The VMAC ESP32 DVT PCB finally arrived, hand populated and nicely oven cooked.
Process started with annotating the PCB SMT component sheet, this making it easier for hand placement. This is a standard process to help assist hand placing the correct components and orientation.
PCB Inspection and basic electrical testing to ensure all looking OK
Populated and out of the oven. Board looking fine and just needs electrical testing.
Inspection under the microscope for any issues and solder flow. No cleaning has been made to the board and it looks good.
Electrical test complete and a first bring up to check power rails. All good and tested OK.
The VMAC ESP32 board has two synchronous buck converters, 5V and 3V3. Small tweak of resistor value will even the LED brightness..
Next placement of PTH components – Relay and RCA connectors. No issues were found. These will left to the user to place in the production version, with optional use of the VMAC BNC Riser.
Due to the RCA physical positions (they are designed to stack side by side), it is important to place the output end first and work up.
The next phase of testing will be to check the video detectors, write and load some test firmware for the ESP32. Then test the OSD, Matrix etc. However, this is all a proven design from the VMAC PiHat.
Overall, very pleased with the board and once fully tested, a production version of the board (identical), will be populated (blue), tested and stock production can start – with planned availability in early June.
Unpopulated boards could be made available, if you wish to do this yourself.