There are many breadboard adapters readily available with cons and pros. but I decided to add my own flavor to that very simple thing. it has a filtered output and a resettable fuse so the USB port have a chance of staying alive in case of a short-circuit.
PROS:- A ferrite bead to filter out some high frequency noise. it's cheap and tiny. why not? now we may get better ADC results when breadboarding a microcontroller with analog measurements.
- A resettable fuse. add a layer of protection to that precious USB laptop port.
- An on-off switch. better than disconnecting and reconnecting a cable just to reset the circuit.
- LED on the back. you won't get blinded by a shining LED. instead, it illuminates the breadboard with a mild brightness.
- two header rows so it stays robustly connected when shaking that cable.
CONS: (yeah I'm fair)
- It's not placed on the power rails of the breadboard. so you have to wire it yourself. that's because I wanted both 5V and 3.3V with a tiny package.
- It's limited to 0.45A current because of the USB protection.
here's the schematic. its quite simple:
the breadboard power supply schematic
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