ATmega328P Corgi Arduino

The Corgi Arduino with the 328P, also known as the Corginator 9000, is a low cost design with a classic and easy-to-use chipset.

It has easy-solder components such as TQFP32, SOIC16, and 0603 components.

It features an onboard USB-serial converter, Nano Pinout(with VIN support), ICSP header, and a 16MHz clock.

Designed by myself and CrazyBlackStone.

Corginator PCB

0603 LEDs- 4

10K resistors 0603- 1

1K resistors 0603 - 6

100nF 0603 - 4

4.7uF 0603- 1

22pF 0603- 2

16MHz crystal- 1

ATMega328P TQFP-1

CH340C-1

Button(Tactile)- 1

AMS1117- 1

SS12F- 1

USB-B Socket-1

1x15 headers 2.54mm- 2

2x3 Headers 2.54mm- 1

This section of the schematic is simple: USB, diodes, and mappings.

This is the USB-B socket, 5V power(with diode prot), and the data connections to the conversion chip.

The corginator is meant as an entry development board, which makes a lack of onboard USB a poor choice for the board.

Thus, a low-cost CH340 is used.

The CH340C is extremely simplistic to use. It requires only two 1K resistors on RX and TX, and 2 100nF decoupling capacitors on 3.3V and DTR.

There are also RX + TX LEDs attached.

In addition the CH340C itself provides 3.3v output.

An AMS1117 is used for 7-12V input down to 5V. It's quite low cost.

The circuit is rather simple. Input power and output decoupling.

This is just assigning pins to all the pins on the chipset.

Lastly, this is assigning the Nano Pinout and ICSP header.

Now the schematic is done, we shall make the PCB!

This is how it was routed.

I had the PCBs made with a white soldermask and black silkscreen. HASL finish.

I sourced the components(listed earlier), and soldered the components on. My iron isn't particularly good and I managed to solder most on without difficulty. However, some parts were harder and lead to faulty connections.

In addition, the first variant lacked the 100nF capacitor and I was forced to "boodge-wire" the capacitor.