Timeline for Do I have a bad relay module?
Current License: CC BY-SA 3.0
19 events
| when toggle format | what | by | license | comment | |
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| Jul 2, 2020 at 21:26 | history | protected | Voltage Spike♦ | ||
| Jul 2, 2020 at 20:36 | comment | added | Altoids Lover | Thanks @John6of6 for this answer! I was about to throw my 4 channel relay board out, because I thought for sure it wasn't working (a SainSmart 4-Channel 5V Relay Module, Model# 1892a). The thing is I wasn't testing from an Arduino, or a Pi. I was waiting for a Pi image to finish burning to an SD card, and in the meantime wanted to test the functionality of the relay board. So, I hooked it up to my breadboard and applied 5 volts to relay signal pins. Nothing lit up, and nothing clicked. It wasn't until I saw your post above and then tried applying ground to the signal pins that the relays began | |
| Oct 10, 2019 at 14:30 | review | Close votes | |||
| Oct 15, 2019 at 3:05 | |||||
| Dec 23, 2018 at 9:27 | answer | added | Babuatigerua | timeline score: 0 | |
| Dec 7, 2017 at 17:59 | answer | added | John6of6 | timeline score: 3 | |
| Nov 7, 2013 at 20:54 | answer | added | Passerby | timeline score: 3 | |
| Nov 7, 2013 at 20:13 | answer | added | mikeY | timeline score: 0 | |
| Nov 7, 2013 at 18:26 | comment | added | jippie | Only if it worked before that. You have to check conductivity for every header pins to the related component on the module with an ohmmeter. Make sure if you go out to buy a multimeter it has a resistance / ohm range. It may very well be that you pulled out a via or damaged a track. | |
| Nov 7, 2013 at 18:10 | comment | added | Alfo | No, it doesn't. I unsoldered the male headers and soldered on female ones - might that be the problem? | |
| Nov 7, 2013 at 17:54 | comment | added | Ignacio Vazquez-Abrams | Do you hear anything if you connect GND directly to an input on the relay module? | |
| Nov 7, 2013 at 17:54 | comment | added | jippie | Anyways, if the LED on the relay module doesn't blink, then it is either missing +5V or missing the Arduino input. | |
| Nov 7, 2013 at 17:53 | comment | added | jippie | You should really consider buying a multimeter, they come extremely cheap up to extremely expensive and basically you get what you pay for. If you are unsure if you want to spend much and just want to use it for small signal stuff, buy one for €10 at the local hardware shop. If you want a decent one you'll have to spend somewhere around €100, those are safer and more accurate. | |
| Nov 7, 2013 at 17:48 | comment | added | jippie | Can you upload a picture of the set up? Also here is the circuit diagram: i.sstatic.net/WyvKY.jpg | |
| Nov 7, 2013 at 17:44 | comment | added | Alfo | The LED on the Arduino does, but the one on the relay module doesn't. | |
| Nov 7, 2013 at 17:42 | comment | added | jippie | Does the LED on Arduino blink? Does the LED on the relay module blink? | |
| Nov 7, 2013 at 17:39 | comment | added | Alfo | And I'm afraid I don't have a multimeter. | |
| Nov 7, 2013 at 17:38 | comment | added | Alfo | It's 05VDC-SL-C | |
| Nov 7, 2013 at 17:36 | comment | added | jippie | What does the print on the relay itself say? What's before the VDC? Do you have a multimeter to check the voltages on the module? | |
| Nov 7, 2013 at 17:30 | history | asked | Alfo | CC BY-SA 3.0 |
