DIY Electric R/C Airplane Retracts - Modified Robart 630 Air Retracts w/ controlling electronics! This is a DIY Conversion of Robart retracts by replacing the air cylinder with an gear-motor driven jack-screw type actuator. The controlling electronics include a DC Motor H-Bridge and a 16F688 PIC is used to drive the two H-bridge controller while also reading the current feedback (proportional voltage) from the H-Bridge. This current measurement is used to determine end positions of both actuators, rather than implementing complicated limit switches. Works amazingly well... I will be fitting my electric-powered CMPro 1/4 scale Japanese Zero (A6M5) with these modified Robart electric actuated retracts! More info is at: http://www.e-retracts.com
