Hi
Looking for some help from anyone that has experience with this, any useful info or even a ready made alternative. I am in the process of building a robot and require a higher than normal current DC motor driver. As these are quite expensive to buy I want to have a go at building one.
Basically I have a spektrum receiver that runs on 5-6V and outputs a PWM at 22ms, 1ms to 2ms, 1.5ms in 'neutral'.
What I would like to do is turn this in to a useful signal to drive h bridge transistors. Ideally by using cheap components (no arduino etc) and for it to be reliable.
I am wondering if there is a way to monitor the signal then output it in a PWM voltage that could operate PNP or NPN transistors depending on the input.
For example:
Receiver in 'forward': PWM 1.51-2ms ~3.5V
-> 0 to 100% duty PWM at 5v.
Receiver in neutral: PWM 1.5ms ~3.4V
-> 0 % duty.
Receiver in 'reverse': PWM 1-1.49ms ~3.3V
-> 0 to 100% duty PWM at -5v.
I am thinking some sort of timing op amp circuit?
Any thoughts from the more electronic savy or should I just start saving up my money for a proper driver? Lol.
Josh
Looking for some help from anyone that has experience with this, any useful info or even a ready made alternative. I am in the process of building a robot and require a higher than normal current DC motor driver. As these are quite expensive to buy I want to have a go at building one.
Basically I have a spektrum receiver that runs on 5-6V and outputs a PWM at 22ms, 1ms to 2ms, 1.5ms in 'neutral'.
What I would like to do is turn this in to a useful signal to drive h bridge transistors. Ideally by using cheap components (no arduino etc) and for it to be reliable.
I am wondering if there is a way to monitor the signal then output it in a PWM voltage that could operate PNP or NPN transistors depending on the input.
For example:
Receiver in 'forward': PWM 1.51-2ms ~3.5V
-> 0 to 100% duty PWM at 5v.
Receiver in neutral: PWM 1.5ms ~3.4V
-> 0 % duty.
Receiver in 'reverse': PWM 1-1.49ms ~3.3V
-> 0 to 100% duty PWM at -5v.
I am thinking some sort of timing op amp circuit?
Any thoughts from the more electronic savy or should I just start saving up my money for a proper driver? Lol.
Josh