I made a simple test routine to control a servo - circuit same as in 'cookbook - servo' but using 4 NimH cells = 4.8V (tried also 4 batteries = 6V) on a breadboard.
If I use my very old (10years) 'modelcraft S21' it works (but this servo is too big).
If I use my brand new 'modelcraft VSD-3' the servo starts oszillating with 2-3Hz back and for - in average it stays on the correct position... I tried to increase the p20 voltage with an CD4049 to the servo voltage but without success. In my RC this servo works correct.
The 'modelcraft VSD-3' is a digital servo which needs much more current... Together with my test-prog analog-in = servo-out (because of noise the analog value is changing a littlebit everytime) the servo has control it's position a lot = high current consumption... The problem was the poor plastic-cell-holder - probably the voltage droped down with the digital servo... Using a soldered accu package solved the problem.
Sven
Important Information for this Arm website
This site uses cookies to store information on your computer.
By continuing to use our site, you consent to our cookies.
If you are not happy with the use of these cookies, please review our
Cookie Policy
to learn how they can be disabled.
By disabling cookies, some features of the site will not work.
Access Warning
You do not have the correct permissions to perform this operation.
Hello,
I made a simple test routine to control a servo - circuit same as in 'cookbook - servo' but using 4 NimH cells = 4.8V (tried also 4 batteries = 6V) on a breadboard.
If I use my very old (10years) 'modelcraft S21' it works (but this servo is too big).
If I use my brand new 'modelcraft VSD-3' the servo starts oszillating with 2-3Hz back and for - in average it stays on the correct position... I tried to increase the p20 voltage with an CD4049 to the servo voltage but without success. In my RC this servo works correct.
Any ideas ?