February 16, 2015

YwRobot Breadboard Power Supply

Found a great write up on these 5v-3.3v breadboard power supplies. Very little documentation is available online. It is one of those figure it out yourself add-ons. You get dual output that is selected via the jumpers. Either 5v-5v or 3.3-3.3 or any combination of the two.

One bit of caution is that if you reverse it on the breadboard your + & - rails will also be reversed. Pictures are below.

You can feed this 5v dc via USB or do what did and feed it 9v dc @ 750mah via the barrel connection. (tip positive sleeve negative)

Notice the polarity of the rails are wrong. It is very easy to overlook this.

This is the correct way

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