Watch "Always with you". Scheme, description

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ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
Free library / Schemes of radio-electronic and electrical devices

Watch "Always with you". Encyclopedia of radio electronics and electrical engineering

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Encyclopedia of radio electronics and electrical engineering / Clocks, timers, relays, load switches

Comments on the article

I want to present to your court one of my developments.

Watch "Always with you". General view of electronic clock

I must say that I never got around to bringing the watch to mind, but I'm going to do it someday. And then I'll hang this device on the wall :)

Watch "Always with you". LEDs

Why "Always with you"? Yes, because I stole the idea. A very similar clock (by Leitch) is in the air control room of our regional channel 5 (TRC "Petersburg"). And they have such a slogan "Always with you" ...

Who cares: this watch is called UDC-5212, you can download the datasheet on them, leitch.com/productsCatalog/ReferenceProducts/UDC_5212.pdf.

My device is a little simpler and is not an exact copy of Leychev's.

Watch "Always with you". Indicators and buttons

Actually, everything is very clear from the clip. The indicators display the time in numbers, in addition, the time is displayed using LEDs with an accuracy of up to a second. You won’t believe it, but I didn’t develop either a diagram or a printed circuit board drawing in the manufacture of this design. The drawing was made right on the board - at first the drawing was carefully scratched with an awl, and then circled with a marker.

Here are photos (more precisely, scans, because it was scanned) of both sides of the printed circuit board:

Watch "Always with you". Bottom side (bottom) Watch "Always with you". Upper side (top)

And here is the diagram:

(click to enlarge)

Watch "Always with you". Indicators and buttons

In general, the device uses two microcircuits, 73 LEDs, two LED indicators, 14 transistors, 5 buttons, 1 quartz and a few resistors and capacitors.

Microcircuits:
AT90s2313 - microcontroller
K155ID3 - BCD decoder (4-16)

The source code of the controller program is attached: clock.asm. Take it, I'm not greedy. If someone brings this device to mind - also do not be greedy, share.

Publication: radiokot.ru

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