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- We delivering products that are designed to elevate your projects to the next level. Whether you are a hardware engineer,hobbyist, student, or professional.
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- Welcome to JESSINIE, for development boards and electronic components.
- At JESSINIE, we providing a wide range of development board modules, displays, sensors, electronics, power accessories, and DIP sockets to meet your project needs.
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- Product parameters
- Power supply level: 3-5V (TTL)
- PLC electrical level: available 24V level
- Terminal: Blue 2P 5.0 terminal
- 3P terminal interface: MCU input
- Board size: 72mm x 5mm
- Note: When using the module, it should be placed in a dry and ventilated environment
with insulation protection, and should pay attention to electrical safety
Customer
2025-09-03 13:27:29
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.
Jasem Mutlaq
2025-08-13 18:56:03
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
2025-08-01 11:12:19
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.
Brian W.
2025-05-04 11:43:08
Hooked one up through what I thought was a dry contact switch, it kept indicating there was power even though the switch was off! I figured out that since the switch was illuminated, that leaked a tiny amount of current through the switch. So good module, quite sensitive.
MV
2025-04-23 17:50:44
The media could not be loaded.
tom
2025-04-15 18:58:40
They works with 24VAC using a 4.7K 2W resistor piggy-backed onto the existing 100K 2W resistor, so to lower the VAC input, just piggyback a lower ohm'age resistor. Using this to monitor the 24VAC of my thermostat connected to Arduino UNO; connected to white wire (heat) and C-wire (common). Unfortunately, the 1 channel version is MISSING the red LED like is used on the 3 channel versions!
JBurdman7
2025-04-04 13:13:19
Arrive in a branded bag which does not strike me as being anti-staticWith a VCC of 5V:I found that the output was high (5V) with no inputWith 35VAC on the input the output was 2.5VAt 60VAC input the output dropped to under 200mV (off)The circuit has an unused Zener on the high voltage side, yet the circuit could use a Zener in the case of using 24VCC to cap the output V to 5V so as to operate TTL without the magic smoke on the low voltage side. Had someone Ok'ed the addition of a Zener and someone placed it on the wrong side of the circuit perhaps? Who knows.Nice to see TH parts for easy tweaking
Fred
2025-01-27 17:48:27
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.
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