Difference between revisions of "Treadle computer"
From Makers Local 256
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==Needed== | ==Needed== | ||
| − | * treadle | + | * treadle ✓ |
| − | * low power computer | + | * low power computer ✓ |
| − | * low power display | + | * low power display ✓ |
* small battery or capacitor bank | * small battery or capacitor bank | ||
* circuit to detect the absence of voltage in and send a signal to the computer to hibernate to disk. | * circuit to detect the absence of voltage in and send a signal to the computer to hibernate to disk. | ||
* serial connection to computer | * serial connection to computer | ||
| − | == | + | ==Attempt #1== |
| − | + | ||
| − | + | ||
| − | + | ||
===Belt driven=== | ===Belt driven=== | ||
| − | * | + | * Flywheel turns a belt that then turns and alternator. |
| + | * Alternator is a good choice as it's already setup with a voltage regulator, etc for charging a 12V lead acid/AGM battery. | ||
| + | |||
| + | ===Power regulation=== | ||
| + | * [http://www.amazon.com/gp/product/B00FL1TTXC/ Wagan (EL2892) TravelCharge 9.6 Amp Quad Power Hub] | ||
| + | ** 12V in and 5V 9.6A out | ||
| + | ** may get a second one just for the extra ports | ||
| + | |||
| + | ===Power monitoring=== | ||
| + | |||
| + | ===Display=== | ||
| + | * [http://www.amazon.com/gp/product/B005SEZR0G/ AOC E1649FWU 16" USB-Powered Portable LED Monitor] | ||
| + | ** 5V 2A, which may sound high but the screen should be really nice | ||
| + | ** USB mini to USB A y-connector | ||
| + | *** presumably because of the limited amp output of USB ports on computers | ||
| + | |||
| + | ===Computer=== | ||
| + | * [http://www.amazon.com/Raspberry-Pi-Model-Project-Board/dp/B00T2U7R7I/ Raspberry Pi 2 model B] | ||
| + | ** 5V 350mA | ||
| + | ** there are faster boards out there but this one was easily obtained and can be replaced if necessary | ||
==Notes== | ==Notes== | ||
| Line 28: | Line 44: | ||
* [http://askubuntu.com/questions/321532/how-to-make-ubuntu-13-04-work-with-displaylink-monitor latest-ish Ubuntus are fully displaylink compatible] | * [http://askubuntu.com/questions/321532/how-to-make-ubuntu-13-04-work-with-displaylink-monitor latest-ish Ubuntus are fully displaylink compatible] | ||
* [http://pi.gate.ac.uk/pages/hardware.html 5V computer hardware comparison] | * [http://pi.gate.ac.uk/pages/hardware.html 5V computer hardware comparison] | ||
| + | * [https://www.olimex.com/Products/OLinuXino/A10/A10-OLinuXino-LIME/open-source-hardware another low power ARM computer] | ||
| + | * '84 Ford Ranger alternator is the cheapest alternator to be had. | ||
| + | * [http://www.linux.com/learn/tutorials/769947-the-mars-diy-platform-for-around-100-without-screen MarS board] | ||
==Final design== | ==Final design== | ||
Latest revision as of 19:51, 9 April 2015
|
Creator: |
Contents
[hide]Overview
A treadle (foot pedal from an old sewing machine) powered computer. Got the idea from The Windup Girl by Paolo Bacigalupi. The idea of a user powered computer seems like a great way to stay on task when one sits down to use it. You'll sit down and type up that e-mail instead of watching youtube videos for a half hour.
Needed
- treadle ✓
- low power computer ✓
- low power display ✓
- small battery or capacitor bank
- circuit to detect the absence of voltage in and send a signal to the computer to hibernate to disk.
- serial connection to computer
Attempt #1
Belt driven
- Flywheel turns a belt that then turns and alternator.
- Alternator is a good choice as it's already setup with a voltage regulator, etc for charging a 12V lead acid/AGM battery.
Power regulation
- Wagan (EL2892) TravelCharge 9.6 Amp Quad Power Hub
- 12V in and 5V 9.6A out
- may get a second one just for the extra ports
Power monitoring
Display
- AOC E1649FWU 16" USB-Powered Portable LED Monitor
- 5V 2A, which may sound high but the screen should be really nice
- USB mini to USB A y-connector
- presumably because of the limited amp output of USB ports on computers
Computer
- Raspberry Pi 2 model B
- 5V 350mA
- there are faster boards out there but this one was easily obtained and can be replaced if necessary
Notes
- I'll be obtaining a donated Singer treadle powered sewing machine on 08/16/2013. Researched low power displays and came up with three possible solutions: pixel qi 10" ($299), mimo 710s 7" displaylink display ($140), or pico projector (~$200 and would require shading on the desk) --strages (talk) 10:17, 13 August 2013 (CDT)
- AOC E2251FWU 22 - Inch Widescreen USB LED Monitor
- latest-ish Ubuntus are fully displaylink compatible
- 5V computer hardware comparison
- another low power ARM computer
- '84 Ford Ranger alternator is the cheapest alternator to be had.
- MarS board
Final design
References
- Jean-Paul Tarit's treadle computer
- direct drive?
- Muckle LLP's treadle computer
- belt driven
