- Joined
- May 27, 2012
- Messages
- 759
- Motherboard
- DQ77KB
- CPU
- i7-3770S
- Graphics
- HD4000
- Mac
- Mobile Phone
Been a while so time for an update
CUBE SWITCH
After getting my main components installed in my cube, I quickly found (as others have) mounting the original cube switch is hard as the MB is too close.
So thought about options.
Moving the switch to a different location (involve cutting the case) was more than I wanted to take on. The Edison solution seemed obvious but you lost the visual led indicators. I wanted to try something different
Infrared
Then i thought about infrared detection through the top vent of the case. The goal is to be able to turn the cube on by waving to it, i.e. passing your hand over the top vent.
The sensor works with two elements. An IR LED that generates an infrared signal out of the top of the vent. Second is an IR Detector, which detects reflected light from an object (hand) passing above the vent.
I found the following little board on ebay that does just this.
http://www.ebay.com.au/itm/350789239727
You can see the LED mounted on the left end of the board, and the detector just above it pointing to the side. Here is how I believe the basic circuit is structured.
Most of the circuit is constructed around an NE555 timer that flashes the IR LED at 38KHz. The board has an adjustment for the IR LED brightness, this affects the sensitivity (range) that the sensor works.
An IR Detector TSOP "chip" itself has all the necessary optics and internal circuitry to discriminate the 38khz signal, thus preventing detection from other background infrared light.
The TSOP takes 5V power, GND, and has a single output which goes low when the signal is detected. This can be wired to the power switch on the MB. It is a drop in replacement for Edison sensor.
The main issue with the board is how to mount it. I choose to mount it horizontally on top of the HDD, so that the LED and detector shine up through the vent. I had to replace the LED and detector, so they could be pointed up. I ordered a replacement for the IR LED and Detector off eBay
Detector - TSOP4838 - 38Khz
http://www.ebay.com.au/itm/260837712263
940nm 5mm Infrared LED
http://www.ebay.com.au/itm/290562020389
Replacing the components wasn't too hard, but you need a fine soldering iron, and I used a "solder sucker", to clear the holes on the PCB. Here is the result after modification
The LED is on the left, and the detector in the middle.
CUBE SWITCH
After getting my main components installed in my cube, I quickly found (as others have) mounting the original cube switch is hard as the MB is too close.
So thought about options.
Moving the switch to a different location (involve cutting the case) was more than I wanted to take on. The Edison solution seemed obvious but you lost the visual led indicators. I wanted to try something different
Infrared
Then i thought about infrared detection through the top vent of the case. The goal is to be able to turn the cube on by waving to it, i.e. passing your hand over the top vent.
The sensor works with two elements. An IR LED that generates an infrared signal out of the top of the vent. Second is an IR Detector, which detects reflected light from an object (hand) passing above the vent.
I found the following little board on ebay that does just this.
http://www.ebay.com.au/itm/350789239727
You can see the LED mounted on the left end of the board, and the detector just above it pointing to the side. Here is how I believe the basic circuit is structured.
Most of the circuit is constructed around an NE555 timer that flashes the IR LED at 38KHz. The board has an adjustment for the IR LED brightness, this affects the sensitivity (range) that the sensor works.
An IR Detector TSOP "chip" itself has all the necessary optics and internal circuitry to discriminate the 38khz signal, thus preventing detection from other background infrared light.
The TSOP takes 5V power, GND, and has a single output which goes low when the signal is detected. This can be wired to the power switch on the MB. It is a drop in replacement for Edison sensor.
The main issue with the board is how to mount it. I choose to mount it horizontally on top of the HDD, so that the LED and detector shine up through the vent. I had to replace the LED and detector, so they could be pointed up. I ordered a replacement for the IR LED and Detector off eBay
Detector - TSOP4838 - 38Khz
http://www.ebay.com.au/itm/260837712263
940nm 5mm Infrared LED
http://www.ebay.com.au/itm/290562020389
Replacing the components wasn't too hard, but you need a fine soldering iron, and I used a "solder sucker", to clear the holes on the PCB. Here is the result after modification
The LED is on the left, and the detector in the middle.