Mini breadboard PSU

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I bet this was discussed and sampled 1000 times before but here is the mini 5V PSU I use for my microcontroler breadboard projects. Usually you will use a 5 volt DC power supply for your microcontroller projects. Since I got tired of breadboarding the power source part all the time, I built a small PSU to power up my projects. I used a screw-in terminal for power input and I simply soldered pins that stick directly into the bread board for the output part.

5v_mini_psu

I’ll follow up with pictures soon.

C1 should be at least 25V. C3 can be lower (16V, etc.) R1 should be adequate for the LED you choose at 5V – use an online led calculator for that. I sugest 480 – 1K for a red led.

You can power it up using a 9V battery or a small DC adapter depending on your projects need. If the consumption is high you’ll need to use a heatsink  for the LM7805 regulator.

Have fun!