Questions tagged [spdt]
The spdt tag has no usage guidance.
47
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Power supply switch PS-ON with bus signal
I have a power supply (PSU) (not standard computer ATX PSU)
PSU EPP-300 is at https://www.meanwell.com/productPdf.aspx?i=715
with function connector:
5VSB
DC COM
PS-ON
If I'm right: DC-COM = GND,
...
- 3
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1
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52
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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 ...
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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 ...
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57
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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
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4
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57
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Confusing SPDT Toggle Switch footprint
I am looking at this datasheet.
It is a simple SPDT switch, but it has 5 pins in the footprint instead of 3.
Since I am using it as a power on/off switch, I wired it up like below.
I want to make ...
- 119
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66
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The BJT configuration representing a single pole double throw switch
How is the simplest BJT configuration for performing a single pole double throw switch?
- 399
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2
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82
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Manual Override Switch Conundrum
I want to have a switch on the wall by my bed that is wired to my combi boiler so that I can switch the central heating on without having to get up and go to the boiler if I wake up earlier than the ...
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116
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Modelling single-pole, double-throw switch in PSpice
What is the easiest way to model an ideal single-pole, double-throw switch in PSpice? And a single-pole, triple-throw switch?
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140
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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 ...
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1
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2
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187
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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 ...
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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 ...
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2
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218
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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 ...
- 23
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2
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150
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How design a PCB that hosts an SPDT relay
I'm designing an esp32 interface on its own PCB that will be used to control an SPDT relay by means a software based on Home Assistant.
For this purpose I'll use an output of ESP32 (say GPIO 34) to ...
- 359
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80
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I need to control a bi-stable relay with 2 SPDT latching switches
I'm a mech engineer trying to use 2 vandal resistant, SPDT, latching switches to control a power distribution module. The module has an internal bi-stable relay to turn the outputs on and off. The ...
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2
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270
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bi-directional motor using SPDT relay and diodes
I have a bi-directional motor that I am trying to control using an SPDT relay. It is only working in one direction when I remove the circuit for the opposite direction, and it is either shorting or ...
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137
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Opto coupler output current
I am trying to drive R570412030 SPDT switch using opto-coupler LTV206. I am attaching the setup as shown below:
When ever the 3.3 V (control signal) triggers the opto-coupler, the SPDT will be turned ...
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68
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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 ...
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3
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1k
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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 ...
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127
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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, ...
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227
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switching an audio signal with a SPDT switch
Would you place the SPDT switch in front or behind the opamp?
the benefit now is the load stays equal on the source, 49K9 Ohm .. and the opamp is jobless.
but will the opamp cause noise (inverted)?
...
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157
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SPDT Relays in Parallel
Currently I use inexpensive relays and power supplies to switch in 12Vdc(~200mAdc) via a SPDT relay. Somewhere around 60,000 units we have to replace the relay because of bad contacts. I would like to ...
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1
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53
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Texas Instrument SPDT TS5A22362DGSR not swtiching properly
I have bought a couple TS5A22362DGSR from TI and it's not switching properly, I'm trying to switch between a record player and a laptop. As shown above, I want the signal from a record player, after a ...
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2
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465
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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)....
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174
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How to properly drive parallel analog switches (variable capacitive loads) with opamp(s)?
So as you can see I have 16 SPDT switches on one side of my 16 'RUT paths' and 16 SPDTs on the other side. Each SPDT(ADG1434) has two source pins (SXA and SXB) and a common drain pin (DX), 'X' ...
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53
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Signal routing to power amp LM1876 based on TS5A22362 SPDT
Has anyone ever used the TI's TS5A22362 CI to route audio? I though of implementing the circuit below on which I intend to use the same supply voltage to switch between normally closed and normally ...
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1
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48
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Relay to electronic switch change
I would like to change relay functionality in electronic switch. As per the concept, relay pole and NC position is short even there is no power applied to it. I need complete exact relay functionality ...
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0
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40
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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 ...
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225
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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. ...
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1
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174
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Dual led and transistor 3906 3904 switching with spdt switch on and off toggle help
Hi i have 3904 and 3906 transistors, leds and spdt switch.
I tried to use the 3904 so that when voltage is applied to base, it flow from power source into the led and then to ground. But now i have ...
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2
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725
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Brushed DC motor braking with speed controller
I've been getting some amazing info on this site so thanks for all the info so far!
Onto my question.
I know I can brake a dc motor by shorting the terminals but I also know how much current that ...
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97
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How to use a SPDT with no negative capability for audio signal routing?
I have a couple of SGM3005 chips and want to use them as switches in an audio circuit, but they don't support negative signals. The classical solution would be to bias the COM1 input, right? But, what ...
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136
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Night light circuit wih switching bulbs
How can I connect a night light circuit such that one bulb is lit up on a sunny day and one is only lit up at night so that the two lights don't light up simultaneously? Also, can I use a SPDT switch ...
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82
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Finding an analog switch IC (BBM & SPDT) for video signal
I'm looking for a SPDT analog switch IC with Break-before-make to switch between video signals. However, the amount of options available leaves me overwhelmed with no clear option in sight.
I've ...
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1
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143
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Light switch with 3 SPDT switches?
In the below circuit, I have two switches that can turn the light on or off from those two locations. Any 'switch' will turn the lights into the opposite position:
How could a circuit be made to ...
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2k
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Powering a solenoid valve with a relay and no external power source
I have a solenoid valve (12VDC, 540mA) that I would like to control with a 12VDC relay (15A SPDT). Is it possible to power the solenoid without an external power source seperate from the one powering ...
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101
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How to make a solid state SPDT switch?
I'd like to make an analog SPDT switch along the same lines as FSA2259UMX or similar chips, but out of simple discrete components. This is partly for learning, and partly because I'm redesigning a ...
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465
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Normally Closed Negative Output, Positive Input Relay
I'm attempting to wire up my remote start in my manual transmission vehicle to ONLY start when the vehicle is in neutral. The way that the transmission works is like this:
When in neutral, resistance ...
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2
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378
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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 ...
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208
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Control dual color LED without microcontroller
I have a latching, SPDT switch with dual color LEDs (the first page of the datasheet), that can either be Red or Blue depending on the polarity of the voltage. I would like them to be one color when ...
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1
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82
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Trigger an analog SPDT switch ONLY with a long button press
I'm currently working on project where I need an analog SPDT switch to be only triggered by a long button press.
Long story short I'm trying to make a module that would fit inside a Game Boy. This ...
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1
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578
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can SPDT relays replace SPST switch? Or does it depend on the particular implementation of the relay?
I am working on SKU consolidation and my concern right now is if I have a cheaper option of SPDT switch with all the ratings same as SPST switch which is currently used. Can I replace it? Or does it ...
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2
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339
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How to prevent spdt shoot through?
I am working on a simple solar system for heating water. The idea is to use sun power and if not enough, use the power grid at night. I have a solar panel and a MPTT boost converter which collects the ...
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1
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514
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How to read pinout of this SPDT relay G8N-1F
Introduction:
The direction indicators of the car (Honda FR-V) are not working anymore. I managed to get the ICU (integrated control unit) out of the fuse box beneath the steering wheel. Hell of a ...
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104
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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 ...
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762
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XOR light switch with two switches and a relay
I have just created a circuit which uses an SPDT relay to switch a light on or off whenever i double clap. It works fine with my desk lamp, so i thought it would be nice to add it to my wall mounted ...
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3
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683
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Converting a push on/push off SPDT switch into a toggle
I'm working on a small electronics project: trying to convert a guitar footswitch into a push-to-talk foot pedal.
At my disposal, I've got a Teensy acting as the actual HID device (to be connected to ...
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1k
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How to/should I bypass switches?
I want to make a stage box (with light in it) so when the guitarist or singer steps on it, it lights up. In the box I want to use a 12W (or maybe later 2) LED lights (which have a normal EU power plug)...
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