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Originally Posted by neilcooper
I was wondering if it would be possible to make a circuit that would control a victor with a pot from full reverse to full forward? If possible using a 555 timer?
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After all of the interesting discussion of 555s I'm not exactly sure if you are more interested in building a PWM controller from a 555 or if you are more interested in a PWM controller just to test your Victors.
If it is the latter and you just want to buy something off the shelf, may I suggest the FMA Direct Servo Lab. You can get it from Tower Hobbies (
http://www2.towerhobbies.com/cgi-bin...?&I=LXJVD9&P=0) or other hobby places for less than $35. It is really useful for testing Victors and test driving motors connected to a Victor (and power) without having to have the whole IFI control system hooked up. It also will "read" the PWM signal from the IFI Robot Controller which can be very useful to see how the joystick and code are responding. You can even hook it up in line between the RC and the Victor. Works great, I highly recommend one. If you get one you will need to get a cheap RC battery as well if you don't have one.
Another COTS option that is a little less expensive (~$20) is the Astro Flight Servo Tester (
http://www2.towerhobbies.com/cgi-bin...&I=LXVK79&P=0). I don't personally have one of these but it should do what you want (manually control the Victor) but it will not "read" the PWM signal from the RC like the FMA Direct Servo Lab.
Now everyone can get back to discussing the pros and cons of a 555...