Recent content by Mahe

Follow-up. I made another trying using the latest CAv3-2b3 firmware. Unfortunately it did not improve things. Actually it felt more of a kick-start + overshoot than the CAv3-1.5 version. There was even a strange instance of start-and-stop in motor assistance (first half of Zoom 2 and start of...

Hi again, I took some more data from a short trip today -- this time I use my phone with an Android app: "Serial USB Terminal" for convenience, which also nicely provides a time stamp. That way I could plot the figure with the x axis representing the time in seconds. I also attached a screenshot...

Wow, I had overseen this. I just noticed the corresponding menu in the CA. I even set it to 0.04. And bingo, gone with the averaging. And gone the delay between throttle output signal and PR current (and bike speed). The figure below shows the unloaded bike response to throttle input: throttle...

Hi @amberwolf, thanks for the hints. As far as I understand, some of the tools you cite use the TTL output from the CA, which I also used for data acquisition. I used a pretty tried and tested tool (putty) for the serial USB reading so I wouldn't expext any issue there. To me this points to an...

Hi @amberwolf , first of all thank you very much for the prompt and thorough reply. I'll try to be as thorough in mine. I intended it more in a psychological sense, including some of the processing to make sense of the perceived signal. In the RPM case, that would be the counting of the...

Sorry for the petty correction, but pi=3.14 radians is only half a revolution

Hi, I have been running a GMAC + Phaserunner + Cycle Analyst (all 3 from Grin) + Sempu T2 torque sensor (Aliexpress) for a few years now and while the overall performance is generally good, I have been frustated with the torque assist. The main issue is a delayed response of the motor after a...

Thanks @teklektik, 8 years later, this post was still very useful: I confirm this was very simple using putty on Ubuntu Linux. I used the CA utility to check the USB port number, which for me was /dev/ttyUSB0 On the main putty screen, I had to select "Serial", which let me enter the USB port...

Ok, I'll give it a try then. Many thanks for the advice. PS: looks like a working DIY build !

Here another idea how to modify an existing, digital e-brake lever into a linear output: https://www.youtube.com/watch?v=ZcjtN6g1BzI (@stancecoke or anyone else: any hint where to purchase linear output lever for electric V-brake most welcome...)

Thanks much for your prompt replies. Thanks for the recommandation. It's hard to see what the technical specs for that brake lever are (input and output voltages) but I 'll look that up. I also forgot to mention: it's important that the lever actually pulls my V-Brake cable. The main reason...

Just as a follow-up, I made last year a try with the components suggested by @Nixunen (hall sensor A1324LUA-T and -- I think it was -- radial magnet 9027). Here just as a proof of concept, I taped the sensor on the fixed part of my brake lever (some lower or mid-range shimano brake lever) and...

Hi ! May I ask why you swapped? I just received a G020.500 kit, and it is pretty small in size and weight... Is it so noisy? (as mentioned by https://endless-sphere.com/forums/viewtopic.php?f=3&t=110859&p=1624919&hilit=g020+500#p1624839) I have yet to get it running, that's why I ask (display...

Looking at the datasheet, https://www.victronenergy.com/upload/documents/Datasheet-SmartSolar-charge-controller-MPPT-75-10,-75-15,-100-15,-100-20,-100-20_48V-EN.pdf the Victron 100 | 20 48V takes up to 1160W for a 48V kind of output (it actually takes 60V batteries, maybe even 72V as far I can...

Hi k2orbust, (edited a previously erroneous post) it seems that you are right. The victron i was talking about (100 / 20 48V) does NOT work as boost controller, and requires a voltage +5V more than battery voltage to function. FYI, a friend who participated in thesuntrip.com used genasun. If...