Engineer from Télécom Paris
Ph.D Thesis from UPMC
Network & Security IT - MI
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Motorized Camera controlled by the telephone
For some years, I lodge different pets at home (Cat, Chinchilla, Hamsters).
Each time I tried to phone one of them, I was unable to understand what he said : I tried but never succeeded in teaching any human language to them. So, I created this motorized Camera controlled by the telephone, in order to supervise them when I'm at my office.
The system is made of 3 parts:
- 1- a private PBX based on Asterisk: this Linux PC is connected to the PSTN. When it receives a phone call, it converts DTMF signals to commands sent into an asynchronous V.24 interface (RS-232-C),
- 2- an electronic box based on a micro-controller that receives commands from a V.24 interface and is able to drive a motor (stepper),
- 3- an USB camera attached to the stepper, broadcasting to the Internet.
Here are the schematics:
command part
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power part
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camera part
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stepper part
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SN476 + L293D both from Texas Instruments
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What about the software parts ? - The assembler code for the PIC is available here.
- In your PBX dial plan (Asterisk configuration file extensions.conf), you need to add the left and right actions (in this example, press 7 and 8 to let the camera rotate left and right):
; stepper
exten => 7,1,System(/bin/stepper-left-digium.sh)
exten => 7,n,Goto(s,begin)
exten => 8,1,System(/bin/stepper-right-digium.sh)
exten => 8,n,Goto(s,begin)
- These shell scripts call /bin/stepper (see stepper.c).
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External Links:
My Former Web Site
Since 04/26/01, I maintain a web site named www.fenyo.net. Since I made many updates recently, click here to access the original content, where old informations are kept. The photo is also from 2001 :-)
Agnes' Web Site
Agnes, my wife, used to maintain a web server but she doesn't anymore. Thus, this pointer is disabled. However, you may contact her on LinkedIn.
Canardou's Web Site
Canardou has always been for me a friend that really matters, helping me in every situation. According to informations currently available, Canardou could be affected by the H5N1 virus. So, for a few weeks, Public Health Bird Regulations have made me forbid Canardou to walk away from our appartement. Feel free to take news about him from his personal home page.
Private Links:
Mail for nuts
Authorized users at domain fenyo.net can read/send mails by means of this cute Squirrel (a friend of Canardou ?).
