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OpenTendo

circuitly·OpenTendo·Board Files/Motherboard.kicad_pcb

OpenTendo PCB layout, top view — open source board by circuitly
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About the OpenTendo PCB

OpenTendo is an open source PCB design by circuitly, published on GitHub under the TAPR-OHL-1.0 license. It is a 2-layer board measuring 196.3 × 118.7 mm, with 93 components from 51 distinct parts.

Other key parts include the 6116 (WRAM), 74HC373, 74HC139, 6116 (VRAM) and RP2C02 PPU. By type, the board carries 43 capacitors, 16 resistors, 10 ICs, 6 connectors, 3 transistors and 2 crystals.

It belongs with the retro computing designs in this gallery.

From the project

Neither RGB nor HDMI video output were or are a goal of the OpenTendo project, the goal was/is documentation and preservation, and the project was an exercise in reverse engineering. As such "improved" video outputs will not be added to OpenTendo.

Neither RGB nor HDMI video output were or are a goal of the OpenTendo project, the goal was/is documentation and preservation, and the project was an exercise in reverse engineering. As such "improved" video outputs will not be added to OpenTendo.

NESRGB and Hi-Def NES can be installed as normal, but will not be incorporated into the OpenTendo PCB

The gerber files required to order PCBs can be found under releases.

OpenTendo, from the project README
From the project README

Main components on the OpenTendo

6116 (WRAM)74HC37374HC1396116 (VRAM)RP2C02 PPURP2A03 CPU40H368 (CI)40H368 (CII)74LS04CIC

OpenTendo bill of materials (BOM)

93 components, 51 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
6116 (WRAM)
U1
1
74HC373
U2
1
74HC139
U3
1
6116 (VRAM)
U4
1
RP2C02 PPU
U5
1
RP2A03 CPU
U6
1
40H368 (CI)
U7
1
40H368 (CII)
U8
1
74LS04
U9
1
CIC
U10
1
2SA937
Q1
2
2SC2021
Q2, Q3
1
21.477272 MHz
X1
1
4MHz
X2
1
72-Pin Connector
P1
1
EXP-Connector
P2
1
MOD RF
P3
2
Controller Input
P4, P5
1
PWR/RST IN
P6
2
103-25
BC1, BC2
Show 31 more
QtyPartRefs
2
DAN601
DA1, DA3
2
UPA64H
DA2, DA4
1
39uH
FC1
1
Ferrite_Coil
FC2
1
12 x 10K
RA1
1
4 x 6.8K
RA2
1
30pF
TC1
2
?
D1, D2
1
100uF
C1
20
10nF
C2, C3, C4, C10, C11, C12, C13, C14 +12
1
330pF
C5
2
100nF
C8, C46
1
2.2uF
C9
3
220pF
C20, C21, C44
1
1uF
C23
10
330pF
C27, C28, C29, C30, C31, C33, C34, C35 +2
1
18pF
C41
1
15pF
C42
2
51pF
C43, C45
1
1M
R1
2
510
R2, R12
2
100
R3, R4
1
220
R5
1
47K
R6
2
20K
R7, R9
1
12K
R8
1
220K
R10
1
1.2K
R11
1
150K
R13
1
2.2K
R17
2
1K
R18, R19

OpenTendo design files

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

OpenTendo: common questions

How big is the OpenTendo PCB?

The OpenTendo measures 196.3 × 118.7 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the OpenTendo?

93 components, from 51 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 OpenTendo design files?

From the circuitly/OpenTendo 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 OpenTendo design in my own project?

Yes, under the terms of its TAPR-OHL-1.0 license, which circuitly chose for the repository.

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