Get to know your Stepper Motor and the SAA1042 Stepper Motor driver chip
A while back we wrote an article on the AES IsoLoopsmall loop transmitting antenna. You might want to build your own. To make precision movements on the tuning capacitor you could use a Stepper Motor. (Limited Space Antennas – The Small Transmitting Loop Antenna: How to build your own. Or, using OPL – the AEA Isoloop
If you don’t know what a Stepper Motor is and what it can do for you, then heck, what a great time to find out.
Check out our Mashups page for background on Stepper Motors, the schematic from the AEA IsoLoop controller, datasheets for the two major IC’s, and if, you want to build one from a kit, we have the Ramsey SMD1 Stepper Motor driver kit ($35).
First, what the heck is a Stepper Motor – read about it.
Schematic from the AEA IsoLoop LC-1 Controller
This schematic has few parts and the most exotic parts are only a SA1042 stepper motor driver chip and the a 555 timer.
Datasheet for the SAA 1042 Stepper Motor Driver
Datasheet for the 555 timer
Or, Build from a kit – The Ramsey SMD1 Stepper Motor Driver Kit