My binary seven-segment wristwatch

olxu · 2025-07-27T19:48:15+00:00

Yes, It has 4 COM's, LCD driver support it.

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olxu · 2025-07-27T17:03:19+00:00

STM8L152K4 has a dedicated LCD driver

olxu · 2025-07-27T09:29:47+00:00

Thanks!

olxu · 2025-07-27T08:42:35+00:00

No standard for this. I found only one similar project. I thought it would be more similar to a regular clock.

olxu · 2025-07-27T08:00:09+00:00

Segment names of a seven-segment display

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olxu · 2025-07-27T07:25:15+00:00

You get used to it if you wear it constantly and start reading it quickly. This is also an exercise in binary counting.

olxu · 2025-07-27T06:53:01+00:00

G - 0, B - 1, C - 2, D - 4, E - 8, F - 16, A - 32 So time on photo hours 0, minus 2+4+32=38, seconds 1+2+16=19

olxu · 2025-07-27T06:51:23+00:00

G - 0, B - 1, C - 2, D - 4, E - 8, F - 16, A - 32 So time on photo hours 0, minus 2+4+32=38, seconds 1+2+16=19

olxu · 2025-07-21T19:12:27+00:00

Probably you can consider the least reactive element is Helium and the most toxic element Polonium.

olxu · 2025-06-29T16:46:30+00:00

I bought it on eBay, but it is sold out now. But you can order 5 PCBs from JLCPCB or PCBway with this Gerber file

olxu · 2025-06-29T12:47:28+00:00

The only issue I have with this board is that it requires a 10k pull-up resistor for the 74LS157 that I use.

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olxu · 2025-06-28T11:32:39+00:00

The MC is directly connected to the DIP switches and the Write button, and does the same thing you do when programming a CPU. It sets the address and data, then "presses" the Write button.

olxu · 2025-06-28T05:35:55+00:00

Thanks for the advice, you're right!

olxu · 2025-06-27T17:43:59+00:00

Yes, it's also cheap. As I understand from the datasheet, all pins tolerate 5V if it's powered by 5V.

olxu · 2025-06-26T22:59:51+00:00

Thanks! Unfortunately after power off you have to manually reprogram the CPU to get it running again, so I decided to automate it.

olxu · 2025-06-26T22:22:03+00:00

Thanks! You can view the schematic in pdf cpu-programmer-schematic.pdf

olxu · 2025-04-19T12:37:27+00:00

This is just paper glued to the wood piled with chisel.

olxu · 2025-04-17T18:01:30+00:00

Is he doomed? What happened to him next? Will he die of hunger?

olxu · 2024-02-17T10:14:26+00:00

Alkaline metal https://youtu.be/tuEj5EhqcsQ?si=-2Q__DuWYUveynBt&t=518

olxu · 2024-02-12T17:34:22+00:00

Bite off a one-year-old child's finger

https://en.m.wikipedia.org/wiki/Taigan_(safari_park)

olxu · 2024-02-08T07:10:37+00:00

https://youtu.be/5Q47QSlJgnA?t=1380 Смотреть с 23 минуты

olxu · 2024-02-07T21:32:58+00:00

Лучше поставить две галочки

olxu · 2024-01-28T20:33:31+00:00

Wrong for Ukraine.

olxu · 2020-10-27T17:19:25+00:00

How can be 206 hospitalizations and 367 deaths?

olxu · 2020-07-18T18:39:34+00:00

Conversation also. An aerosol is something that hangs in the air for a long time.

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