Hi,
i have TX-2B/RX-2B transmitter/encoder and reciever/decoder.
http://www.silan.com.cn/english/products/pdf%5CTX-2B(RX-2B)AY.pdf
it has only few functions: forward, backward, left, right and turbo forward.
so there is no way to make "real speed control" using it, but i'm not going to throw away it
I want to make "some kind of speed control" that has two speed: low and normal.
I have battery pack 6V, and recever/decoder has ~3V in outputs - so one pin is 3V then forward, and other one is 3V then turbo forward.
What kind of simple circuit should i use to send 3V and 6V to DC motor?
First of all ideas was to use MOSFET in linear mode (first guess was):
but this is wrong becouse in this case I want to work MOSFET in linear mode, but then it behaves as resistor and is wasting energy. (ofcourse circuit has some problems: MOSFET should be in low side)
So i did it with PWM (second guess):
capacitor in RC should be ~0.1uF (for simulation purpose it was set to 100uF).
some sort of soft-start is made, but does it work in practice?
How does this circuit looks like? possible to work?
Are any other ideas?
Thanks
i have TX-2B/RX-2B transmitter/encoder and reciever/decoder.
http://www.silan.com.cn/english/products/pdf%5CTX-2B(RX-2B)AY.pdf
it has only few functions: forward, backward, left, right and turbo forward.
so there is no way to make "real speed control" using it, but i'm not going to throw away it
I want to make "some kind of speed control" that has two speed: low and normal.
I have battery pack 6V, and recever/decoder has ~3V in outputs - so one pin is 3V then forward, and other one is 3V then turbo forward.
What kind of simple circuit should i use to send 3V and 6V to DC motor?
First of all ideas was to use MOSFET in linear mode (first guess was):
but this is wrong becouse in this case I want to work MOSFET in linear mode, but then it behaves as resistor and is wasting energy. (ofcourse circuit has some problems: MOSFET should be in low side)
So i did it with PWM (second guess):
capacitor in RC should be ~0.1uF (for simulation purpose it was set to 100uF).
some sort of soft-start is made, but does it work in practice?
How does this circuit looks like? possible to work?
Are any other ideas?
Thanks