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Just to follow up a bit, I have programmed in an exponential speed ramp up (gives a parabolic type of curve rather than a straight line) which helps a lot to smooth out response at low speeds. This is at the expense of sharpened/harder to control response at higher speeds but, combined with...

Yes, mine is around that voltage range (actually 1.17 to 4.80). I tried programming the micro to produce the 1.17 right off the bat and set the top voltage to about 3.0 with a linear ramp-up scale. It helped a lot but, if the start voltage is delivered right off the bat, the controller will...

Thanks for the good info Goeytex. Yes, I bought it new a short while ago and yes, they are selling an unsafe product. I have discussed it with the vendor and they are sympathetic but unwilling to do anything about it. In fact, their head tech support guy told me they have been asking the...

Thanks bhanlon, looks like you may be the only one here that has looked into this. Since my OP, I have taken another look at the ST ESC and associated s/w. The s/w to configure the ESC can be downloaded at no charge it turns out but it requires a bunch of detailed electrical and mechanical...

Hello all, I have a smallish electric ATV (Venom E-Grizzly) with a 48V 1500W, Hall sensored BLDC motor. This machine has IMO poor low speed control in that it starts abruptly and lunges forward to about 40% of the top speed i.e. there is no way to drive it slowly other than abrupt...

Apologies if this has been discussed b/f but I've searched and cannot find an answer. I have read the docs on the new X2 micro-controllers and the program "slots" available seem to imply some sort of multitasking ability. To be more specific, if I have a "pause" or "count" instruction in a...

Have just added another interrupt to my program and realized that interrupts are ANDed before an interrupt is generated. I had assumed they would be ORed (which seems more logical to me) eg. generate an interrupt if pin0 *or* pin1 is high. The only way I can think of doing that is to...

Have found that the following does not maintain the specified minimum value: x = x - 2 MIN 1 Successive executions of the instruction result in x = 5, 3, 1, 255, 253 etc. I suppose what is going on is that 255 is greater than 1 (there being no negative integers) so the condition is considered...

Have just realized that the output driver chip (UNL2803A)that comes with the standard 18 pin project board inverts the output. Does anyone know of an equivalent chip (with same pinout) that does not invert? I plan to use this board to drive four power MOSFETS in a H-bridge circuit so, with...

Just getting familair with PICAXES and would like to use one to control blade pitch on a wind turbine (windmill). Was wondering if the infared input option will generate an interrupt (while the main program is running in the background)? TIA for any help... Laurie Forbes