r/breadboard

Why does my LED work in reverse?

Hey,
First of all, im an absolut beginner with this stuff, so sorry for being stupid in advance!
Every RGB LED I see online uses 3 resistors and 3 connectors to the Powersource, with one pin being for ground.
But in my setup this doesn’t work, instead I use one pin for power and the other 3 for ground, depending on which ground is connected, the color changes.

Am I doing something wrong?

u/Immediate-Soil-7820 — 22 hours ago

Series and parallel circuit in a breadboard

In the left theres a series circuit containing 2 220 ohms resistors and also a 100 ohm resistor totaling about 540 ohms with a 9 volts battery which has a safe current for a red light emitting diode. On right, theres a parallel circuit that has both 1k ohms, totalling the resistance to 500 ohms using also a 9 volts battery which has a safe current for the red light emitting diode.

That's all I'm going to tell, thank you for reading. Edit: the 2 jumper wires connecting to the right are now placed on the left power bus

u/Impossible-Paper9217 — 4 days ago
▲ 2 r/breadboard+1 crossposts

Designing a USB-C breadboard power supply. What features do you wish to add?

I am developing a custom power supply for breadboard. I would love to know what everyone would like to have in it. I have started a list below from my needs please add your wishes / dreams and ambitions for a USB-C power supply for breadboards.

I will be making this board available once it's ready for distribution.

Way to organise

  1. Mention your country (where you from)
  2. List all your requirements / wishes / dreams / ambitions from a USB-C Breadboard power supply

My List so far

  1. Use USB-C type connector
    1. Should be able to work with smart and dumb chargers and PC ports
  2. Fit right on top of the power rails
  3. Supply 3.3v or 5v (user selectable)
  4. Handle max 1 to 1.5A of current
  5. Breakout the D+ and D- pins
  6. LED indicators for power good (3v3 and 5v)

I kept it simple since this is just the start and would love to increase this feature list with your help.

reddit.com
u/Eagnir — 6 days ago

Vape breadboard

I was pissed off that the juice in the vont is not used to a 100 procent so I coupled it and now I can vape it from the breadboard. Soo... is it a W or a L

u/Affectionate-Gas2081 — 11 days ago
▲ 16 r/breadboard+2 crossposts

Charging & Discharging Circuit of the Capacitor (Time Constant = 1 second)

If Resistor = 100 kilo ohm & Capacitor = 10 micro farad

Then,

Time Constant = RC = 1 s

And,

Full charge/discharge time ≈ 5(Time Constant) ≈ 5 s

u/SpecialistRare832 — 14 days ago