Webcam
You want to build your own webcam?
Observe your children or animals?
Also perfect for detectives and spys :-)
Overview
The original project is made by Simon Schulz. .
The Idea is to connect a mobile phone camera to the webserver and steer it by a servo-motor.
We made the nessecary changes to run it on our hardware.
See the thread in the (german) forum here...
Software in the Download-Area...
Sample-Picture of our WebCam:
(Original-Size here 640x480 Pixels)
The Cam is a MCA25.
You can Buy it at eBay (1-3 EUR):
The cam can be simply connected to the serial interface of our webserver.
It needs supply of 3,3- 3,6V. (5V and 2 Diodes). This is already present for the SD-card.
I just connected a small connector and made some wire-connections.
(In the general-purpose-section of our Webserver)
See it here :
It is also possible to connect a servo-motor to move the CAM. ....
Open the cam
Remove the screws....
Move the connector up and down until it breaks off.
...remove the rest of the connector pins with a solderiog iron!
Connect the cables and re-assemble the cam again
Connection to the Webserver
These are the inretesting points (coloured) :
Connection-Overview
Camera |
Controller |
Vcc |
MMC/SD_4_Vcc |
GND |
GND |
Reset |
S1-5 (PD.6) |
Camera Rx |
S1-11 (TxD) |
Camera Tx |
S1-13 (RxD) |
You can directly connect it to the Webserver PCB or through a connector ...
3 LEDs can be useful for debugging purpose:
Connection overview (Debug-LEDs)
LED |
Controller |
Status |
S1-4 (PD.5) |
Clock |
S1-3 (PD.4) |
Error |
S1-2 (PD.3) |
The LEDs are defined in the source code per #define
Connection Overview (Servo)
Servo |
Controller |
Vcc |
S1-10 (+5V) |
GND |
GND |
Signal |
S1-6 (PD.7) |
Changes to the ISA-Ctrl
The CAM operates with a baudrate of 460kB. Therefore we need a special (baudrate) x-tal.
We use a 14.7456 MHz x-tal. 11.0592 MHz or 7.3728 MHz are possible also (with simple changes to the software).
To use the cam parrallel to the MAX232 we changed the resistor R12 from 470R to 10k .
A small capacitor (e.g.. 47uF) between Vcc and GND of the camera will improve the picture-quality...
Notes to the Software
First you should try our HEX-Files for the webserver without CAM.
If they work fine, try the Files for the CAM ...
Sources and HEX-Files availible in the Download-Area.
The default IP is 192.168.0.101 on Port 3333, so you must access it by: http://192.168.0.101:3333
NOTE: The PC must be in the same subnet, e.g.. 192.168.0.99
Ports and IP-Address can be changes in the Sources easily
Check the x-tal frequencies in the main.h
Also the #define ISA_CTRL must be set for our hardware.
© H.Buss - I.Busker - 1999-2007