Posts tagged ‘Opto-Isolator’

An Isolated DAC Using PWM Output

Arduino‘s (ATmega328P) PWM outputs via analogWrite can be conveniently turned into analog voltage levels through the use of simple RC filters. Since the PWM outputs are not isolated, using them to drive other devices directly could be potentially dangerous. This is especially true if the target circuit uses a higher supply voltage. Continue reading ‘An Isolated DAC Using PWM Output’ »

Multiplexing the Drive Circuit

I am in the process of converting a remote controlled toy vehicle to an autonomous robotic platform. My initial thought was to just get rid of the existing circuit and add on my own. But after analyzing the control circuit further, I realized I could save some effort by just reusing what was already in place for the movement controls. Continue reading ‘Multiplexing the Drive Circuit’ »