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TTY

KALTCHUK·Z80_Modular_Computer·KiCAD files/Proton cards/TTY/TTY.kicad_pcb

TTY PCB layout, top view — open source AVR/Arduino board by KALTCHUK
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About the TTY PCB

TTY is an open source AVR/Arduino PCB design by KALTCHUK, published on GitHub. It is a 2-layer board measuring 99.7 × 69.9 mm, with 43 components from 22 distinct parts.

Its main chip is the ATmega328P-PU, from the AVR/Arduino family. Other key parts include the 74LS07, 74LS74, 74LS08, 74LS85 and 74LS00. By type, the board carries 18 capacitors, 9 ICs, 7 connectors, 4 diodes, 3 resistors and 2 crystals.

It belongs with the retro computing designs in this gallery.

From the project

"Anyone who has brought up CP/M on a homebuilt computer has felt this moment of elation. A myriad of connections are properly closed; bits are flying at lightning speeds over busses and through circuits and program logic, to produce a single prompt". Gary Kildall

Main components on the TTY

74LS0774LS74ATmega328P-PU74LS0874LS8574LS0074LS245MAX232

TTY bill of materials (BOM)

43 components, 22 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
74LS07
U1
1
74LS74
U2
2
ATmega328P-PU
U3, U4
1
74LS08
U5
1
74LS85
U6
1
74LS00
U7
1
74LS245
U8
1
MAX232
U9
2
20MHz
Y1, Y2
1
Power Bus
J1
1
Signal Buss
J2
2
TTL/RS232
J3, J5
1
Card addr
J4
1
TTY1
J6
1
TTY0
J7
4
LED
D1, D2, D3, D4
4
22pF
C1, C2, C7, C8
1
10uF
C3
8
10nF
C4, C5, C6, C9, C10, C11, C12, C13
5
1uF
C14, C15, C16, C17, C18
Show 2 more
QtyPartRefs
2
4x10k
RN1, RN2
1
4x220
RN3

TTY design files

The KiCad project lives in the KALTCHUK/Z80_Modular_Computer repository on GitHub; these links point at the commit this page was built from.

TTY: common questions

What microcontroller does the TTY use?

The TTY is built around the ATmega328P-PU, from the AVR/Arduino family.

How big is the TTY PCB?

The TTY measures 99.7 × 69.9 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the TTY?

43 components, from 22 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 TTY design files?

From the KALTCHUK/Z80_Modular_Computer repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the TTY design in my own project?

The repository has no license, so all rights stay with KALTCHUK. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the TTY 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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