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Questions tagged [dpdt]

Used to describe a Double Pole Double Throw relay (usually 8 terminals).

3
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2answers
122 views

dpdt switch to spst switch

I am trying to build a raspberry pi gameboy emulator with a custom board inside of a gameboy adv sp shell. I decided to use an open-source board made by some guy on the internet and I will be ...
0
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2answers
83 views

Reversing Direction of a DC Motor with Delay

I am making a kinetic sculpture and the movement of it requires a reciprocating motion. I have made the designed such that a dc motor powers the movement of the sculpture, and a rotating beam that ...
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votes
3answers
799 views

How to control two separate circuits with one switch? [duplicate]

I have two separate circuits with different types of diodes. One circuit draws 3,5V and the other draws 9V. How can I wire this up so that one switch can turn both circuits on or off? As far as I ...
-2
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1answer
145 views

Where to place a diode - DC 12v motor controller [duplicate]

I'm building a controller for a DC motor. I'm using a 12V DC motor from windscreen wipers. Here is my circuit diagram and a video of the simulation I made. https://www.youtube.com/watch?v=...
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0answers
70 views

Replacing two corresponding switches as one with logic gates, to supply power, around a DPDT relay

This is one section of a project I'm working on. A user can choose between DPDT functionality (so having "DeviceI" be a motor that goes forward and reverse) or the alternative option to add another ...
0
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2answers
206 views

Implement 7 DPDT-switches with Arduino [closed]

OK, so my problem is the following: I have a commercial box with mechanical DPDT-switches for controlling valves by changing the polarity of 2 wires per valve. The box has 7 relevant switches, which I ...
1
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2answers
141 views

Minimum components for BJT (edit: or FET) H-Bridge applied to a small 3-6V motor controlled by Arduino

First, why did he put R3 high--alone: H-Bridge Transistor Smoking? My real question is about the minimum number of parts. I believe the minimum components for a BJT H-Bridge applied to a small 3-6V ...
0
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1answer
50 views

Modifying guitar amp to run on batteries, switching between center tapped transformer and batteries with only DPDT switch

My situation is as follows: I'm trying to convert a small guitar amplifier to dual power. Mains and battery. The power supply that comes in the guitar amp is a center tapped 120V to 14V supply. After ...
0
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0answers
39 views

Circuit design help (dpdt,mosfet,transistor)

i'm a beginner at circuit design, i'm trying to design a circuit that will allow me to connect a PI to my car battery without draining it and have a safe shutdown for the PI. Here is a circuit that i'...
0
votes
0answers
56 views

How to find SPDT IC that doesn't need a power-supply to have NC and COM connected?

I am looking for a SPDT IC (or circuit?) that connects NC and COM even if the power-supply is off. Basically, I need a TS5A3157 without the need of a power-supply in the NC state. The reason for ...
1
vote
1answer
39 views

SPST Power Switch with LED for Guitar Amplifier

I would like to have a power switch for the solid state guitar amp I am building, but I would like an LED indicator to know when it is on. I know how to do this using a dpdt on-off, but would it be ...
0
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3answers
466 views

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)...
4
votes
1answer
496 views

Analog switch with a fixed state when not powered?

I am looking for a chip that could handle DPDT (or SPDT, or ultimately SPST) analog switch for audio routing (in the mOhm range resistance) and can guarantee one state when there is no power supply. ...
0
votes
2answers
405 views

How to implement a delayed release for a reset button? [duplicate]

I have a microprocessor with two lines, /RESET and /HALT, which are independently pulled to +5V DC. To reset the processor, both of these lines must be grounded for at least 100 ms -- they may not be ...
1
vote
3answers
1k views

Snubber diodes for a DC Motor with 2 relays

simulate this circuit – Schematic created using CircuitLab Description: RLY1 relay switches 12v on or off. RLY2 changes direction of current flow to the motor. I have flyback diodes on RLY1 &...
0
votes
1answer
207 views

Wiring DPDT switch to add parallel resistor

folks, I'm a relative novice at electronics, I've done some guitar stripboard projects and things like that, and I'm currently making some modifications to an old synthesizer. I've done a few of the ...
-1
votes
1answer
148 views

Relays and how to use them [closed]

I have a circuit which connects two 6v 10ah batteries in parallel to two motors which together draw ~2A. This circuit has a DPDT switch which I would like to replace with a DPDT relay and have the ...
1
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2answers
1k views

UPS Circuit - Unexpected Inverter Death

I've been trying to build a high capacity UPS with a deep cycle marine battery, 300 W inverter and a Double Pole Double Throw relay. The relay switches the power source from mains to the inverter ...
1
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1answer
60 views

Switching between two power supplies to power bluetooth board

I have a Bluetooth board in which I wan to have the option to power it by a battery or power it by a wall adapter. The power input is a 5mm x2.1 mm plug with two wires (positive and negative). I have ...
0
votes
2answers
508 views

Short circuit problem (batteries getting HOT) within circuit

So I am making a circuit with a simple 12v dc motor in series with an NO microswitch and on off switch conntected to a dpdt switch to reverse the polarity of the motor. The first issue I had was to ...
1
vote
3answers
982 views

DPDT rating combined?

https://www.utvinc.com/switches/utv-inc-back-lit-dual-blue-dpdt-on-off-on-vertical-turn-signal-switch/ I want to use a few of the switches in the link above. They are double pole double throw and ...
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1answer
572 views

Micro switch off in forward and on in backward

I request some knowledge regarding a circuit I am building. Basic I have a circuit connected to a dc 12v motor and a dpdt switch to reverse the polarity of the motor and a variable potentiometer , I ...
0
votes
1answer
83 views

Replace DPDT on-on-on switch with relays

I want to control via Arduino a peltier cooler/heater that uses a DPDT on-on-on switch to set the voltage at the terminals of the peltier cell to +12 V, 0V or -12V. I have measured the voltages at the ...
1
vote
1answer
601 views

Switching left/right audio with a DPDT relay

Is it possible to switch the left and right channels of the 3.5mm inputs below to the output with a AZ850P2-5 DPDT relay (given a 5V power source)? I have a hard time reading the pinout of the relay. ...
0
votes
2answers
361 views

Activate two devices with a DPDT switch and two relays

I'm working on an automotive project. I have an electric water pump and fan, both of which will be powered through relays. I also have an on-off-on dpdt switch. What I'd like to achieve is activating ...
0
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2answers
92 views

Will putting telephone pair through a DPDT switch affect ADSL / VDSL?

I'm changing phone providers soon and the new provider is going to connect a new copper pair to the house. Both lines are going to be active for a time and I may switch back to my current provider in ...
0
votes
3answers
440 views

Double-throw switch with no common connection?

I need a DT, ON-OFF-ON switch to control two independent circuits with no common connection. I need something that behaves like either A and B, or C and D in the diagram below. Does such a thing exist?...
1
vote
1answer
997 views

Combine two DPDT relays to make a 4PDT relay

I'm trying to come up with a replacement for the obsolete OMRON G6A-434P 4PDT relay for a replacement PCB I'm building. I've got a bunch of OMRON G5V DPDT relays and I'm thinking wiring two of these ...
0
votes
1answer
326 views

How does a momentary dpdt switch function?

Ok I'm feeling dumb right now. I got one of these momentary dpdt switches and can see via ohm meter that the middle terminals are normally connected to one of their corresponding edge terminals when ...
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1answer
130 views

DC Motor + Pull Solenoid + 2 Microswitches — Rigging and Timing Question?

so my senior design group at UCF needs some help with the electrical engineering aspect of our project as we are all ME majors and lack confidence in this area. Our design is driven by a DC gear ...
0
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3answers
4k views

Time delay dpdt relay using only pot, relay, and cap (discreet components and no transistors)

I am trying to design a simple time delayed relay circuit that uses only a potentiometer, 5V dpdt EM relay, a single sufficiently large capacitor, additional resistors (if needed), and buttons/...
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3answers
891 views

2 led on latching pushbutton NO arduino

I am looking to push a button and one led comes on when i push the same button again the first led goes off and the second light comes on. alternating lights each time the button is pressed. one ...
0
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2answers
252 views

What type of switch am I looking for?

So I am making an audio switch, and I need a switch that takes 3 dual inputs and outputs one of them, or vice versa, taking one dual input and outputting it to one of three outputs. It needs to be an ...
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vote
5answers
8k views

Creating DPDT Solid State Relay with FETs

I feel like this should be a very simple question but so far I have not found a solution. My goal is to make the following DPDT relay circuit using MOSFETs: The goal is to connect INX to OUTX or OUTY ...
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2answers
282 views

configuring a DPDT switch to choose between two RF signals

I have 2 different signals coming in I wanted to be able to switch between them (choose what to transmit) using a simple DPDT switch. I have the following configuration, but I feel like I'm missing ...
0
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1answer
4k views

Adding Speed Control for a DC Motor

Relatively new to circuits, but I have found this good motor control circuit for a DC motor (I have 2 microswitches, each one reversing the direction of the motor), the only thing is I am having some ...
0
votes
1answer
485 views

How to switch between 2 LEDs using a powered momentary DPDTswitch

Problem http://www.webamplayer.com/dpdt.jpg I need a visual indication which way the DPDT has been thrown. Should I use a relay?
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1answer
259 views

Digital equivalent of a double-throw switch?

I'm designing a circuit that would switch between stereo-jack inputs. Source audio would be plugged into one end, and on the other two ends, two different audio outputs. I want to be able to switch ...
2
votes
6answers
29k views

Circuit for a DC motor with 2 microswitches reversing direction

So here is what I am trying to do... have a DC motor wired to an on/off switch and 2 microswitches. Each switch will reverse the direction of the motor, so one switch tells the motor to go forward, ...
5
votes
3answers
2k views

Harvesting energy from old batteries?

Old batteries (I mean AA, AAA -sized 1.5v ones) usually have some residual energy, which can be used, for example, to charge mobile phones/pads. I have seen some schematics on the Net, but all of them ...
2
votes
1answer
214 views

Do these two DPDT relays function the same?

If I do a search for a DPDT relay with 120VAC coil voltage, 30A and 220/240VAC contact rating as the parameters, I get results that look somewhat like the 2 examples listed below. What is it that sets ...
2
votes
1answer
236 views

Electrically Controlling A motor direction

I want to control a motor's direction electrically. When the input is a zero, I want it to go one way, and a 1, the other way. The only way I can think of this is a solenoid with a spring attached to ...