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Ttyloopdriver

John-Nagle·ttyloopdriver·board/ttydriver01.kicad_pcb

Ttyloopdriver PCB layout, top view — open source board by John-Nagle
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About the Ttyloopdriver PCB

Ttyloopdriver is an open source PCB design by John-Nagle, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 119.4 × 74.9 mm, with 66 components from 45 distinct parts.

Other key parts include the LT3750, AP2553W6, CP2102-breakout, CPC1510G and IE0524S. By type, the board carries 17 resistors, 10 capacitors, 9 ICs, 7 modules, 6 diodes and 4 connectors.

It belongs with the power & battery designs in this gallery.

From the project

Hardware device for driving antique Teletype machines

For use with 60mA current loop Teletypes at 45 baud.

Version 3.3 works, successfully driving a Model 15 Teletype. It's also been built by Steve Garrison and used to drive a Model 28 Teletype.

This is a board to allow connecting antique Teletype machines to a computer through a USB port. It's for Teletype Model 14 and 15 machines, which use 60mA current loops. This board needs no external power supply other than the USB port. This approach uses only about 1 watt of power, drawing 200mA from the USB port.

Ttyloopdriver, from the project README
From the project README

Main components on the Ttyloopdriver

LT3750AP2553W6CP2102-breakoutCPC1510GIE0524SIE0515S74HC1GU04

Ttyloopdriver bill of materials (BOM)

66 components, 45 distinct parts.

QtyPartRefs
1
LT3750
U1
1
AP2553W6
U2
1
CP2102-breakout
U3
3
CPC1510G
U4, U6, U7
1
IE0524S
U5
1
IE0515S
U8
1
74HC1GU04
U9
7
narrower_0.3mm
M1, M2, M3, M4, M5, M6, M7
1
IRL530NS
Q1
1
DN2625
Q2
2
1/4 in phone jack
J1, J2
1
MOTOR CTL RELAY JACK
J3
1
CONN_01X02
P1
1
Switch_SPDT
SW1
1
Button_SPDT
SW2
1
Coilcraft-DA2032
T1
6
TEST_1P
W1, W2, W3, W4, W5, W6
1
D
D1
1
1.8V
D2
1
D
D6
Show 25 more
QtyPartRefs
2
120V
D10, D11
1
LED_3
D13
1
6.8uH
L1
1
1uH
L2
2
1uf
C1, C2
1
220uf
C4
1
100pf
C5
1
1000pf
C7
1
33uf
C8
2
10uf
C9, C11
2
0.1uF
C10, C12
1
10
R1
1
100K
R2
1
91m
R3
1
23K
R4
1
22
R5
1
43K
R6
1
2.49K
R7
1
1K
R9
3
390
R10, R11, R12
1
3.3K
R13
1
1M
R14
2
560
R15, R17
1
53.6K
R16
1
2.2K
R18

Ttyloopdriver design files

The KiCad project lives in the John-Nagle/ttyloopdriver repository on GitHub; these links point at the commit this page was built from.

Ttyloopdriver: common questions

How big is the Ttyloopdriver PCB?

The Ttyloopdriver measures 119.4 × 74.9 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Ttyloopdriver?

66 components, from 45 distinct parts. The full bill of materials is listed on this page.

Where can I download the Ttyloopdriver design files?

From the John-Nagle/ttyloopdriver repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Ttyloopdriver design in my own project?

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

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