This swing has had a rough life. Last week the controls finally had enough, and burned up completely. This left me with a swing that doesn’t rock. On it’s way out it left me a parting gift, it shorted out my new motor…Sigh. So now i have set out to “Make it right” and make my own PWM motor controller. It only took 2 days to design, prototype, and build this little gem. I will have to say that the Rigol scope i bought was the best investment EVER! It’s so easy to use and helps you see what you need, when you need it. I got the parts home and prototyped it, perfect! Now that it works lets make it permanent. I have a few pictures but i will have to upload them later. Needless to say, the cradle is swinging again! My baby is happy once again. Brett did some exploratory surgery on his swing and also came up with how the swing originally operated. I encourage him to edit this post with his videos and information. he has some good screenshots of the output waveforms and such of his swing.
Schematic: Cradle Swing Motor Controller (293)
Cradle Swing Reverse Engineering: