HardLabs

Debugging Front Panel

alexiosc·cft·kicad/cft/cft-dfp/cft-dfp-20191126-r1945.kicad_pcb

Debugging Front Panel PCB layout, top view — open source AVR/Arduino board by alexiosc

About the Debugging Front Panel PCB

Debugging Front Panel is an open source AVR/Arduino PCB design by alexiosc, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 280 × 164.6 mm, with 165 components from 34 distinct parts.

Its main chip is the ATmega64-16AU, from the AVR/Arduino family. Other key parts include the 74LVC1G04, 74HC139, 74LVC1G07, 74AC573 and 74HC590. By type, the board carries 80 capacitors, 59 ICs, 16 resistors, 4 diodes, 2 crystals and 2 connectors.

It belongs with the usb & debug tools designs in this gallery.

From the project

The CFT homebrew minicomputer

The CFT is a home-designed, home-built mini-computer made from scratch.

I've designed and built the instruction set, data path, processor, computer, software stack, cross-assembler, emulator, software toolchain and even some of the tools needed to do all this. You can call this a ‘fantasy mini’.

This project has been going since approximately 2001, in my Copious Free Time.

Debugging Front Panel, from the project README
From the project README

Main components on the Debugging Front Panel

ATmega64-16AU74LVC1G0474HC13974LVC1G0774AC57374HC59074HC54074HC13874HC7474LVC1G1174HC25374HC11274HC25174HC57474HC541SN74ACT1073SN74ACT107174LVC1G17

Debugging Front Panel bill of materials (BOM)

165 components, 34 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
ATmega64-16AU
U101
2
74LVC1G04
U102, U109
1
74HC139
U103
5
74LVC1G07
U104, U105, U106, U115, U504
1
74AC573
U107
1
74HC590
U108
1
74HC540
U110
10
74HC138
U111, U112, U113, U501, U1201, U1202, U1203, U1204 +2
2
74HC74
U401, U402
1
74LVC1G11
U403
1
74HC253
U404
1
74HC112
U502
1
74HC251
U503
19
74HC574
U601, U602, U603, U604, U605, U606, U701, U702 +11
1
74HC541
U903
2
SN74ACT1073
U1101, U1108
7
SN74ACT1071
U1102, U1103, U1104, U1105, U1106, U1107, U1109
2
74LVC1G17
U1301, U1302
1
CXO
X101
1
33 MHz?
X102
Show 14 more
QtyPartRefs
1
AVR-ISP-6
J101
1
Conn_01x06
J102
1
Conn_02x03_Odd_Even
JP101
1
SW_DIP_x08
SW1
2
D_ALT
D1301, D1302
2
LED_ALT
D1303, D1304
5
1µF
C101, C102, C103, C106, C117
65
100nF
C104, C105, C107, C108, C109, C110, C111, C112 +57
10
47µF
C124, C125, C126, C127, C128, C129, C201, C202 +2
3
4.7kΩ
R101, R102, R103
8
30Ω
R104, R105, R106, R107, R108, R401, R402, R501
2
220kΩ
R1301, R1302
2
1.2kΩ
R1303, R1304
1
4.7kΩ
RN901

Debugging Front Panel design files

The KiCad project lives in the alexiosc/cft repository on GitHub; these links point at the commit this page was built from.

Debugging Front Panel: common questions

What microcontroller does the Debugging Front Panel use?

The Debugging Front Panel is built around the ATmega64-16AU, from the AVR/Arduino family.

How big is the Debugging Front Panel PCB?

The Debugging Front Panel measures 280 × 164.6 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Debugging Front Panel?

165 components, from 34 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the Debugging Front Panel design files?

From the alexiosc/cft repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.

Can I use the Debugging Front Panel design in my own project?

Yes, under the terms of its GPL-3.0 license, which alexiosc chose for the repository.

Can I test firmware for the Debugging Front Panel without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug AVR/Arduino firmware against it before you order a PCB.

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