HardLabs

Qt touch1

blackjetrock·experimental-computer-for-schools·pcbs/touch_keyboard/touch_with_qt/qt_touch1/qt_touch1.kicad_pcb

Qt touch1 PCB layout, top view — open source board by blackjetrock

About the Qt touch1 PCB

Qt touch1 is an open source PCB design by blackjetrock, published on GitHub. It is a 2-layer board measuring 229 × 104.5 mm, with 79 components from 44 distinct parts.

Other key parts include the QT1481 and cd40109. By type, the board carries 28 test points, 22 resistors, 21 capacitors, 4 ICs, 2 diodes and 1 crystal.

It belongs with the displays & leds designs in this gallery.

From the project

IBM Experimental computer for schools

The schools computer project ran from 1966 to 1970 and was an experimental machine that was never sold, although several were made and were used in schools in the UK. One machine was used for ten years before it failed. It was designed to be used in schools to teach the basics of computer design and programming. The hardware was based on the same components that the IBM system 360 used. The computer was programmed in machine code, and unlike modern machines the machine code is BCD based, not binary. There are 'extracodes' in the system that are analogous to subroutines, these provided…

Qt touch1, from the project README
From the project README

Main components on the Qt touch1

QT1481cd40109

Qt touch1 bill of materials (BOM)

79 components, 44 distinct parts.

QtyPartRefs
1
QT1481
U1
3
cd40109
U2, U3, U4
1
16MHz
Y1
1
Conn_01x12_Female
J1
1
A
TP1
1
LOAD IAR
TP2
1
DECR ADDR
TP3
1
B
TP4
1
KI RESET
TP5
1
LOAD STORE
TP6
1
NORM RESET
TP7
1
RUN
TP8
1
C
TP9
1
LOAD ADDR
TP10
1
INCR ADDR
TP11
1
STOP
TP12
1
7
TP13
1
1
TP14
1
RELOAD
TP15
1
CLEAR
TP16
Show 24 more
QtyPartRefs
1
DUMP
TP17
1
4
TP18
1
2
TP19
1
CHECK
TP20
1
8
TP21
1
MINUS
TP22
1
5
TP23
1
3
TP24
1
9
TP25
1
DOT
TP26
1
6
TP27
1
0
TP28
1
LED
D1
1
ss36
D2
2
20pF
C1, C2
7
100nF
C3, C4, C5, C12, C13, C14, C15
6
4n7
C6, C7, C8, C9, C10, C11
1
100uF
C16
5
25uF
C17, C18, C19, C20, C21
1
4k7
R1
1
407k
R2
5
470k
R3, R4, R5, R6, R9
14
1k
R7, R8, R10, R11, R12, R13, R14, R15 +6
1
0R
R22

Qt touch1 design files

The KiCad project lives in the blackjetrock/experimental-computer-for-schools repository on GitHub; these links point at the commit this page was built from.

Qt touch1: common questions

How big is the Qt touch1 PCB?

The Qt touch1 measures 229 × 104.5 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Qt touch1?

79 components, from 44 distinct parts. The full bill of materials is listed on this page.

Where can I download the Qt touch1 design files?

From the blackjetrock/experimental-computer-for-schools repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Qt touch1 design in my own project?

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

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