REVscene Automotive Forum - View Single Post - Need Electrical help (Soldering / Wiring)

PuYang · 09-10-2021, 08:59 AM

Hi, thanks for reading / replying. Apologies, as I sorta resolved the issues.

The diodes for each switch > Row is to guarantee you can press any number of keys and any combination of keys without issue (as you'd want to in a keyboard. I think they call it N-Key Rollover for keyboards). TECHNICALLY, you don't need a diode on EVERY single switch. But then, you'd have to figure out which combination of keys will require it... so it's much easier to just add a diode to each switch to guarantee all combos work. I don't know the details, but something about diodes makes the current flow only in one direction is supposed to resolve that issue?

There are no shorts! I put in a lot of time and effort to ensure all wires are bent and clearing eachother. Probably the most time spent in this entire build is designing and bending rigid the wires xD

I will be soldering the remaining connections tonight or tomorrow. But as of now, I have fixed the issues I was experiencing! I simply reheated the existing solder joints on the switches that weren't working and added a bit more fresh solder to the joints and now the keys all work properly.

My DEL key that I mentioned as somewhat inconsistent did turn out to be a faulty switch, as I soldered / re-soldered its joints a few times and it still acted funny. I then de-soldered it and removed it. Put in a new switch and it now works correctly!

Thanks to everyone who read through my long post. I apologize, as I made it in haste / frustration. Then solved the issues a few hours later. Probably could have saved you guys the trouble of reading it all xD

09-10-2021, 08:59 AM	#3
PuYang I Will not Admit my Addiction to RS Join Date: Oct 2010 Location: Burnaby Posts: 578 Thanked 254 Times in 101 Posts Failed 6 Times in 4 Posts Member's Picture Albums	Hi, thanks for reading / replying. Apologies, as I sorta resolved the issues. The diodes for each switch > Row is to guarantee you can press any number of keys and any combination of keys without issue (as you'd want to in a keyboard. I think they call it N-Key Rollover for keyboards). TECHNICALLY, you don't need a diode on EVERY single switch. But then, you'd have to figure out which combination of keys will require it... so it's much easier to just add a diode to each switch to guarantee all combos work. I don't know the details, but something about diodes makes the current flow only in one direction is supposed to resolve that issue? There are no shorts! I put in a lot of time and effort to ensure all wires are bent and clearing eachother. Probably the most time spent in this entire build is designing and bending rigid the wires xD I will be soldering the remaining connections tonight or tomorrow. But as of now, I have fixed the issues I was experiencing! I simply reheated the existing solder joints on the switches that weren't working and added a bit more fresh solder to the joints and now the keys all work properly. My DEL key that I mentioned as somewhat inconsistent did turn out to be a faulty switch, as I soldered / re-soldered its joints a few times and it still acted funny. I then de-soldered it and removed it. Put in a new switch and it now works correctly! Thanks to everyone who read through my long post. I apologize, as I made it in haste / frustration. Then solved the issues a few hours later. Probably could have saved you guys the trouble of reading it all xD __________________ <:D