im currently building a RC car and controlling the left/right steering mechanism using a servo.
Each time i switch on my power supply to power the circuit, the servo tends to jitter abit causing the servo to unwantedly turn
I believe this is caused by the power supply spiking during the transition from off to on when i turn on the circuit using a switch.
In the course of troubleshooting, when I removed the PWM input wire to the motor, the spike was still there when "SWITCHED ON" . however, when i removed the power supply input to the servo, there was no jitter whatsoever when "SWITCHED ON"
This confirms that the culprit is the power supply rail. I tried to add filter caps between the power rail and ground but the jitter did not go away.
Coming back from the lab (like 5 mins ago), I googled to see how I can fix the problem and flyback diodes came-up ..However, fly-back diodes seem to be used to counter the spikes during power-off. My servo does not jitter during power-off but only during power-on.
Is there any way which I can remove this jittering caused by the power rail spike during power-on? thanks=)
ps.s my servos are calibrated to idle at 1.5ms. and at the point of discussion , there are no PWM signals entering the servo. just the power supply and the ground connection.
Each time i switch on my power supply to power the circuit, the servo tends to jitter abit causing the servo to unwantedly turn
I believe this is caused by the power supply spiking during the transition from off to on when i turn on the circuit using a switch.
In the course of troubleshooting, when I removed the PWM input wire to the motor, the spike was still there when "SWITCHED ON" . however, when i removed the power supply input to the servo, there was no jitter whatsoever when "SWITCHED ON"
This confirms that the culprit is the power supply rail. I tried to add filter caps between the power rail and ground but the jitter did not go away.
Coming back from the lab (like 5 mins ago), I googled to see how I can fix the problem and flyback diodes came-up ..However, fly-back diodes seem to be used to counter the spikes during power-off. My servo does not jitter during power-off but only during power-on.
Is there any way which I can remove this jittering caused by the power rail spike during power-on? thanks=)
ps.s my servos are calibrated to idle at 1.5ms. and at the point of discussion , there are no PWM signals entering the servo. just the power supply and the ground connection.
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