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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157 views

How to wire this relay (silkscreen in Chinese!)?

I have the following relay and am unsure of how to wire it since the silkscreen is in Chinese :-/ Datasheet. I'm finding the datasheet difficult to interpret, but from playing around with my ...
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1answer
52 views

Arduino SSR 5V DC (Mager GJ-3FA-L)

I just noticed this SSR that was for DCV instead of all the others that are normally for AC. Although I can not find the datasheet for it, it does seem compatible with Arduino. eBay auction site ...
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1answer
44 views

Does low frequency PWM create reactive power in a transformer?

I got a 350VA transformer (230V~/24V~) which is directly connected to a heating unit at it's 24 V ends. The 230V end of the transformer are connected to 230 V~ mains over a solid state relay (SSR). ...
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2answers
47 views

5v contact closure SSR?

I want to have a contact open/closed when a USB port is powered on or off. When monitoring the USB port with a multimeter it takes >1 minute for the voltage to drop from 5v to zero. What is a simple ...
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2answers
85 views

Solid State Relay “fading” instead of dropping secondary voltage

I am using a (rather cheap-ish) chinese solid state relay (ssr) with 5V DC on the driving, 230V AV on the driven side (there's an ATtiny85 randomly letting devices run for 10-30 minutes, then cuts the ...
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2answers
112 views

Violation operating temperature

I have a problem on my current project. Relays are failing in Cold temperature. I am using a relay which has an operating temperature +85C to -25C to PCB. And my device under test is at -40C. Can ...
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2answers
84 views

Is there such a thing as a wireless solid state relay

I want to control multiple baseboard heaters in my house, but I don't want to put a raspberry pi connected to a solid state relay behind each baseboard heater, or even connect it to the thermostat, as ...
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2answers
118 views

Amplifying Small Signal With Solid State Relay

I am trying to control an electromagnet with a signal from a small microcontroller (a BeagleBone Black). Obviously, I need to amplify the signal. I have a lead from a power source that I want to pass ...
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1answer
41 views

SSR function con control panel

I'm new in electronics and would like to build an electric brewery with an electronic control panel. I found on www.instructables.com one control panel and is described as in following image. Could ...
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3answers
94 views

Can pwm pulse damage High Side Solid State relay IC ,driving Bulbs as load

I am driving a 12V, 10W Bulb and 12V, 5W Bulb (parallel connected) on one channel of high side driver solid state relay IC. For dimming effect, Bulbs are driven by PWM (Intial 3msec) then continuously ...
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2answers
92 views

Reducing voltage for solid state relay

I have a solid state relay which wants a 1.25-2.5V "activation" input, but my output from the micro controller is 5V. Is it possible to use a zener diode for this? Or do I need a buck converter? I ...
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1answer
107 views

Convert mechanical relay to solid state relay

I've been searching forums for a while trying to figure out exactly how to do this. I want the same functionality that a mechanical relay does. When the "coils" are de-energized, I want the 'heel' ...
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49 views

Minimizing voltage drop across SSR when using it to pull down a TTL digital input on another device?

I have a situation that I've run into a few times. I have a digital output card in my system that uses SSRs. I'm trying to interface to a device (referred to as my DUT from here on) that has TTL ...
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2answers
116 views

COM port goes down unexpectedly, but Arduino Leonardo keeps running

I am observing strange behavior with my Leonardo board. I use 9V AC/DC adapter to power it. Relay extension board is attached to digital pins, and relays are used to control several valves and ...
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1answer
167 views

controlling heating element using microcontroller

I have a 3000 Watt, 240 VAC heating element. (This is the heating element in a commercial espresso machine.) I want to use a micro controller to turn power to machine on and off. it has a pressure ...
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0answers
286 views

Can You Drive Back-To-Back MOSFETs (aka a Solid State Relay) Without Using An Optocoupler?

I was wondering if there was any way of driving back-to-back MOSFETs (with their sources and gates tied together as shown in the following image) without using an optocoupler? The reason is that ...
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1answer
145 views

Using Solid State Relay board for wired low-voltage switch activates AC outlets

pardon the noob question (though I have a EE degree back in the day, it's been a long time). Let me ask this simply, then explain my use case below. I am wanting to use several existing CAT5 cables ...
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53 views

Solid state relay voltage ratings — how to choose?

I am trying to control mains power, which around here is 220VAC @50HZ. Should I be using a SSR that's rated for 24-280VAC (Load), or one that is rated for 48-480VAC? The reason I'm asking is because ...
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0answers
94 views

Missing phase 3-quadrant TRIAC-based solid state relay for 3-phase engine

First of all, I'm a simple mechatronics technician student first time posting here, so please don't mind if I say something that seems completely stupid, since I consider myself to be a total newbie ...
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1answer
189 views

Replace thermostat with rasberry pi and Solid state relay

I want to replace my thermostat with raspberry pi board. I have already connected solid state relay to rasberry pi and it works just fine. The only part left to do is to connect solid state relay to ...
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3answers
86 views

Safety relay toggle time

I am currently working with software for a safety relay and during my work I started to think about how much time it takes for a relay to switch. The relay and it's data sheet I am using can be found ...
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0answers
131 views

How to select gate and gate-source resistors and N-MOSFET for controlling a 5V load from 3.3V input?

I want to control a 5V valve from my BeagleBone Black. As a single GPIO port only has 3.3V with 8mA I cannot use common relays. I found this thread: how to use a 3v output to control a 5v relay ...
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1answer
168 views

Using Arduino Uno R3 + Ethernet Module, how to control current pass to Lamps?

I have Arduino Uno R3 and Arduino Ethernet Shield V5. What's missing in order to control 6+ lights (bulbs) from my home? Those are connected to 220V AC. My idea is to send a packet via ethernet that ...
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2answers
232 views

LCA717 SSR connected to Arduino Digital Pin

I am trying to figure out how to go about using this LCA717 SPST-NO relay in my project. I will be sending 12V (car voltage) to a radar detector and I want to be able to turn it on/off whenever via ...
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2answers
143 views

MOSFET Relay (G3VM-21AR/DR) connected to Arduino Digital Pin

I am trying to figure out how to go about using this Omron MOSFET relay in my project. I will be sending 12V (car voltage) to a radar detector and I want to be able to turn it on/off whenever via the ...
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0answers
109 views

Triac substitute for BTA12 600TW?

Can I safely use a Triac at a higher specification than designed? e.g. for a BTA12 600TW, could I safely use a BTA18 800TW i.e. where the volt & amp values are larger than the spec?Thanks for any ...
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1answer
57 views

Choosing proper heat sink for a high power relay

I'm using this Solid-State-Relay to transfer 350 Watt: Input: 45VDC x 10A Output: 10VDC x 10A The following is derived from it's data sheet: Maximum junction temperature 150 C Junction to ...
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2answers
98 views

Should I have to include photocoupler in SSR application circuit?

I'm designing simple circuit for ssr control. I reviewed some sort of related circuits and previous version of the product(our company's) Many of them are including photocoupler before S.S.R. ...
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1answer
77 views

controlling 2 kw,230v- infra red short wave heaters using electronic device

i want to control infra red short wave heaters 230v,2kw, with some electronic device, it is an open loop system,where i want to give analog signal to heater from 0 to 100% . i cant take Thermocouple ...
3
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2answers
165 views

Is it safe to control a solid state relay from the MCU output?

I have a +/-30V and +5V signal. I would like to rout this two signal by using the CPC1106N and CPC1006N solid state relay. According to the Absolute Maximum Ratings of the Input Control Current 50mA, ...
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1answer
116 views

Do all Solid State Relays function as diodes?

I just installed a solid state relay as the main power switch for a robot I'm working on. The robot is controlled by a Windows 8 tablet and I thought it would be cool to use the tablet to turn the ...
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1answer
1k views

Any obvious problems with this DIY home automation?

I'd like to know if anyone can spot any serious electrical issues in what I'm trying to do from an electrical viewpoint. Youtube Demo http://www.youtube.com/watch?v=BmsdXMbd2vo Short version: I ...
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2answers
261 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
45 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 ...
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1answer
249 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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62 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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1answer
157 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 ...
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2answers
161 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
1k 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
830 views

SainSmart 5V 4 Channel Relay momentary switch

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 hook one ...
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1answer
346 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 ...
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1answer
327 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 ...
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3answers
556 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
275 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
878 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 ...
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2answers
135 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 ...
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4answers
2k 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 ...
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1answer
136 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
410 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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110 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 ...