In the good old days when I built up servos from kits there were a few firms about selling servo amps ..I have 4 EFLR 7145s all with dead amps ..following an over voltage experience ! Not bothered about a didgital amp ..a good old analogue would be fine ..bu no one seems to sell these nowadays?
Adrian
Basically Servo Amps died out since microcontrollers can do the job. I designed one once!
http://www.zoomworks.org/oldsite/Winch/BoardElectronics/uber_frame.htm (http://www.zoomworks.org/oldsite/Winch/BoardElectronics/uber_frame.htm)
You can still get the analog ones on Ebay e.g ZN409 (http://www.meditronik.com.pl/doc/plus/zn409.pdf), but very pricey...
http://www.ebay.co.uk/itm/ZN409E-Integrated-Circuit-/400360781666?pt=UK_BOI_Electrical_Components_Supplies_ET&hash=item5d375cb762 (http://www.ebay.co.uk/itm/ZN409E-Integrated-Circuit-/400360781666?pt=UK_BOI_Electrical_Components_Supplies_ET&hash=item5d375cb762)
Alternatively have a look at Openservo (http://openservo.com/)
regards
Andy
Thanks Andy for the info ..yes i have some of the Ferranti chips some where! but they are just a bit too big for my application ...Its a shame maunfacturers dont sell spares for the higher end servos ...throw away society in which we live!
hand a look at the servo site ..but the input seemed to have more than 3 wires ! too many for me!
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Quote from: g4uvz on December 21, 2014, 06:17:45 PM
[...]
hand a look at the servo site ..but the input seemed to have more than 3 wires ! too many for me!
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I dont think you have to use 5 wires. The standard RC servo input is only a pulse where position is a simple function of pulse duration so trivial to do ...
Anyway says it is supported..
http://openservo.com/ServoSignaling (http://openservo.com/ServoSignaling)
regards
Andy
OK Thanks for the info
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