Quantity   Component name
1 × MAX471 module Analog current sensor - this will be used to estimate current passing through a USB charge cable
1 × TM1637 4-digit display module Clone of the Grove 4-digit display from Seeed Studio - this can be modified to add more LEDs and buttons
1 × ATTINY85 microcontroller Can be programmed using Arduino IDE and an ASP USB programmer
1 × IRLZ44N Discrete Semiconductors / Power Transistors and MOSFETs - N-channel, logic-level
1 × USB charge cable
1 × USB socket (female) breakout A
1 × USB micro socket (female) breakout