Astro was made about 10 years ago. I slowly add to him little at a time. His frame is made from thinwall tubing. His motor drive was made from window regulator motors. They were altered with a chain sprocket to make it a good strong chain drive system. I used a old Tandy 1000 EX mother board for it's controller. I like to use this type of computer because it has two game sticks and they are easy to use for addressing in GWBASIC. I use GWBASIC because I can have everything I need on 1 floppy disk and do not have to have a hard drive. Maybe some day when me and Astro get a little smarter we will upgrade my mother board. I also use the printer port and two SK4514b IC (4 bit Latch) to give me 32 out controls. I also made a I/O interface like the one in Radio Electronics (June 1990)to interface my other controls. I made a Speech Recognition board from Jameco Electronics (Part#141401)which works very well.I also made a Heath Voice card (Modle HV-200) for Astos speech that gives him speech. Also from Jameco I made a Parking Radar Kit (Part#129120)for Astos sight. I also made a three axes arm I made from GM ac door position motors. I also installed a strobe light and sirion from Radio Shack. To monitor my robots wheels I used 4 magnets installed around one wheel and use a magnetic switch to count the pulses. Astro cost me around $500.00 because I had alot of the parts. I enjoy learning and programming Astro. I am always learning something new all the time. Right now I am trying to write a GWbasic program using the strig stick commands. Im tring to write a program to move my robot around the room and have it save to file so I can run that file and it will go around the room just as I had done befor. If any of you smart people out there can give me some help I would be so greatfull Email: robander53@netzero.net