Today we finished the OverLoad hardware finally design and now the first OverLoad dummy load is processing, and soon will back in stock.
By using the larger radiator and cooling fan, the OverLoad can work with 3A-12V without any pressure, in our aging test, it bear the 3.5A-14.5V for more than 3 hours and survived.
With the 1% 10W 1ohm power resistor and a 12 bit ADC, now in Dummy Load function, we can reach the 5mV error in voltage and 5mA error in current !
We change the load connecting terminal to the larger one and with the banana socket. Now there is a power button on board, it will make it easy to switch the power supply without unplugging the power terminal.
SD slot and buzzer are the reserved design on board, but they will not be used in first version firmware. But don’t worry about how to upload the new firmware to OverLoad, it’s basic on ATMega328 and with Arduino bootloader, on board we leave a serial interface for Foca, you can use the Foca to update the OverLoad by Arduino IDE.
You can see the bottom view of the board. Please forgive the rough welding, because it’s our hand solder prototyping board. We will publish out the schematic , source code on the product page when the new boards back in stock.
