Raj made a few breadboard modules to speed up prototyping. We think it’s a great idea to have a power supply, few switches, LEDs, etc, broken out into modules. It will save you a ton of time, and space on your breadboard.
Breadboards are a great tool for prototyping and testing electronics circuits. However, if you are tired of building the same basic circuits time and again on the breadboard for testing every new project, here is something that you could try too. I have made some plug-in modules to make my breadboarding life easier. These modules serve very common functions that are required in most microcontroller circuits. Their use not only reduces the number of wire connections on breadboard, but also expedites prototyping and makes debugging of the circuit easier.
Via the forum.