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Teletext decoder

avrovulcanxh607·teletext-decoder·PCB Files/Teletext In-Vision Decoder.kicad_pcb

Teletext decoder PCB layout, top view — open source AVR/Arduino board by avrovulcanxh607

About the Teletext decoder PCB

Teletext decoder is an open source AVR/Arduino PCB design by avrovulcanxh607, published on GitHub. It is a 2-layer board measuring 119.4 × 116.8 mm, with 74 components from 42 distinct parts.

Its main chip is the ATmega328-P, from the AVR/Arduino family. Other key parts include the SAA5244A, CXA1645P, LM1881, L7805 and 74HCT04. By type, the board carries 28 capacitors, 18 resistors, 10 connectors, 6 ICs, 4 switches and 3 crystals.

From the project

This repo is an attempt to open-source my teletext decoder.

This repo is an attempt to open-source my teletext decoder.

It was originally designed, tested, and even a few were sold by me in 2019.

You can see the original product page for it on my website.

You are now free to do whatever you like with this design and the firmware for it - except selling it. You are expressly forbidden to use these designs to create a product that you then go on to resell, unless I have given you written permission otherwise.

Main components on the Teletext decoder

SAA5244ACXA1645PLM1881L780574HCT04ATmega328-P

Teletext decoder bill of materials (BOM)

74 components, 42 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
SAA5244A
U1
1
CXA1645P
U2
1
LM1881
U3
1
L7805
U4
1
74HCT04
U5
1
ATmega328-P
U6
1
CXO_DIP14
X1
1
4.43 MHz
Y1
1
Crystal
Y2
1
Video In
J1
1
Video Out
J2
1
VIDEO
J3
1
POWER IN
J5
1
SERIAL
J6
1
MISC
J7
1
I2C
J8
1
ARDUINO
J9
1
Y TRAP
J10
1
PANEL
J11
1
IR Receiver
IR1
Show 22 more
QtyPartRefs
1
10k
RV1
1
PUP
SW1
1
PDWN
SW2
1
ENTER
SW3
1
SW_Push
SW4
1
POWER
D1
1
SYNC
D2
1
TEXT
D3
16
100nF
C1, C2, C3, C4, C5, C6, C14, C16 +8
6
220uF
C7, C8, C9, C10, C11, C12
2
10uF
C13, C15
2
C
C18, C19
2
33pF
C21, C22
1
27k
R1
7
75R
R2, R3, R5, R6, R7, R8, R9
1
680k
R4
1
16k
R10
1
47k
R11
1
4.7M
R12
3
1k
R13, R14, R15
2
10k
R16, R17
1
R
R18

Teletext decoder design files

The KiCad project lives in the avrovulcanxh607/teletext-decoder repository on GitHub; these links point at the commit this page was built from.

Teletext decoder: common questions

What microcontroller does the Teletext decoder use?

The Teletext decoder is built around the ATmega328-P, from the AVR/Arduino family.

How big is the Teletext decoder PCB?

The Teletext decoder measures 119.4 × 116.8 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Teletext decoder?

74 components, from 42 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 Teletext decoder design files?

From the avrovulcanxh607/teletext-decoder 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 Teletext decoder design in my own project?

The repository has no license, so all rights stay with avrovulcanxh607. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Teletext decoder 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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