schematics of super simple pitch (dc servo motor) controller
Hello
many people asked about a simple pitch controller schematics.
thats what i use normally for quick and dirty servo control. it works quite good.
i use it for pitch and also for turntable motors..there you need big motor.. so electronics needs to be built heavy as well. but principle is the same.
this is very simple and raw. so do your own variation. play around....
most parts can be grabbed from an old computer power supply.
for example case, radiator and fet, diodes. whatever...
almost any FET can be used.
i use normally LM324 quad opamp.
one for the regulator.
one for the reference voltage if i use single supply
one for lpi-meter buffer
and one can be used for propper control voltage
use a 78L05 for accurate control voltage.
attach both wires of the servo motor as close as possible to the opamp.
no ground loops.
use spindle trimmers 10-20 turns. 10k-100k whatever
one switch for 33/45 deluxe will be double switch with led indicator for 33/45 hehe
overcurrent protection with a shunt and one transistor will help.
stop (lock) switch also..
operating voltage 12-24 volts depending on motor you use.
use 100nF-220nF as a start. adjust for stable operation.
voila
happy soldering
many people asked about a simple pitch controller schematics.
thats what i use normally for quick and dirty servo control. it works quite good.
i use it for pitch and also for turntable motors..there you need big motor.. so electronics needs to be built heavy as well. but principle is the same.
this is very simple and raw. so do your own variation. play around....
most parts can be grabbed from an old computer power supply.
for example case, radiator and fet, diodes. whatever...
almost any FET can be used.
i use normally LM324 quad opamp.
one for the regulator.
one for the reference voltage if i use single supply
one for lpi-meter buffer
and one can be used for propper control voltage
use a 78L05 for accurate control voltage.
attach both wires of the servo motor as close as possible to the opamp.
no ground loops.
use spindle trimmers 10-20 turns. 10k-100k whatever
one switch for 33/45 deluxe will be double switch with led indicator for 33/45 hehe
overcurrent protection with a shunt and one transistor will help.
stop (lock) switch also..
operating voltage 12-24 volts depending on motor you use.
use 100nF-220nF as a start. adjust for stable operation.
voila
happy soldering