solarbbq2003 wrote:just going back to changing crystals/resonators ( I think was earlier in this thread), have noticed there are 2 pin and 3 pin resonators used ( ceramic type ), 3 pin have built in caps set up the oscillations, 2 pin type need caps in circuit with the resonator to set up the oscillations. Just wondering if any one playing with these knows if different picofarad value caps go with different frequency resonators, if there seems to be a problem with going to higher freq say 40mhz i'm wondering if the associated cap values might be an issue in getting the correct oscillations ( or maybe some chips just wont accept the higher frequencies)
Knuckles wrote:That is a Bafang Motor? Direct from from Bafang? Dom ... How the heck did you manage that?
fechter wrote:The voltage regulator section is an interesting cascaded LM78xx linear regulator design.
They seem to run quite hot, and I would be inclined to put some heat sinks on the regulators.
Here's the basic layout:
The 5v processor control power starts to crap out at around 40v input in the stock configuration.
By jumpering R1, you can go down to around 30v (50v max).
By jumpering both R1 and R2, you can go down to 15v (35v max).
Here's the location of R1 and R2:
Can someone body explain this a little to me?
When I hit the throttle, the motor doesn't react up to a certain point, where the motor starts pretty fast. This means going at low speed is impossible. It's like a minimum speed for the controller. Is that what is meant here?
"30V (50V max)" does this mean I can then go slower, but high speed will be less than before, too? Like limited to max 50V?
(I wouldn't want to limit my top speed)
Thanks for any help
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