risknfun's blog

Physical Computing에 해당하는 글 22건

2007/04/17 [Camera4K] Hacking a Remote Controller (1)
2007/04/15 Leeds Radio
2007/04/15 after the long struggle (2)
2007/01/08 [IPT] Physical Computing part (2)
2006/12/13 [IPT] Puppet Show for Red (8)
2006/12/13 [IPT] Description
2006/12/13 [IPT] MP3 hacking for narration
2006/12/13 [IPT] Making a frame
2006/12/13 [IPT] Sun and Wind controller
2006/12/12 [IPT] Traveler's movement
2006/11/15 [IPT] Interactive Puppet Theater
2006/10/25 innovative process
2006/10/25 Lamp for restaurant - mid term progress
2006/10/15 IR sensor test (1)
2006/10/11 Mouse for Thomas Quasthoff
2006/09/30 Using Servo Motor and Power tools
2006/09/26 Analog input
2006/09/26 Observation Part II
2006/09/22 New Yorkers' digital devices usage
2006/09/19 Hello World!
2006/09/14 Arduino Programming
2006/09/12 Lab - Electronics

[Camera4K] Hacking a Remote Controller

(Click a picture to see bigger one.)

For the Camera For K project, I hacked the Canon WL-DC100 Wireless Controller so that disabilities can operate a camera using their familiar input devices such as a big switch button, a joystick and a touch switch button. Here is the process of it.

1. Preparing Step

* smaller than expected * using 3V CR 2025 battery

* no signal * emitting signal

A remote controller usually uses Infra Red (IR) LED that we can't see with our eyes but can see through a camera. BUT, DO NOT BELIEVE THIS. I saw an IR signal but, the remote controller didn't work at all. It worked after changing a battery.

2. Start Hacking

* Uncover the button surface * Back side of the board

I opened to figure out how I could hack this. The front side was so simple, it seemed just closing the circuit would be work perfect. But, the back side looked I couldn't solder by my hand because every part was too tiny as well as hard to find the connection status.

* schematic of the switch circuit.

I tested the circuit and found that I didn't need 16 wires (8 button x 2 wires/button) but, only 7 wires becuase buttons were sharing the connections.

3. Soldering - totally struggled

* first piece * using guidance of solder

The part using for the original button didn't have good surface for soldering. Therefore I uncovered the coating with fine-metal-wool so that make it better for solder and then covered with hot glue.(left pic) At first time, it seemed fine but turned out very unstable connection.

I've tried several alternative methods such as put guidance of solder. (right pic) It also failed.

* forced the wire (with tape in this picture)

The next thing I tried was physically pressing the wire after soldering to attach firmly with the surface. It worked well so I went further step.

* took IR LED out from the remote controller

I re-wired IR LED by unsoldering and soldering so that I can just attach LED rather than whole remote controller to a camera. BUT, in this step, the remote controller was broken. I think I burned the circuit.

4. Final product and test

* Testing * connect to 1/8" female socket

Finally, I made the same one with a new remote controller and tested successfully. Then, I connected the wires to 1/8" female mono audio socket for making an interface to connect with switches that the kids and the school already had and were familiar with. For examples,