No hay artículos en el carro
No hay artículos en el carroCustomer
Comentado en los Estados Unidos el 6 de marzo de 2025
Works as described - as a voltage detector. Very sensitive. An input voltage of just 20 VAC is enough to turn on the optocoupler and trigger an input on my Arduino Uno. Also note the full-wave rectifier and capacitor on this device. It rectifies and filters the input before the optocoupler. That means this cannot be used as a zero-crossing detector. It also means that there is a slight delay between application and removal of voltage and the switching of the optocoupler, since the input resistor and the filter capacitor form an RC circuit.
Sunny
Comentado en los Estados Unidos el 13 de marzo de 2025
Not as pictured. the 3 items are not separate they are on a single board and must be carefully cut from each other.
Jasem Mutlaq
Comentado en los Estados Unidos el 25 de julio de 2024
I tried connecting it to 3.3v from Raspberry PI but the ON signal was never above 1V and therefore Raspberry PI considered it to be LOW still. Only by using 5v input I was able to get just above 2v that was reliable to act as a digital on/off signal.
Anton
Comentado en los Estados Unidos el 15 de diciembre de 2024
I'm using this module to read in the 120V off of a relay that turns on the drum motor in my clothes dryer. I had to use a resistor to bring the lower voltage sending threshold up, like it was suggested by another rlreviewer here (thank you kind sir). Overall the thing works exactly as I expected.
Fred
Comentado en Canadá el 8 de septiembre de 2024
Product works well. Soldering is better than mine 😊. It is NOT a take any ac voltage and spit out a dc signal universal device. As noted by another reviewer you may need to change (or wire another in serial) the ac resistor to suit your needs. I had an input of 20 V ac and changed the 150k resistor to closer to 1k. Miracously the led lit up and my life was wonderful. The capacitor size seems to vary. The mysterious unused component still exists. Easy to change the opto sensitivity by changing the dc side resistor.
Productos recomendados