I am converting an almost 100 year old typewriter into a printer that will print your tweets to it on paper while you can watch it on a webcam.
It has been a good week for the typewriter to printer conversion project.
- Andrew helped me put together a table I designed for the typewriter. Basically I just went to Home Depot and bought 3 pieces of lumber ($15) and figured out how to cut them to get what I need out of them. Turned out pretty stable. Maybe I should build more of them anyway, quite good size for a standing-work desk and dead cheap.
- SolenoidsI bought turned out to have enough power to pull the key down enough to strike. This showed though, that they will all need to be individually adjustable, since each key has a little different resistance.
- I finally got almost all the electronics I need (another motor probably for better cartridge return), so I started soldering the control board and it works very well with the arduino. (right now still connected to a computer to read from keyboard and send pull to according solenoid. At some point I will use a WIFI arduino to make have the least cables possible go into the table to make it moveable)
- Configured an old network camera to show what the typewriter is doing on the web. Important to show people what is printed after they send their tweet to the typewriter
- Jane helped me figuring out how the online representation should be. We will open a site called something similar to “le petite print shop” and give the typewriter its own “business” where you can get your tweets printed.
- check the shift registers (74HC595), in a daisy chain for 32 different outputs. I found a source for them at Creatron here in Toronto because of Jon who is working on a very cool flipper project.
- Finish soldering the control boards (2 boards with each 16 transistors and 2 shift registers to control 32 “actions” all together.
After above two steps are done, the electronics soldering part should be done, just a few pins from an arduino will go into the shift registers and control all keys. Not sure yet if also the cartridge return and new line motors will / can go through that or if they will be connected directly to the arduino. However – should not be an issue.
- Laser cut 3 pieces that will let me move the solenoids up and down and fix them in position with a screw. Will do this at site3 here in Toronto, a really cool spot to build hardware.
- Fix motor with gears on new line gear (this is all moving with the cartridge return, therefore not that easy)
- Find new motor for cartridge return, maybe same one as new line anyway?
- Make sure it is easy to move and setup (just one cable to plug in and WIFI setup on arduino / also setting twitter hashtag or account on the web server to line up tweets) so we can actually take it somewhere to show people during events or at places.
Feedback / Ideas – let me know!