Emily VelascoDoes anyone on here know if the capacitor-resistor combo attached to a pwm output pin of an Arduino gives a decent analog output?
People replied a lot while I was sleeping. I''m not going to give the same response to everyone who was asking what its for, so I'll just say it here. I want to use an arduino to spoof the 0-5V analog throttle signal on this ebike i'm building.
As best I can tell, ebike throttle units put out an analog voltage without any kind of data signal, but somehow the e-bike knows the difference between a real throttle, and one made out of an arduino, or even made out of a bench power supply. It will only run when connected to an actual ebike throttle
smells of bikes@MLE_online that's wild and very curious
@smellsofbikes It is! I'm stumped at the moment
Raglan Niall 
@MLE_online @smellsofbikes this beat me a while ago, too. I got as far as figuring out that my throttle was a hall effect type but didn't immediately understand why that was important and so moved on...
If you figure it out please let us know :)
If you figure it out please let us know :)
@Niall @smellsofbikes It shouldn't matter that it's hall effect, since it's ouputting a variable voltage between 1 and 4 VDC, but somehow it does matter. I see other people have undertaken projects using arduinos to create throttle signals on their ebikes, so this must be possible. I just don't see yet what I'm doing wrong
EndlessMason@MLE_online @smellsofbikes the controller normally has 3 wires: 5V; ground & signal. I presume you hooked your supply up to signal and ground? Does the controller also need to see some specific resistance between 5V and gnd so it 'knows' there's a throttle present?
Lab-TediousBastard-Spokane@MLE_online @Niall @smellsofbikes Maybe the e-bike controller also needs a certain level of current with the voltage signal, or maybe it’s really 4-20mA (I know, I know it *should* be a high impedance input).