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COVID-19 | SAO Simple Add-on

A simple 555 timer that blinks the test result strip

davedarko

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Description
Details
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Discussion 4

Description

thought of this gimmick to have as a give-away for internet friends at the supercon 2022

Details

BOM

R1, R4 100 Ohm

R3 150 Ohm

R2 390k Ohm

C1 1uF

D1, D2 RED LED

U1 LMC555 timer

Project Logs

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back of latest edition
davedarko • 12/30/2022 at 14:01 • 0 comments

The 555 timer has a chamfer to indicate the side of thr first pin.

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Discussions

Tom Nardi wrote 01/12/2023 at 22:39

Are you planning on releasing the board files for this?

Are you sure? yes | no

davedarko wrote 01/12/2023 at 22:59

woops, thought I had posted the github link here, it's in this repo https://github.com/davedarko/Simple-Add-ons-SAO

Are you sure? yes | no

sunny wrote 12/31/2022 at 05:13

Do you consider replacing the plug on the back with typec?

Are you sure? yes | no

davedarko wrote 01/01/2023 at 09:53

hey sunny, I haven't seen any simple add-ons for badges that use USB-C yet. If I'd make this portable, I would probably just use a coin cell instead.

Are you sure? yes | no

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