philohome (Philippe Hurbain)

Philippe Hurbain has been measuring LEGO motors, sensors, battery boxes and connectors for over twenty years, and his site is where you go when you need a real number. It also hosts LEGO's own Power Functions protocol PDF.

What it covers

• Hosts the official PF RC protocol PDF.
• The PF Servo teardown; the motor comparison tables; connector pinouts.
• Hurbain co-authored Extreme NXT (with Michael Gasperi) on custom sensors and internals.

The reference for hardware specs: voltages, currents, pinouts, and PWM behaviour. Complements RCX Internals (Kekoa Proudfoot) (digital protocol) with the electrical and mechanical side.

Links

• Site: philohome.com
• PF RC protocol PDF: philohome.com/pf/LEGO_Power_Functions_RC.pdf
• PF Servo teardown: philohome.com/pfservo/pfservo.htm