Mistake: Digital tachometer K2625
Electric scheme - Baseprint: pins 3,5,11,13 of IC3 socket connected together to the ground!
Printed circuit board - Baseprint: pins 3,5,11,13 of IC3 socket connected to +V! In my opinion
it is a mistake, isn’t it? Please your answer. Best Regards from Zagreb - Petar
You are correct, they are connected to the ‘+’.
Thanks for reporting this.