Bread Board Power Alligator

Story

When I use a bread-board, I need a power supply. I have a generic power supply unit. However, it is not easy to connect the power supply to the bread-board and set the voltage. Therefore, I made a power supply for the bread-board. The power supply is designed to be used with a USB PD power supply. The output voltage is from 3.3V to 20V, and the output current is maximum 1A. The output voltage is fixed each adapter. I made 6 adapters for bread-board power supply. The adapters are 3.3V, 5V, 9V, 12V, 15V, and 20V. The adapters are connected to the bread-board such an alligator clips. It is easy to set up the power supply for the bread-board when you need it. You can use generic USB PD power supply unit.

How to use

Just connect a USB PD power supply to the USB-C connector. Then, connect the adapter to the bread-board. The output voltage is fixed each adapter. If it turns on the power supply, the LED lights up.

Be careful to connect the adapter to the bread-board. The inside of the bread-board power line is +, so connect it so that the top is -. Also, be careful not to connect different adapters to the same bread-board.

Schematic

Each adapter has a different output voltage. The output voltage is determined by any of the following parts.

Schematic PDF File

PCB

*3 In the photo, the PCB is designed to accommodate a Switch, but it was removed from the PCB layout because a compatible Switch could not be found.

PCB Layout

Container

I made 2 types of containers for the bread-board power supply. One is a simple container, and the other is a container with alligator clips. The container is designed to be used with a 3D printer.

There are STL data for 3D printer in the `stl` directory of Github.

bottom.stl is the bottom of the container. upper-al-xx.stl is the upper of the container like alligator clips. upper-simple_xx.stl is the upper of the container like a battery form.

LICENSE

Hardware Schematic Documents are licensed under CC-BY-SA V4.0.