Hallo
I bought Velleman VM110 from this supplier:
conrad.de/ce/de/product/1911 … -Ueber-USB
My final objective is to connect the digital output board with 12 Volt relay.
Thus, I can control the relay from my PC.
I have already tried the demo program.
The LED Digital output seems work fine.
However, the voltage digital output pin (Green pin header) is very strange.
For example: if I set all digital high, some of pin has voltage high around 0 - 0.58 V and the rests are 0 V.
If I set all low, then every pin has voltage 0 V (GND)
My question is why the output voltage is extremely low (0,58 V even less) ?
I check the input voltage from microcontroller is 3,3V.
I am really confused and frustated.
Could you please give me advice how to solve this problem ?
Any advice is welcome.
Thank you in advance.