I purchased the modular nixie clock with WIFI. I have begun to assemble it and am having the following problem:
I completed the low voltage section with following result:
When applying the power source (9 v, 0.5A), the led will not light and I do not show any voltage between any GND test point and VCC test point.
I have 9v between the GND test point and rear pin of the power jack
I have 9v between VCC and rear pin of power jack.
No voltage between GND and VCC at 4 pin connector.
If I touch probe to both VCC and VIN on 4 pin connector with power supply hooked up, the LED lights up.
Both 220uf caps have correct polarity
The little 100nf cap (pancake cap marked 104) had no polarity markings and I don’t believe it makes a difference with those little caps, at least it didn’t on the last clock I built.
The inductor was not as pictured, it was a dumbbell shaped cylindrical inductor not the 330 marked inductor. There were inductors of that type and I used the smaller one here after researching what I had. Polarity should not be an issue with the inductor.
Can you provide some guidance or point to potential problems or whether or not I have a bad component. All components are hooked up correctly as far as I can tell. D1 and D3 are installed at the correct points and polarity. I am just getting in to electronics and do not have a lot of experience with circuits and components, but I did successfully complete a working nixie clock using IV-11 tubes. That one had horrible instructions, basically just some bad pictures. Your instructions are much better.
Do I need a bigger power supply (> 1.0 amp)?
My kit shows version 46 but I am using the version 45 manual.