🔧 Elevate Your Projects with Precision Control!
The R REIFENG 6pcs/lot 1 Channel 12V Relay Module Board Shield is engineered for versatility and reliability, featuring high/low level trigger options, robust load handling capabilities, and user-friendly design, making it an essential tool for any tech-savvy professional.
B**N
1 of 4 was DOA.
One was not working from the start. The others seem good.
J**S
Selectable Hi-Lo 5 Volt relay - schematic
The opto-isolator has nothing to do with isolation, but it is a clever way to provide the option of driving the relay with a Hi signal or a Lo signal ... something which is probably not really needed if you're driving it from software of a microcontroller. A simpler design would just use a 2n2222 MosFet, a 1 K resistor, the flyback diode and the relay, and it would draw less current from the microcontroller , but it'd cost you more just for the relay! ... you can't beat the price, and the size of the unit is mostly occupied by the relay so reducing the component count by a little wouldn't make much difference.
J**Z
Great value
Would buy again. Great product
F**R
ok
ok
M**C
Work great
These work great to switch a 120v from a 12v trigger.
C**N
Worked well.
Used this to support an escape room project. Worked well. Was not clear what high (voltage) and low(v) were, but figured it out.
B**D
Works well
Easy to install, versatile for fair price
S**Y
These are relays!!!
Each one is packed like a candy in a wrapper :) Nice relays, easy to use. Its a steal at this price!!
Trustpilot
1 month ago
3 weeks ago