User manual

Fig. 8: Smoothed PWM output voltage

4 Analogue-Digital Converter

A connection E2 to GND and pushing the reset button will start a small example programme for

the analogue-digital converter (AD-converter). The analogue voltage at the analogue input AD1

is measured and converted to a digital numeric value. Because the TPS controller works with 4-

bit values continually, the result of the analogue-digital conversion is a number from 0 to 15. The

result 0 represents the input voltage 0, the result 15 for a voltage that corresponds to the

operating voltage, i.e. e.g. 4.5 V. The AD-value is output as a binary number at the four LEDs

and additionally handed over to the PWM-output. Connect a voltage divider from a fixed resistor

and a light-dependent sensor resistor (LDR) to the analogue input AD1.