One week after this circuit surgery, I found another usb charger doctor circuit built around the Holtek OTP MCU HT46R064B (Enhanced A/D Type 8-Bit OTP MCU), circuit board and circuit diagram of which ...

USB data-acquisition modules offer good value and ease of use, whichmakes them an attractive choice for manufacturing test. But before you use themodules in a manufacturing test system, you need to ...

It is hard to program the serial DB9 port, hence I want to replace it with a usb port instead. attached is the circuit diagram, any suggestions would be very helpful ...