We have been buying the B0165 camera from UCTRONICS for some time. The circuit board has the marking UC-599. We use the FSiN pin on this to synchronize multiple cameras.
We bought more B0165’s recently but the boards were different. They have part number UC-788. They also do not have the FSiN pin.
There is a header at the top with a XVS pin. Is this identical?
It is required that the voltage of the trigger signal is 1.8V, you need to convert the 3.3V or 5V to 1.8V. The trigger signal pulse width tFSIN_High is not less than 2us, and the frequency cannot exceed the highest external trigger frame rate supported by the current frame rate.
Is one of these incorrect, or does one correspond to the UC-599 board, and the other to the UC-788?
I can take some pictures when I get back home, but they look exactly like the boards you see if you image search UC-599 or UC-788. I don’t think they’re counterfeit or anything, and they were all purchased from UCTRONICS, which I assume is the OEM, based on the “UC” part number.
I’ve done some experimentation and it appears that all the cameras including the UC-599 may have a 1.8V sync input. I noticed that my signal into the FSIN pin was being pulled down to 2.46V from 3.3. My output has a series resistance of 1.5k, so I thought that was the issue, but I tried turning down the voltage of my FSIN input signal and at 1.8V it is not pulled down. This indicates to me that a diode is clamping the voltage on the FSIN pin to 1.8V plus diode drop.
Without a schematic of the UC-599 board I can’t say whether this will damage anything, or whether my synchronizer system has to be re-designed. It is slightly annoying that I will need a V-reg to reduce the 3.3V which is available down to 1.8V.
