![]() ![]() rolesville football schedule soccer tough pdf. ![]() Overview LC 8 channel Modbus relay module equipped with mature and. You can see I've set the GPIO for relay 4 high, but the LED's on relays 2, 5 & 6 are dimly lit. Modbus RTU 8 channel relay module RS485/TTL UART 8 channel input 8 channel output. Is my relay board a dud? If so, any recommendations for a sub $100 alternative?Ī photo of the setup. Is this an issue with the GPIO pins only supplying 3.3v? My understanding is that the relay blocks themselves are powered by the separate 12v supply, and the 3.3v is just used to switch the optocouplers. I tried setting the GPIO mode to down rather than out to see if this made any difference, but still the same behavior. Please Note that Connect the VCC to JD-VCC with the jumper when using. If I then set another pin to high, activating a second relay, all 6 of the connected relays pop on! There are also the 2-Channel Relay Module and 4-Channel Relay Module for your option. There is no voltage between the inputs for these other relays and the Pi's ground, and also the relays have not switched. But, as you can see from the photo below, some of the other relay LED's also light dimly. If I set a single pin to high, then the LED for that pin turns on, and the relay does switch on. Currently the switching side of the relays has no voltage.Īfter hunting high and low I cannot find a datasheet for the cheap Chinese board, but I think it's one of these. I have a relay module connected to 6 RPI GPIO pins and a 12vdc power source. ![]()
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