Recent content by HillCruiser

maybe best to pick up an arduino and pi now as the supply chain for these was seriously disrupted and only now is recovering. It's going to take a while until you're comfortable with using them so a little winter tinkering before you actually need them might be a good idea. The biggest issue I...

No expert here; but I just finished a dual motor build. What worked good for me was a magic pie on the front (with regen braking enabled) and a geared hub on the rear (Bafang in my case) that can freewheel. The direct-drive in the front offers really good braking without the pads touching the...

I looked over the specs of the Adafruit RP2040 CAN Bus Feather and noticed it's a 3.3v board. You probably will need a level shifter to interface to the controller. They are cheap and easy to use but in the long run it might be better to find an equivalent canbus controller on a 5v board.

I have the Arduino Mega 2560 and Pi 4b 8gb purchased from X2Robotics here in Canada; The arduino connects to the Pi using USB; both of these are really robust and play together well. They are both powerful versions that can pretty much handle anything you throw at them. I've been using SQLite...

The nano33 iot's are 3.3v boards. The mega I had laying around, and am now using, is a 5v board and works perfectly. The main issue was the usb port on the nanos. I tried powering from USB and then tried powering them with 12v directly because I thought it was a USB power issue. Both nano were...

I listened to you; now every mile, my onboard arduino/pi calculate, displays, logs and plots the Wh/mile for each motor, the total of the two and the Wh/mile power input of the solar panels; based on the data log of two cycle analysts. I put a bar indicator of the total output and total input...

Just for the record, I wanted to sum up my experiences with the Nanos and where the design finally ended up. I went through several pairs of Nano's and it always ended the same; failure of one of the nano's to upload and intermittent failure to have a usb port assigned by the raspberry pi. I...

My dual-motor ebike has two batteries and a Cycle Analyst for each one. I want to use the autocruise feature on the CA's for both motors so I need an ebrake signal to deactivate the autocruise. Can I parallel the ebrake/ground of two cycle analysts to one Grin Trip-wire?

I was focusing on the motor but the enertia of the entire ebike system as a whole should be taken into account. When the system is at a steady-state condition; constant velocity, constant load, there would be no acceleration factor; so force = mass x acceleration = 0. But wriggling the throttle...

If someone can help me with this, it would be much appreciated: Using an arduino output to control throttle; what is the most efficient way to apply power to a hub motor? I've noticed when I control the throttle when pedalling normally, that my battery seems to drain faster than if I use PAS. My...

I finally got the bike to a point i could power it up. I tested the voltage across the two motor cutoff wires: 0v. I touch the wires together and the controller recognizes it as an ebrake. I'm back to square one as I don't have a similar detection circuit for the nanos :( So I went ahead and...

Right now I have one ebrake motor cut-off switch wired to the front controller and one wired to the rear. (I didn't want a four brake lever bike:) The front wheel uses regen braking. I put the grin tripwire (hard grounding) on the front brake lever so I can cut off the rear controller with the...

I have a grin tripwire switch that I want to wire in parallel to one ebike controller and two arduino nanos. The tripwire has two wires (no V+) that must be signal and ground. So when I hook them into the controller I think there will be controller voltage on the signal wire. If so, I'll need to...

I finally received level shifters to change the cycle analyst ttl output from 5v to 3.3v so the nano33 IOT could read the logging directly. Turns out it was one of the rare mods that worked the first time:) Now that the nano has the direct power feedback from the CA, I can set up a closed loop...

You don't need them until you REALLY need them; I went through the shorted throttle scenario as well. My standard advice to beginning riders is if things start going awry, just pull in the brake. (This applies to experienced rider as well)