Hi
After testing the setup on a breadboard, i'm trying to solder some components on a pcb.
But when testing the resulting pcb, i get false readings. After soldering the components on another location on the pcb i still had similar issues.
I was really wondering what i'm doing wrong.
I found that when reading the resistance of the Resistors while on the PCB they read very different from when taken off from the PCB (e.g. on pcb it reads 20K and when desoldered/removed it reads 47K)
i've soldered using s39, and us a small tip which doesn't look like it's burning everything.
I attached my PCB and shown in red some islands which are interconnected.
(i haven't drawn all. but at least directly around the red marks, those islands aren't connected.)
The resitance between the islands range from 0.5M
up to 10M
. In very worst scenario, the resistance was as low as 200K
?!
Am i doing something wrong?