Hi all! As an exercise to learn KiCad, I copied the Adafruit Boardunio design. It's a bare bones UNO, just the ATMEGA328P-PU and support components for it to function. My post on the KiCad forum detailing what I did can be found here Ordered PCB boards and parts and built one, and it works. I was …

Good news, I got it working! There were 2 problems with this. First, I didn't understand the datasheet for the CP2103 corectly. Thanks to @Grumpy_Mike I corrected that problem. I thought I could use the CP2103 with a 5v system. Once I added in a level shifter between the CP2103 and my clone UNO, I…

Using a CP2103 to program an ATMEGA328-PU

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Grumpy_Mike September 30, 2021, 4:15pm 4

Can you post the bit of the circuit that shows the CP2103 with its connections to the USB as well as to the Arduino and reset circuit.

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Using a CP2103 to program an ATMEGA328-PU

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