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Most folk just call me; Orange Joe
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That would be a good excuse to use my microscope
But it turns out I have not worked it out, it's much more complicated than I thought
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But it turns out I have not worked it out, it's much more complicated than I thought
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Aye but you're a smart cookie. If it was easy it wouldn't be as much funThat would be a good excuse to use my microscope
But it turns out I have not worked it out, it's much more complicated than I thought
ajlelectronics
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There is a 40 I/O port SMD device detailed in that link I provided. Simplest way to build it is to connect all the LEDs to an I/O line, then programming should be easy. You might also need a RTC module for the Arduino.
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40 extra pins won't be a huge help. 60 extra pins would have been useful but I've figured it out now.
Can SOT23 be hand soldered?
Going back to the stupid discrete idea, I think I might have worked it out but I'm not sure, is there any (Free) software that can simulate a digital circuit so I can test it?
ajlelectronics
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But it is I2C. That means that you can have many of them connected to the same 2 wire bus, effectively in parallel.
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Most folk just call me; Orange Joe
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Logic gates is cheating, thought it would be much easier than three chains of 30 of these:
I think that will work. If you look closely you might spot transistors arranged as logic gates.
Yes, easily. The main thing you need is decent fine-pointed tweezers, and possibly magnification, depending on your eyesight...
It sounds like your clock project is more about the experiment than the final product, but in a real commercial design, you'd almost certainly find a bunch of shift-register-based open-drain drivers on a whole load of cathodes, with a number of common anodes driven by p-channel mosfets to do the multiplexing. Obviously if you're happy to buy 180-channels of driver then you don't need any multiplexing, but in reality you'd probably not do that...
If you like you can use spare drivers on your shift register to turn on the p-channel anode drivers, so that you're still only using a few pins on the micro.
There are umpteen shift-register LED drivers with all sorts of bells and whistles about fault detection, programmable brightness, special anti-smearing logic, etc.
Here are loads:
http://www.ti.com/lsds/ti/power-management/signage-linear-products.page
Maker
Most folk just call me; Orange Joe
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You're right, got plenty of clocks I just want to make one.
I was really meaning 'make one using some complicated and entertaining circuit' rather than 'make one how someone who bangs stuff like this for a living would do it'.
I'm aware that you're not trying to tell the time. Quite obviously you'd be welding-up a sundial if that was all you needed.
