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Author Topic: Custom calculator watch (with Brainf*ck interpreter)  (Read 16522 times)

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Offline Keoni29

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Re: Custom calculator watch (with Brainf*ck interpreter)
« Reply #15 on: January 07, 2013, 06:05:36 pm »
There a limit of 60 instructions at the moment since the screen can only hold 72 characters. I will eventually implement a scroll function to be able to expand programs.
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Offline Keoni29

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Re: Custom calculator watch (with Brainf*ck interpreter)
« Reply #16 on: January 08, 2013, 01:01:59 pm »
Sad news: This early prototype is not self-contained. Which means: There is simply not enough space for batteries. The cr2032 cannot supply enough current and they drain rapidly, so this is what I came up with: A small cable to a battery :3

This is obviously a very early prototype. When I want to shrink things down I'm gonna have to etch a printed circuit board and I'll be using SMD components. By shrinking down the components I need less power, so a single 3V cr2032 might do the job. I will also use a smaller LCD probably using only one LED for the backlight.

Oh by the way: a youtube video is coming soon.
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Offline Nick

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Re: Custom calculator watch (with Brainf*ck interpreter)
« Reply #17 on: January 08, 2013, 01:19:16 pm »
Quote from: Keoni29 on January 08, 2013, 01:01:59 pm
Sad news: This early prototype is not self-contained. Which means: There is simply not enough space for batteries. The cr2032 cannot supply enough current and they drain rapidly, so this is what I came up with: A small cable to a battery :3
That's a nice solution, the battery will still be attached to the wathc I guess/hope?

It's kinda inevitable that it consumes a 'lot' of power, but have you thought about some kind of sleep function? As you can see here you can save a lot of working time by simply putting it into sleep, together with dimming the backlight. Or have you already done so?
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Offline Keoni29

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Re: Custom calculator watch (with Brainf*ck interpreter)
« Reply #18 on: January 08, 2013, 01:28:44 pm »
But will it still keep track of time when it's sleeping? I'm not too sure about it.
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Offline Nick

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Re: Custom calculator watch (with Brainf*ck interpreter)
« Reply #19 on: January 08, 2013, 01:29:20 pm »
Don't you use an RTC?
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Offline Keoni29

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Re: Custom calculator watch (with Brainf*ck interpreter)
« Reply #20 on: January 08, 2013, 01:35:36 pm »
Nope. I use software to keep track of time.
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Offline Spyro543

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Re: Custom calculator watch (with Brainf*ck interpreter)
« Reply #21 on: January 08, 2013, 02:07:58 pm »
I've been making  mockups of how my watch-thingy is going to look and behave. I'm thinking it could have a small rechargeable battery in it, and have a dock for it where it could charge. As I think of more ideas and concepts, it's turning into less of a watch, and more of a little handheld thingy. Also, Keoni, mine will have 5 buttons instead of the 3 that you have :P
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Offline Keoni29

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Re: Custom calculator watch (with Brainf*ck interpreter)
« Reply #22 on: January 08, 2013, 03:00:13 pm »
Why do you need so many buttons? My guess: Because it is a friggin pain to enter code with 3 buttons as you can see in.... THIS VIDEO!
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Offline Juju

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Re: Custom calculator watch (with Brainf*ck interpreter)
« Reply #23 on: January 08, 2013, 03:34:03 pm »
That's pretty cool! Will you release the schematics when it's done?
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Offline Keoni29

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Re: Custom calculator watch (with Brainf*ck interpreter)
« Reply #24 on: January 08, 2013, 03:39:20 pm »
Sure
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Offline Nick

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Re: Custom calculator watch (with Brainf*ck interpreter)
« Reply #25 on: January 08, 2013, 03:42:50 pm »
It looks great :) although I would consider an RTC, that might come in handy.. do you use millis() now?
I like the simplicity of it, how you can do anything with only 3 (!) buttons
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Offline Keoni29

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Re: Custom calculator watch (with Brainf*ck interpreter)
« Reply #26 on: January 08, 2013, 03:44:42 pm »
I use a time library which uses the internal timer to keep track of time and date! There are two buttons for increasing and decreasing and one for the mode of those buttons. Sometimes they just act like 3 option buttons.
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Offline Spyro543

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Re: Custom calculator watch (with Brainf*ck interpreter)
« Reply #27 on: January 08, 2013, 05:49:05 pm »
Did you solve your battery problem yet? If not, this may sound really trivial, but do you have a resistor in line with your backlight connected to the battery?
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Offline Sorunome

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Re: Custom calculator watch (with Brainf*ck interpreter)
« Reply #28 on: January 08, 2013, 08:24:50 pm »
Will you make more than one and sell it? lol
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Offline Keoni29

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Re: Custom calculator watch (with Brainf*ck interpreter)
« Reply #29 on: January 09, 2013, 08:30:12 am »
Quote from: Spyro543 on January 08, 2013, 05:49:05 pm
Did you solve your battery problem yet? If not, this may sound really trivial, but do you have a resistor in line with your backlight connected to the battery?
Yes I do have a resistor in line with the backlight. It cannot run off cr2032 batteries because they are just not suited. I prefer a rechargable battery. Not many people have a lithium cell charger (I don't have one either), so when you have to change these cr2032 out all the time it will become quite costly.
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