zacksc
100 W
I am planning to make a new voltage divider throttle to use for cruising on flat terrain, and I thought I would share the design here and see if anyone has any interest, comments or ideas. Essentially it uses a chain of resistors and pots, with a signal voltage coming off between the 1k resistor and the 100 Ohm pot. Here is the proposed chain:
4.8 V------1 k ohm ------signal-------100 ohm pot------100 ohm resistor------1k pot,11 detents------|
The 4.8 volts comes from the controller... The pots are both used as 2-pin variable resistors in the chain (not as 3 pin devices taking a voltage off the middle pin, which I have done in the past, but that tends to make the jumps too big.) I plan to use this with a Baserunner controller or maybe sometimes with a GR4820 (Grinfineon controller). I am thinking of trying to put this in parallel with a T-throttle; see if that works, or, if not, I could use this throttle by itself.
The 11 detent 1 k pot sets the basic throttle output level and the 100 ohm pot allows you to make small continuous adjustments to those. For example, with the 11 detent pot in its 600 ohm position you get 1.97 volts which is a reasonable modest cruise assist; you can bump that up to about 2.1 volts with the 100 ohm pot.
Not that there is anything dramatic or amazing about this design, but I think it is an improvement on just using the voltage from the middle pin of an indented pot, which gives large jumps... The overall resistance value of about 2 k or thereabouts will yield a current of about 2 or 3 milliamps, which seemed about right to me. What do you think?
4.8 V------1 k ohm ------signal-------100 ohm pot------100 ohm resistor------1k pot,11 detents------|
The 4.8 volts comes from the controller... The pots are both used as 2-pin variable resistors in the chain (not as 3 pin devices taking a voltage off the middle pin, which I have done in the past, but that tends to make the jumps too big.) I plan to use this with a Baserunner controller or maybe sometimes with a GR4820 (Grinfineon controller). I am thinking of trying to put this in parallel with a T-throttle; see if that works, or, if not, I could use this throttle by itself.
The 11 detent 1 k pot sets the basic throttle output level and the 100 ohm pot allows you to make small continuous adjustments to those. For example, with the 11 detent pot in its 600 ohm position you get 1.97 volts which is a reasonable modest cruise assist; you can bump that up to about 2.1 volts with the 100 ohm pot.
Not that there is anything dramatic or amazing about this design, but I think it is an improvement on just using the voltage from the middle pin of an indented pot, which gives large jumps... The overall resistance value of about 2 k or thereabouts will yield a current of about 2 or 3 milliamps, which seemed about right to me. What do you think?
