#003 - Dice10: ATtiny10 and only two GPIO!

A project log for Circuit Golf: Electronic Dice Edition

Creating Electronic Dice with the least number of components in the most obscure technologies

Tim • 02/10/2022 at 07:18•5 Comments

Details

Entry by: Tim

Technology: AVR ATtiny10 MCU

Size: 1 ATtiny MCU in SOT23-6, 7 LEDs, (1 Capacitor for decoupling)

Description

#Dice10 is an older project from a few years ago. It uses the smallest possible MCU in a transistor-like package with only 6 pins and no additional parts except the LEDs themselves. It is probably as small as one could make a MCU based die. Using a MCU is cheating somewhat, so we have covered that now.

The secret sauce is in the way the LEDs are controlled: A multiplexing scheme using ternary signalling allows to controll all seven LEDs from only two pins. More details here. The "roll" is initiated by capactive touch sensing that's implemented in software in the MCU, so no additional components are required.

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Light Dice

02/09/2022 at 20:05 • 15 comments

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#004 with old low-voltage Russian relays

02/10/2022 at 18:35 • 7 comments

Discussions

Yann Guidon / YGDES wrote 02/10/2022 at 18:02

"Using a MCU is cheating somewhat, so we have covered that now."

Yeah, yeah, yeah. It's still cheating ;-)

Are you sure? yes | no

Dr. Cockroach wrote 02/10/2022 at 19:18

;-)

Are you sure? yes | no

Tim wrote 02/10/2022 at 20:10

hm.... :) Well, the technology is free choice, so I choose "Discrete MCU" ;)

Are you sure? yes | no

Yann Guidon / YGDES wrote 02/11/2022 at 00:48

It's still a hack, sure

Are you sure? yes | no

Dr. Cockroach wrote 02/11/2022 at 11:03

Yeah, I'll buy that ;-)

Are you sure? yes | no