Cytron Technical Forum

I went to Nixie yesterday to see the sample of the project and I realize that they are using the PCB of PR27 to run this PR29 project. Will it actually affect???

PR27 and PR29 are using the same PCB.

but it looks a bit different

I've fix everything onto the PCB given by cytron but still black boxes.

Have you programmed the chip? Played with contrast?

tried. i solder one set on the pcb that i made ~ the other one on the pcb given ~ both same result.

this is my pcb. project still not working. presentation is tomorrow. haihz

mark WROTE:this is my pcb. project still not working. presentation is tomorrow. haihz

There is definitely mistakes in your PCB. The capacitor symbol after the rectifier must be a switch. and one of the cap at the 7805 is not grounded. What are the red wires? Are they insulated wires connected underneath the PCB?

Allen

ok, thanks. will edit it. red wires are the jumpers.
but when i fix everything on the pcb given by cytron, still i c black boxes. any idea?

If you dont know how to trouble shoot. The best bet is to send it back to cytron for them to repair 4U.

btw there is one more mistake in your PCB, between RA5 and base of transistor a 1K resistor is missing.

Allen