Because I´m not really a freind of PICs I spend some time yesterday to build up a RC-CAM Module on AVR basis. I used an old AT90S2313 for this. After I studied the RC-CAM informations I got the most things working really quickly:
- rc signal is detected correct
- I understand the working of my GSmart Mini 3 Cam
- I wrote some simple routines to set the buttons from the cam to 0 or 1 (with this I can switch on the Cam and take photos)
But I have still a little problem. I will use your photo to explain my prob ...
So what I am doing is the following:
- I set the portpin to 1 / High (in your pic it is G) and the cam switched on
- After 100ms I set the portpin to 0 / Low
- If I want the cam to switch off I set the Portpin to 1 again
And here is my problem: the cam don´t shut down. It is still powered on.
I take my multimeter and measured the voltage at this pin. If I switch on for the first time the pin is at about 4-4,5V.
If I want the cam to switch off there are only about 500-700mV. This is why the cam don´t switch off.
But what is the cause of this very low voltage? If I cut the cam (pin G) from my µC everything works fine. I have always ~4V.
Also I added a resistor (330 Ohm) between µC and Cam (pin G). But the effect is the same.
Has anyone an idea why the voltage is so low in this special case?