That is why added note about shunt diode in P.S.Sammy hat geschrieben: ↑23.11.2018, 18:49...And if you switch a coil (from a relais) with these outputs without diode in parallel to the coil, the output transistors will be damaged.
.. And if you use a power adaptor, instead of batteries, why the hell are you using battery actuators??? DON'T USE ACTUATORS THAT ARE DESIGNED FOR BATTERY USE FOR THIS!
I just guessed that operating tests at minimal 5V should be OK. But yes, will add it in final assembly, it’s must have!
About “Why PCB type?”, I’m always mentioning it’s a setup for 1.5 month, until I get HmIP-WHS2.. those PCB’s to be utilized then on battery power, as designed.