jdduffield
Active member
I have this question about wiring up a breadboard. It was too long to type, so I put it in this YouTube video:
Last edited:
Question about Breadboard Wiring and Grounding
- Thread starter jdduffield
- Start date
Brett
Well-known member
Okay, so coming from your breadboard:
Red wire = +9V
Black = Ground (not -9V)
Yellow = Input
Blue = Output
Green = Circuit Ground
Your switch looks okay to me. You can save a wire by just connecting all grounds together inside your junction box. Tie your DC jack (-) to the middle lug of your 3PDT switch. No need to have a separate circuit ground wire (green), I don't think you're going to notice any difference with noise. You're working on a breadboard, it's for experimenting. The noise reduction efforts are commendable, but I think they're better spent at the time of PCB design rather than with the breadboard.
Have fun breadboarding! In case you haven't seen them, @BuddytheReow has a lot of useful breadboarding tips in the resources section of the site!
Red wire = +9V
Black = Ground (not -9V)
Yellow = Input
Blue = Output
Green = Circuit Ground
Your switch looks okay to me. You can save a wire by just connecting all grounds together inside your junction box. Tie your DC jack (-) to the middle lug of your 3PDT switch. No need to have a separate circuit ground wire (green), I don't think you're going to notice any difference with noise. You're working on a breadboard, it's for experimenting. The noise reduction efforts are commendable, but I think they're better spent at the time of PCB design rather than with the breadboard.
Have fun breadboarding! In case you haven't seen them, @BuddytheReow has a lot of useful breadboarding tips in the resources section of the site!
BuddytheReow
Moderator
Brett’s right. Ground everything to everything else. There’s only 1 power source so there’s no need to separate the grounds. Once you throw charge pumps or voltage regulators into the mix you’ll need to separate the positive or negative voltages. Once you’re up and running on a breadboard it may be worth your while to get a protoboard. It’s a nice tool. The box you’ve made can easily be turned into a test box for future builds. Just my 2 cents.
Oh, and those tutorials will definitely help you get started. Once you get a working circuit going and start modding it, you’ll be hooked.
Oh, and those tutorials will definitely help you get started. Once you get a working circuit going and start modding it, you’ll be hooked.
