The Low Pin Count USB Development Kit provides an easy, low-cost way to evaluate the functionality of Microchip PIC16F1459 (or other PIC16F145x) 14 and 20 pin USB microcontrollers.
The platform provides all of the necessary hardware, software, and code examples necessary to quickly bring your next USB design from concept to production.
This is what i would use if i have to make a Quick USB Voltmeter or Ammeter.
If you want to do such a project, use Opto-Isolation for High-Energy circuits for Safety. The Analog Value from Attenuator, Shunt, Current Transformer is amplified and converted to frequency then thru opto-coupler reaches uC. This protects PC and User.Be very careful in High Voltage and High Current. Use proper transducers and Isolation to Protect man and machine.
PIC Microcontroller with full speed USB 2.0 interface. Ideal device for battery-powered applications.
“The addition of mTouch(TM) touch sensing compatibility, a 10-bit ADC, motor control PWMs, and a host of serial interfaces make the PIC18F14K50 the perfect device to “Just add USB” to any application.”