Did anyone get the KA08 board working (this board is similar to the KA05 board, but designed for the Arduino Yun: velleman.eu/products/view/?id=420276 )?
The KA05 works great with an Arduino Uno, but I can’t get the KA08 version running with an Arduino Yun. I think the jumper is set correctly (using the middle pin and PWR pin), and 2 power supplies are used (5V for the Yun and 12V for the KA08 board itself).
The output indicator leds blink correctly when testing the example project for the KA08, but the relays are not switching. I can only hear a very silent ‘click’, much more silent compared to switching relays on the KA05 board. It looks like the relays try to switch, but don’t have enough power to do so.
When looking at the schematics provided in the KA08 manual, I don’t see how the relays could get their required 12 volts from the board: they are connected to the voltage regulator, which always outputs 5V to the relays? Or am I misreading the schematics?