Testing the ATMEGA328-MCU (preparing the power supply)
In order to test the MCU we first need power. We have two options: the FTDI connector or an external power supply. Let’s first try the FTDI option
since we’ll need some of the same parts for the external power supply.
First, we’ll solder on a jumper that we can use to choose between USB and external power.
Required parts:
Placing the parts:
1*Pinheader
(3 Pins)
1*Jumper
We use this jumper to choose the power
source: either the FTDI connector (Position:
USB) or an external supply (Position: WALL).
Then we‘ll attach the power LED so we can
tell when the power is on.
1*red LED
1*1 kOhm
Attention! The LED has a long
and a short leg. The long leg
should go through the red
hole in the diagram and the
short one through the blue hole.