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Bkm-10rlternative

skumlos·bkm-10rlternative

Bkm-10rlternative PCB layout, top view — open source AVR/Arduino board by skumlos

About the Bkm-10rlternative PCB

Bkm-10rlternative is an open source AVR/Arduino PCB design by skumlos, published on GitHub. It is a 4-layer board measuring 210.8 × 74.9 mm, with 244 components from 54 distinct parts.

Its main chip is the ATmega328PB-AU, from the AVR/Arduino family. Other key parts include the 74LVC2G14, 74HC14, TSOP382xx, MAX491E and MCP23S17_SS. By type, the board carries 117 resistors, 55 capacitors, 36 switches, 19 ICs, 14 transistors and 1 crystal.

From the project

Project aiming to replicate the BKM-10R/11R remote for Sony professional CRT monitors.

BKM-10Rlternative, a plug-and-play replacement for the BKM-10R/11R (except for memory card, for now).

Inspired by Aaron Bonhams BKM-10Rduino, which is genious!

Still early, and there's a LOT of components, plus some tweaks might still be needed: Button RC-filters, as I feel that the 10nF should be replaced with 100nF, but needs testing. LED current limiting resistors is of course a preference. I used 470 Ohm in my first prototype. UART CTS/RTS pins are sorta irrelevant, as they're set static anyways. Removing these would also free up pins for porting to regular Atmega328P/Arduino Nano 3.0…

Main components on the Bkm-10rlternative

74LVC2G1474HC14TSOP382xxMAX491EATmega328PB-AUMCP23S17_SS

Bkm-10rlternative bill of materials (BOM)

244 components, 54 distinct parts.

QtyPartRefs
9
74LVC2G14
U1, U13, U14, U15, U16, U17, U18, U19 +1
4
74HC14
U2, U3, U4, U5
1
TSOP382xx
U6
1
MAX491E
U8
1
ATmega328PB-AU
U9
3
MCP23S17_SS
U10, U11, U12
14
MMBT3904
Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8 +6
1
Resonator
Y1
1
ICSP
J2
1
Fuse
F1
1
SHIFT
SW1
1
HORIZ_SYNC
SW2
1
UNDERSCAN_16_9
SW3
1
VERT_BLUE_ONLY
SW4
1
MONO_R
SW5
1
APT_G
SW6
1
COMB_B
SW7
1
F1_F3
SW8
1
F2_F4
SW9
1
ADDR_SAFE_AREA
SW10
Show 34 more
QtyPartRefs
1
UP
SW11
1
MENU
SW12
1
DOWN
SW13
1
ENTER
SW14
1
DEGAUSS
SW15
1
POWER
SW16
1
KEY_1
SW17
1
KEY_2
SW18
1
KEY_3
SW19
1
KEY_4
SW20
1
KEY_5
SW21
1
KEY_6
SW22
1
KEY_7
SW23
1
KEY_8
SW24
1
KEY_9
SW25
1
KEY_DEL
SW26
1
KEY_0
SW27
1
KEY_ENTER
SW28
1
CONTRAST_MANUAL
SW29
1
CONTRAST_KNOB
SW30
1
BRIGHT_MANUAL
SW31
1
BRIGHT_KNOB
SW32
1
CHROMA_MANUAL
SW33
1
CHROMA_KNOB
SW34
1
PHASE_MANUAL
SW35
1
PHASE_KNOB
SW36
40
10nF
C1, C2, C3, C4, C5, C6, C7, C9 +32
2
100uF
C8, C46
11
100nF
C12, C19, C32, C33, C47, C48, C51, C52 +3
2
10uF
C49, C50
53
10K
R1, R2, R3, R4, R5, R6, R7, R8 +45
49
1K
R34, R38, R42, R48, R54, R55, R56, R57 +41
1
NM
R53
14
560R
R101, R102, R103, R104, R105, R106, R107, R108 +6

Bkm-10rlternative design files

The KiCad project lives in the skumlos/bkm-10rlternative repository on GitHub; these links point at the commit this page was built from.

Bkm-10rlternative: common questions

What microcontroller does the Bkm-10rlternative use?

The Bkm-10rlternative is built around the ATmega328PB-AU, from the AVR/Arduino family.

How big is the Bkm-10rlternative PCB?

The Bkm-10rlternative measures 210.8 × 74.9 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Bkm-10rlternative?

244 components, from 54 distinct parts. The full bill of materials is listed on this page.

Where can I download the Bkm-10rlternative design files?

From the skumlos/bkm-10rlternative repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Bkm-10rlternative design in my own project?

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

Can I test firmware for the Bkm-10rlternative 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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