🔌 SunFounder 5V 8 Channel Relay Shield Module: Compatible with Arduino R3, Raspberry Pi 3, 2 Model B & B+ Review

works with my fake Arduino. Looks solid, both relays work fine. The clamps hold the 14ga single wire super tight, but probably can't open and close them much more without stripping some insulation. When the input goes low (<0.6V), the relay turns on and the LED lights up. This was counterintuitive at first, and requires your controller to signal "high" for the entire time you want the device to turn off. So for a lamp that turns on 15 minutes a day, I'm providing a "high" 5V signal for 23.25

Description says 20mA per relay but I measure 60mA per relay (JDVcc/5V side only - I use 3.3V for the control side). The pass on the relay says 90 mA each (at a full 5 volts, which you probably won't see in practice). 160mA you mean. Also, the relay jitters when my NodeMCU turns on (partly a problem with the NodeMCU and partly because the relay inputs are inverted), so I added a high-side power switch controlled by one of several stable GPIO pins which allow me to turn off the relay side of the

It looks like the manufacturer made a mistake in the product description. I was concerned about my RPi's reverse current because the description says it's 15-20mA. According to the internet, most Raspberry Pi boards are only rated for 16mA per GPIO pin (and only 50mA for all pins). It looks like both my boards (2 and 4 relays) use 2.2kΩ resistors on either side of the optocoupler. I have measured that 1.65-1.85mA is being fed back into my Pi when the GPIO pin goes low. I would recommend using a

4 stars for: no documentation, overall good build quality and good price. Would buy again. A good product for quick use to turn on/off a simple load with a PIC microcontroller. Note that a 0V/GND signal on any input on the relay board will energize/activate the relay, while a 5V signal will de-energize the relay. The relays are listed for 30VDC / 125-250VAC, both 10A, but I've never been familiar with tiny screw terminals of this magnitude. The board has a set of "VCC/GND" jumpers. I believe…

This I think has a fatal error that most will find similar. You would think that if you send 5V to a relay it would turn the relay on, but the opposite is true. Applying 5V to the relay opens it, otherwise it closes. So if you want to turn something on for the hour/day, you have to turn on the relay for 23 hours if you don't want to turn it on. Using this with a solar application means you are draining the battery at night when there is no sun as you have to send 5V to keep the relay open. The…

This module is perfect! It is soldered and has screw terminals. Like almost all relays of this type, it cannot handle more than 10 A. In the rest of the world this will not be a problem since 230 V circuit breakers work with 10 A. However, in North America with 15A and 20A circuits, this will not work. This limits you to devices with 1200W or less. My first project with him was a plant watering system. The pump only requires 4-12 volts and probably a few hundred milliamps. BTW if you want to…