A solid-state relay (SSR) is a switching device that accepts a small control signal to control a larger load current and/or voltage. In many ways they perform the same function as an electromechanical relay without any moving parts, they have many advantages but also some disadvantages compared to a ...
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2answers
58 views
Calculate minimum voltage to turn off/on solid state relay
I have an AQZ204 AC/DC type solid state relay AQZA204 datasheet
Basically I want to calculate the minimum supply voltage required to turn the relay on
and the minimum supply voltage required to turn ...
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1answer
30 views
AQZ204 Solid state relay
I have an AQZ204 AC/DC type solid state relay AQZA204 datasheet
I'm using 31.5 volt DC supply, with a series 4.7k Ohm Resistor to the input LED of the relay.
The data sheet is a little confusing to ...
0
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1answer
45 views
Measuring small Off state leakage current 10uA or less
I have a solid state relay an AQZ207 to be exact. I want to be able to measure the off state leakage current of the FET which in the datasheet seems to around 10uA Max. I had some ideas, but not sure ...
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0answers
34 views
AC to AC solid state relay quick question
Quick question about AC to AC SSR such as this one:
"Solid State Module Relay 80-250V AC 24-380V AC" (from amazon)
does an AC to AC SSR mean that if the control side has any AC going through it, the ...
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0answers
44 views
Solid state relay not working as expected
I am using a PID temp. controller with 11 vdc output to a Fotek SSR-25 DA to control a fan. When DC power to relay is on the LED lights but I get no continuity across the AC N/C contacts.If I put 120 ...
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1answer
50 views
Does a photo-coupled SSR need a series resistor for the internal LED?
I am trying to control an LCA710 SSR with an Arduino digital output. The data sheet says the control inputs are "CMOS and TTL compatible". It also has a schematic of the internals of the chip, showing ...
2
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2answers
67 views
Help with picking solid state relay
I am looking into a solid state relay to solve my problem here. I think I have found something that might work, but I am a little concerned as to weather it will work bidirectionally (I need DC ...
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1answer
168 views
Circuit to drive a Solid State Relay
I am looking to use an SSR on an Arduino board (5v logic) to control a standard 120v light bulb.
I've heard people say you can "just drive this from a logic pin" - but the datasheets on the SSRs ...
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2answers
341 views
SainSmart 5V 4 Channel Relay momentary switch
Hey all i am wanting to hook this relay up here:
What i am wanting it to be hooked to (output) is the pwr and reset switch on a PC motherboard to act as a momentary switch:
I am also wanting to ...
1
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1answer
176 views
Driving EL wire from button push on a gamepad
I have a homemade arcade controller which uses a USB gamepad board. I would like to add some EL wire to it such that when a specific gamepad button is pushed it lights up the EL wire.
The Gamepad ...
0
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1answer
139 views
Solid State Switch for magnet DC Generator
I'm using a flywheel-driven permanent magnet DC generator to charge up a bank of supercapacitors, 35 farad rated to 25V. For safety I limit the max charge to 22V via a comparator and a zener ...
5
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3answers
279 views
An opto-coupler/triac oddity — is it a problem, and is there a solution?
I'm using VO2223A opto-coupler/phototriacs to drive some low-current mains lighting with a PIC controller. All are working fine, but when the (DPST) mains switch is first turned on during system ...
2
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2answers
156 views
Controlling the Power of a Solenoid
I am trying to control the force of a solenoid. My current system has a bank of capacitors connected to a relay. In order to control the force (how hard I am trying to hit the object) I am increasing ...
1
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1answer
362 views
Wiring SSR with Arduino
I'm attempting to adapt a project with the wiring diagram shown here:
http://www.glacialwanderer.com/hobbyrobotics/?p=9
But instead of the electromechanical relay used in the above link, I'm using ...
4
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2answers
94 views
Electromechanical Relay for VAC switching
I'm looking at PID devices for coffee machines. There's a tendency to use SSRs (for the regular reasons) but at the current levels (12 amps 120VAC) required these tend to be large (60mm longest ...
6
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4answers
639 views
How to cut power off when a certain voltage from a sensor is reached?
I've built a simple Ni-Cd charger (basically a 0.1C current source) for some 1300mAh cells, that I want to stop when a certain voltage is reached on the cell. I tried to design the switch with an Op ...
2
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1answer
109 views
VO2223A datasheet query — pin 5
This is a follow-up to a previous question, regarding the VO2223A opto-coupler/Phototriac. My understanding of the chip is that the IR LED triggers a phototriac, which in turn drives the gate of a ...
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1answer
203 views
Using the VO2223A to switch a 230Vac LED lamp
I'm looking for something that can switch on and off a 230 Vac, 26mA LED lamp, under microcontroller control. Would a VO2223A, driven by (say) a PIC or Arduino, work as a low-current SSR? The load ...
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0answers
82 views
Are both of my SSRs broken or am I doing something wrong?
I have one side of a 125VAC panel-mount indicator connected to the AC load points of a solid state relay. The control points are hooked to a microcontroller with a basic program that switches the ...
4
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2answers
335 views
Can I use a DC SSR that is switched by a PID controller to control the speed of a 12 V DC fan?
This is my first post here. Let me start by saying that I do not have an engineering background. I tinker with electronics in my spare time (Arduino, solid state low-power guitar amps, etc.), but I do ...
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3answers
152 views
Problem with high voltage in a project
I have a circuit that should be protected from high voltage. Is there any component other than a fuse that I don't have to change every time? Something like a switch that activates only when high ...
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2answers
442 views
Do I need a flyback diode?
I have some experience using automotive relays and triggering them using the output from a two-way radio aux pin so I am aware of the need to add a diode in parallel with the coil to protect the ...
4
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1answer
232 views
Solid state relay for home lights application
My application is controlling home lights. I want to use relays to switch lights on and off. My circuit should work on all kind of lights such as neon lights, halogen lights, strobe lights and others. ...
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1answer
183 views
Why do they add a TRIAC after an MCP3020 optocoupler?
I have a relay circuit (I use it instead of a relay) that uses a MCP3020, which I think does the physical separation of the two circuits (it's a LED and a photo cell inside a chip) and a BTA08 TRIAC.
...
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1answer
100 views
How to choose an external powersource with electronic logic [closed]
I am a n00b in electronics (software developer)
I have 2 batteries bat1, bat2 (1.5 volts) available to me. I can only use one battery in my circuit. Let's say that if the battery is put in a holder ...
2
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3answers
215 views
Is it OK to run a signal junction at a “do not use” pin on a solid state relay DIP package?
I am attempting to retrofit an LCA710 solid state relay into an exiting PCB that has a mechanical relay. I will need to cut some traces and run some fly wires, but there is one IO line that would ...
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1answer
119 views
Using a solid state relay/ photoMOS relay [closed]
I'm trying to use solid state relay (Panasonic's AQY277 / AQV215) to switch a light bulb (100 V AC). To control the input, I'm using a signal generator in DC mode with 5 V as input. I have not yet ...
1
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1answer
190 views
Simple AC line state detection for digital controller input
Last year I moved into a house that has an old ('50s-'70s vintage) GE low voltage lighting control system. It uses 24VAC momentary wall switches to toggle solenoid/latch relays that feed 12 main ...
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1answer
47 views
Routing Current to Many Individual Channels [duplicate]
Possible Duplicate:
How to implement an isolated connection matrix
I need to put current on up to 30 lines; one at a time. What kind of electronics solutions are there to this kind of ...
2
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1answer
148 views
From a power consumption point of view, which should I use: SSR or Relay?
I'd like to find out which to use: a SSR (Solid State Relay) using TRIAC and optocoupler or a relay.
My consideration are from the point of power consumed, my challenge here is to choose the less ...
5
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1answer
316 views
Can i use a SSR for switching a fluorescent light?
Can I use a SSR for switching a fluorescent light on or off? Specifically, can the SSR last for a long time, and can it withstand a very large number of on/off switchings? I would also appreciate a ...
3
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1answer
112 views
Solid State Relay Question
The solid state relay board functions normally by shorting + to input, but latches closed on device side of the relay until load is turned off or is disconnected.
Is this normal for solid state relays ...
2
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1answer
316 views
AC-mains capable SSR (Solid State Relay) with very low leakage current?
Requirements:
Can switch 230VAC
Can switch at least 0.5A (i.e. ol' good 100W incandescent lamp)
Wastes no more than 3mW in off state
Low-on resistance is always good too
The stated power usage ...
5
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1answer
263 views
SSR staying on (not reacting anymore)
I am using this SSR connected to an Arudino.
I am running a very simple code similar to this one: (like the Blink example)
...
1
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1answer
1k views
Cannot get Sainsmart 8 Channel SSR board to turn on sprinkler's 24 V solenoid
I purchase a Sainsmart 8 Channel Solid State Relay board to control an 8 zone sprinkler system via an Arduino Duemilanove w/ ATmeg168. The SSR's LED lights up but my solenoids do not activate at all.
...
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1answer
931 views
How to connect 8 Channel 5V Solid State Relay Module Board and OMRON SSR 4 PIC ARM AVR DSP Arduino
I have purchased a 8 Channel 5V Solid State Relay Module Board.OMRON SSR 4 PIC ARM AVR DSP Arduino, from your Amazon bargains site. I am wondering if there is a diagram to connect this up. On the ...
4
votes
1answer
883 views
Switching a 3 phase pump using a solid state relay
I made a remote (GSM) controlled module for a 3 phase pump close to my friends house. The pump should run at night, and walking the 1km to the switch while they are sleeping is the problem.
The ...
3
votes
4answers
3k views
Optocoupler/relay type for isolating two DC circuits
I have recently started experimenting with an Arduino and would like to control a seperate circuit (for example, a small and cheap digital video camera powered by battery) from my arduino.
Basically ...
4
votes
6answers
4k views
How do I get proportional 240V AC output from an Arduino-based PID controller to “dim” a rice cooker for a Sous-Vide project?
I'm making a PID controller for Sous-Vide, using an Arduino.
I'm trying to decide how to control the output. Using an SSR as an on-off switch on 240V AC will probably give me the result I'm looking ...
1
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1answer
115 views
If I made an h bridge out of silicon controlled switches, would I still need a driver?
My question is relatively simple. If I arraged four silicon controled swithces, like the one here, to form an h bridge, could I drive it directly from the logic level? Since only gate to gate voltage ...
5
votes
5answers
2k views
What would a professional use to switch sprinkler solenoids?
As evidenced by several previous questions of mine, I'm working a project to design a sprinkler controller. This involves driving one of 16 solenoids (well, probably only one at a time...) based on a ...
1
vote
2answers
542 views
1.8v GPIO controlling 5v 10mA solid state relay
I have a Crouzet 84 134 900 solid state relay that I need to control with a 1,8V GPIO output from a Gumstix Overo Summit expansion board. I've tried the circuit drawn up for me in this answer, however ...
1
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1answer
472 views
Silicon Controlled Switches: applications&suppliers
I came across this description of what are called "silicon controlled switches." I always look to balance n/p-channel electronics for stability, and using these silicon controlled switches seemed like ...
2
votes
2answers
192 views
Is this part (given picture) an EM relay, relay-controller, snubber?
Here is a rather bad (low resolution, grainy) picture of a circuit board that claims to be a 2-channel 315MHz ASK/OOK type remote controlled relay set. I can identify the relays, but not the big blue ...
5
votes
2answers
755 views
Transistors: why are resistors needed?
I have a solid state relay which needs at least 3V to activate, and I need to toggle with a 2.3V output from a microcontroller. I've also got a 6V 1A power supply which I can use to power the relay.
...
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1answer
390 views
HSR412 (solid state relay) parallel circuit connection not working?
So I got some HSR412s and connected them to my Christmas lights in a serial circuit. It worked great and as expected except for one caveat.... It was getting really hot. I realized I was putting ...
3
votes
3answers
2k views
SSR vs optocoupler with TRIAC output
I've designed (and mostly implemented, now) a system for turning on and off 24VAC solenoids. In order to achieve this, I used optocouplers with TRIAC output (Sharp PR26MF1xNSZ series). The datasheet ...
9
votes
3answers
2k views
Equivalent circuit of a solid state relay
I want to switch 50V AC voltage. Maximum drained current will be 5A. Frequency is 50Hz. Switching speed is not important, can be real slow, it is not a problem in my application.
I wanted to use ...
4
votes
2answers
2k views
What is a phase difference between voltage and current?
I was reading the question here with some interest, because I am in the end stages of construction on a project that involves 16 solid-state relays. I'm using non-zero crossing type, because that's ...
4
votes
4answers
1k views
Is this a proper use of a PNP transistor?
I'm attempting to use a transistor to switch on and off an SSR, which in turns switches on and off a solenoid. I originally used an NPN transistor (2N222), but this caused problems when the MCU ...
