Webcam Cooler Fan Controller
I have two outside webcams which need to be monitored for excessive temperatures
in the summer (we see temperatures over 100F in the summer), particularly being
housed in a low profile
The dome is necessary to protect the camera from the outside elements.
Why not just stick a fan in with it? Yes, but if it runs all the time, dust
becomes a problem and, if the fan can't keep the temperature within a certain
range (<110F) the camera would be damaged.
Solution: A PICAXE18x with three ADC readings, one for the actual temperature
inside the dome, one to set fan turn-on temperature, and one to set high level
to turn off the camera until the temperature drops to a reasonable level. The
camera and fan are both controlled by relays. The cameras are Trendnet
and TV-IP110 respectively. The 422 on the left is wireless. Note the
white antenna. It is a pan/tilt camera. Note the control panel in
the picture on the left below. The camera on the right also views a small black
box with a lite LED. There are two leds that flash at different rates
telling me my alarm system and irragation systems are working, or what condition
exists with them. Pretty neat!
I have an LCD screen hooked up temperately until I know what the right settings
are. Once established, I will disconnect if for other projects. There is
also a temporary thermometer hooked up to both to adjust the settings.
Once completed, they will not be needed. There are three LEDs indicating
'camera on', 'fan on', and the center yellow flashes to indicate the program is
running properly. There are two potentiometers to adjust the settings for
fan on, and
temperature camera off.
I had several "cockpit" problems initially-noisy 5v, relay bounce, etc., but
everything seems to be working. I will begin construction of a second unit for
another webcam I have outside.
But, they are both installed and working. Now I just need to wait for the
heat to see if they operate as planned! The schematic for the units is
here. For the program code, go