Micro:bit Motor Experiments

//Micro:bit Motor Experiments
//Adam Robbins 2017

//Motor via transistor on pin0
//Motor in reverse on pin 1 (via potential divider to halve reading)

let duty: number
let mode: boolean

basic.forever(() => {
    if (mode) {
        pins.analogWritePin(AnalogPin.P0, duty)
        if (input.buttonIsPressed(Button.A)) {
            duty += -10
            basic.showString("-")
            if (duty < 1) {
                duty = 1
                basic.showString(" ")
            }
        } else if (input.buttonIsPressed(Button.B)) {
            duty += 10
            basic.showString("+")
            if (duty > 1023) {
                duty = 1023
                basic.showString(" ")
            }
        } else {
            led.plotBarGraph(duty, 1023)
        }
    } else {
        duty = pins.analogReadPin(AnalogPin.P1)
        led.plotBarGraph(duty, 1023)
    }
})

//Change Mode (Starts on input mode)
input.onButtonPressed(Button.AB, () => {
    if (mode) {
        mode = false
    } else {
        mode = true
    }
})