Questions tagged [relay]
A relay is an electrically controlled switch. Electromechanical relays use an electromagnet to activate mechanical contacts, solid-state relays use semiconductor switches.
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Closely spaced relays: same or inverting coil polarities
I have several relays (G5PZ-1A-X DC24), that I will have to place very close to each other (side by side).
The coils are not polarized, so can be powered either way.
In order to reduce the risk of ...
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How to monitor the health of a relay and its contacts
I have a challenge and hope someone has and idea how to solve it.
I want to monitor the health of a relay by monitoring the state of relay contacts in relation with the state of the coil. I want to ...
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Relay coil with zener diode having Vz>Vcoil: how to drive coil?
Short question:
How to drive a relay when using diode + zener across the coil (for fast demagnetization) but the zener voltage is greater than the drive voltage?
Long question:
When driving a relay (...
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Reliable and safe power relay (1500W, 7A) - advice needed
I need advice for choosing a reliable & super-safe (won't catch fire, contacts won't weld) relay.
Use case: temeperature control system, switching 1500W electric heaters (resistive), 230 VAC, 6-7 ...
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What alternative is there to using relays to switch 3 to 6 VDC power line with unknown (don't care) polarity?
I am looking to build a Halloween prop controller that utilizes the prop's "try me" port as a trigger. They all (for the most part) use one of two types of connectors, but I do not know if ...
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Is this a reasonable way to use a logic level signal to switch a load with a larger power supply?
I am trying to switch 9 V to a load with a logic level signal from a microcontroller. The microcontroller has a separate voltage source from the 9 V. I am not sure where I should put a flyback diode ...
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12V Automotive Control with 5V Logic
Background
I'm working on a personal project to control auxiliary lights on the front of a car. The lights themselves are powered directly from the battery, and are switched on using standard ...
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Relay issue not switching
Any idea why this relay doesn't switch?
Falstad simulation
Note that all R values are arbitrary - does this have to do with anything?
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How to wire multiple laser controllers if one has a single interlock mechanism
My background is in optical engineering, and I have limited knowledge of electronics.
I have a microscope that has an interlock for the eyepiece. There's a button on the microscope to toggle between ...
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Designing a circuit for Lego Motor
I need some help with a DIY circuit. My son has created a mashup of a small R/C car, and a Lego car, to create a car with the front/steering of a R/C car powered by a 3.5 volt battery. The rear ...
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Comparator control circuit
I’m new to EE, I’m a machinery mechanic.
I want to design a hydraulic oil radiator fan circuit by using a built-in temperature sensor. The sensor have 3-wire 24 V GND and signal wire. The signal wire ...
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Relay switching problem when load is connected
I'm using PIC16F18346 controller for relay switching. When the load is not connected relay is switching properly, no toggling or any other problem.
When the load is connected, after some press relay ...
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28 VDC 1.5A, 0.5A when fully charged, how can create a low current cutoff relay?
I have a 28VDC power supply charging 2 separate devices. Where the supply is turned on manually. Once activated, the 2 devices will start pulling 1.5A EACH. The current slowly drops until it is ...
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Relay kickback causing ESP32 to restart
I have an esp32 connected to a 12V circuit. This circuit is supplied by two 12V lead-acid batteries in parallel. The circuit controls a Solenoid using a 12v double pole, double throw relay. This ...
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Hybrid Relay- reverse Engineering [closed]
I want to design a hybrid relay for a three phase motor. The rating is 230VAC L-N @20A. In order to get a better idea, I ordered this hybrid motor starter.
It is also a 3 phase hybrid motor starter ...
