"Pick up milk." "Feed dog." "Finish homemade nuclear sub." Like many people, I can't function without writing little reminders to myself. But using one paper sticky note after another causes a lot of clutter and can be pretty wasteful. Instead, assemble a bunch of surplus parts into a digital note system for your kitchen or office. Just write out your message with your fingertip on a computer trackpad, and it appears on an LCD screen.
When you're done, press a button and the screen is erased. Add a rechargeable battery and an enclosure, and you have unlimited (and eco-friendly) note-making capability. The project does require some computer code to drive the LCD; you can copy it here. If you can just remember that, you'll be good to go.
TIME: 7 HOURS
- (1) LCD + carrier board (SparkFun Electronics #LCD-00569 + #LCD-00600; $19.95 + $18.95)
- (1) Trackpad (Electronic Goldmine #G1283; $1)
- (1) Microcontroller (Parallax #28803; $99.95)
- (1) PAK-XI Mouse Coprocessor (AWC #PAK11; $23.49)
- (1) 3.3V voltage regulator (SparkFun Electronics #COM-00526; 1.95)
- (1) 10mF electrolytic capacitor (SparkFun Electronics #COM-00523; $0.45)
- (4) 10K resistors (RadioShack #271-1335; $0.99)
- (1) 9V battery $3 (available locally)
- Hookup Wire (RadioShack #278-1224; $5.99)
NOTE: A BASIC Stamp BS2 microcontroller is way too slow for adequately driving this project. The microcontroller used in this project was salvaged from an old Parallax Boe-Bot robot kit. Better performance could be obtained from AVR or PIC microcontrollers. In retrospect, I wouldn't even consider using a BASIC Stamp for this project. If you do, you'll be disappointed. Therefore, please consider this PBASIC code as a "starting point" for building a better digital notepad.
The propeller, also from Parallax, would be a great basic stamp replacement for this project. And at $20 for the proto board, it's a lot cheaper too.
This is the 3rd time I've tried to comment on this -- maybe this time your comment button will work,
Anyway, the tech here is fine. Well... the author admits that the hadware is slow, but the concept apparently works.
In practical terms, it seems to be like a WIndows Vista toaster -- sure, you could make one, but why would you.
Fisher price makes a toy that does this function. It consists of a grid of cells containing metal particles and a thixotropic liquid. (think mayonaisse). You use a magnetic stylus to bring the dark colored surface of the cell -- allowing you to write or draw. The metal is held in place by thixotropicity (all right, I made up that word).
There is also a slider to 'reset' the display.
Works pretty good-- costs 8 bucks or so!
This is a cool project, but very price restrictive. Jhickner makes a fantastic point! The Parallax "Board of Education" is way overkill for this project... the Propeller board looks like a perfect substitute; and from what I understand it already decodes PS/2-- so you can leave out the PS/2 decoder chip as well!
That will cut down the cost of this project to around $75, which is much more feasible than $175...
Another thing you could save $$$ on would be the LCD-- if you're only using the 2 colors there's no need for a full color LCD. Sparkfun sells a B&W 128x64 LCD for only $19.95 with a built-in controller. That would shave another $20 off the price.
Sparkfun B&W LCD:
Even though it would be huge, is there a way to do this with an old laptop? What extras would you need past a laptops screen trackpad motherboard etc...
Where are the instructions to attach the voltage regulator and electrolytic capacitor to the screen??? All the article says is Follow the data sheet instructions on Sparkfun.com to attach...but there is no link or url locations and I cannot find anything about it...does anyone know where I could locate this? Thanks...you can email bweibling at (@ not used for spam purposes...) gmail.com thank you again!
Well i think this is cool but if you r some one like me couldnt you just take a laptop mother board take wht you need off and hook up a smart pad and wht ever you call it
and i would need a huge screen
I'm interested in your product, and I think that some components can be find on www.seekic.com and www.chinaicmart.com
If you work for a company and want to reduce the wastage on post its to one another (because you know people still do that, rather than email!) then could you create this so that you can 'Share' your note with one another? That way it would be multi functional- but would also need a wireless port? I'm not good with the mechanical side, but can see that an office/company/organization structure could use this to save their own post its and then also send ones to their work colleagues- especially those who work in reception.