Power Supply for the Solderless Breadboard
The next step after choosing and buying a Solderless Breadboard is getting a Power Supply for the Breadboard. The electronics projects that I want to do and post on this site need either a 5V or 3.3V supply so I decided to buy one of those off-the-shelf Breadboard power supply.
I got it when I bought the newer/smaller breadboard as a bundle. The power supply fits into the breadboard power rails perfectly. It’s flexible such that I can configure (using the jumpers) the voltage on the breadboard power rails as either 3.3v or 5v. the power module uses two AMS-1117 voltage regulators — a 5v and a 3.3v version. It gets its voltage supply from an external 12v power source via the 5.5mm x 2.1mm DC power socket or the female USB port (which I find odd).
The power supply board have some limitations. For instance, it doesn’t fit the bigger size breadboards that I love to use. To fix the problem, I decided to create an adapter that fits into the larger size breadboards.
The power supply board and the small breadboard bundle is good enough for small low powered projects. I found that the power supply board was having a hard time supplying enough current for some of my projects.
Because of this, I have decided to make my own breadboard power supply that fits into my bigger sized breadboard and also flexible enough the supply either 5 or 3.3 volts. I chose to use the LM317 adjustable voltage regulator chip for my custom breadboard power supply. On my next article I will write about the LM317 chip. Stay tuned…
Gerry Ilagan is into mobile apps and WordPress development at @speeqs. He loves to write about electronics, the Internet of Things, mobile phones, and #crazyideas.