my battery powered mouse design, for the main switches I was initially using the traditional SPDT switch circuit, but after realizing how bad it is for low power applications I moved to a low-power circuit: The main difference between the two is…
StefanoN
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