Search results

your bike is straightforward to convert. You can have front motor, bottom bracket motor or rear motor. The choice depends on a number of factors. - how handy with bikes are you? can you remove the bottom bracket for example? If you can, then you will be OK with fitting. - how many miles you...

thank you for the suggestion. The MCP4725 is good but it does not simplify the wiring. That's why I was attracted to the ESP32 in the first place, it has two DACs, on pins 25 and 26. I only need one to output to the throttle on the 1-4 cable loom.

still don't know if they have got the torque sensor working.

I like the idea of Morse code though. Something like one button, one tap (letter E, half a second) for up, one dash (letter T, one second) for down. Long dash (2 seconds or more) to change torque sensor on/off. Or shout at the arduino's microphone (up, down.., off off). It's easy to wire and...

the Pi Pico RP2040 does not have a DAC to simulate the throttle. I know I can use a PWM pin, two resistors and a smoothing capacitor but for ease of connections, can anyone suggest a small board that has a DAC?

thank you for the suggestions. Finding suitable parts is so time consuming. I need to find a box with the 3 buttons, on/off, + and -. That's why I was thinking of using a touch screen like the Ellegoo or ESP32 + TFT for about £15-£20.

Did you design the box too?

where did you post this project? I'll have a look. This one looks interesting: https://thepihut.com/products/seeeduino-xiao-pre-soldered

It's only because of availability. might try the Ellegoo first. If I could sort out the sensors' inferface, anyone can write their own code using arduino tutorials or micropython and get rid of the proprietary LCD.

I rerad with interest your post in the other thread. Will keep that in mind.

I ordered the parts (arduino, strain gauges + HX711, bottom bracket axle). I will have to source the slip ring later but for bench testing, I don't need the slip ring. The parts will be here in about 10 days-2 weeks. Will post the result and pics here when it's done. In the mean time, I will...

clever. Would anybody mind if I borrow your idea in my next project, say 5 quick left pulls to increase assist level, 5 right pulls to decrease assist level?

You can smooth the ride with code, you can make a statistical guess at the rider's effort. It's done before as far back as the Copenhagen wheel that we discussed years before. Guesses can't replace the immediacy of a torque sensor.

I thought we have to cut our spending.

I like ES but their interests are mainly on how far they can push. I'd lose all my hair worrying about replacing kits under warranty.

as NealH said, you have to try a better controller. Your idea is good but I am afraid that people just want something dependable for as little money as possible. saneagle said that. They would change the assist level or use the throttle on hill. Open the controller you have, find out which chip...

hairsplitting. It's just a mean to preserve the signal. In practice, you need two strain gauges to eliminate the temperature drift and a 24-bit ADC like the HX711 before feeding it to your controller. If I were to do it for them, I would use a slip ring.

You are impossible. Have you used a toll gate rfid tag? So how does that work? edit OK, that's not a very good example. I'll look up a suitable rfid chip to be used as data logger for you. That's what it is. The first one I found is the SL13A. Seems like a good candidate. SL13A (mouser.com)

It's amazing what people come up with if an rfid chip is used to transmit the value of the strain gauge then the fixed coil side is connected to an rfid reader chip. I did enough electronic projects in the past to understand that. I run a computer business for more than 40 years. In the early...

Blacklite, component 16 looks to me like the fixed coil in the Tongsheng design. If you disagree then there is no point for the two of us going in circles. If you agree, then it follows that it has to pick-up the signal from another coil of the same shape and size immediately next to it to...