Richard Gagliardo
Reviewed in the United States on August 4, 2024
The 4 channel relays work as advertised. While the pictures indicate that the module can be driven directly from an Arduino board, make sure it can source that much current on the 5V input.A typical Arduino Mega can provide a maximum of about 1W on it's internal 5V supply, which translates to about 200mA. But when all 4 relays are turned on, the 5V draw is about 280mA.Recommend that an inexpensive (external) DC to DC supply is used to provide the 5V to the relays instead of the Arduino board as was shown. Note that the relay board even has a pin which can be used to provide that external power once the jumper is removed.Gave it 5 stars though because it works just fine. Good value for the cost.
day_tripper
Reviewed in the United States on February 26, 2024
Great relay modules using industry standard components. These are what SainSmart used to carry but they no longer list dual relay modules. Given the price for this, I think I understand why. I had actually looked there first, noted they don't sell them any more, then hit AMZ and found them here.I have modules from both sources and these are exactly the same - same pcbs, same components, same placement, etc. Good stuff!
Tom in St. Charles MO
Reviewed in the United States on February 17, 2024
I would have given it a 5-star review if there was better documentation.The onboard jumper didn't seem to make any difference if it was attached or removed.The inputs IN1 and IN2 must be pulled low (to ground) in order to activate the relays.When the relays are energized, the associated onboard LEDs will light up.The VCC needs to be 5 VDC. Based on the spec sheet of the relays, it could handle up to 6 VDC at the 120 percent maximum voltage limit. The coil on each relay measured 66 ohms. My USB power supply measured 5.45 VDC. The current draw of the inputs was 2.5 mA each. The current draw on the board with one relay on was 80 mA. With both inputs on was 150 mA.
T-Bish
Reviewed in the United States on December 24, 2024
Stays cool under 24v 6 amp power draws. I use this to raise and lower a chain at the end of my driveway using an actuator and this PCB allows me to Extend and Retract the actuator, ie essentially reversing the circuit with an arduino uno and some code. I key off the 24v power supply in my Driveway Gate Controller further down the driveway. Gate opens, chain drops and vice-versa. Since this is in the Virgin Islands, heat tolerance is paramount.
Joseph Sapp
Reviewed in the United States on November 16, 2024
No issues.
DigitalFan
Reviewed in the United States on January 9, 2024
Great value for a quality product. Just note that there is no separate ground pin for JD-VCC so if you are using an a separate power supply for the high power side of the realy then you have to use the common ground pin on the low power side.
justaguy
Reviewed in the United States on January 19, 2024
Only used one of the 4 i received but it works as it should
FBeattysk8
Reviewed in the United States on August 16, 2023
Used these to set up some sequential triggers for consumer pyrotechnics. Works well!