Recent content by e3s

can you try eve 26v? They are inside some xiaomi scooter battery packs

When tsdz2_vin is positive, bts4140n is on? Bts4140n enables bsp296, right? Is P1.00 positive?

Hello I see in the project a power switch and a transistor for the wireless controller. what are they for?

for reference only this devices has also lev Garmin edge 520 plus edge 530 edge 820 edge 830 edge 1030 edge 1030 plus edge explore edge explore 1000 edge touring plus o-synce usee coachsmart lev Selfloops Android ANT+ sigma sport rox 12.0 sport wahoo elemnt roam

For reference here there is the difference between various nrf52. i was looking for cheaper one but cheaper means less functions. https://infocenter.nordicsemi.com/index.jsp?topic=%2Fstruct_nrf52%2Fstruct%2Fnrf52.html

Nice. Simple and easy. If I can suggest you can put + and - near the variable to change it or a slider or choose it with the keyboard. There are many options to choose. Further in the development a vertical slider on the right (or on the left for left-handed) in the main screen to change the...

There's runtastic

For the stepper motor driver I suggest drv8825 it's cheap, 80 cents.

Good idea. For now I'm looking for buying the joint and the thrust bearing, it could be useful to buy different stepper motor to verify the limit of the torque required. This varies also from the friction of the shaft. The friction is not also the same. Example bronze threaded rod has lower...

Let me suggest to buy a dc dc boost, it's cheaper

not the full travel but only to change a gear (or also two gears,), pull 5 mm of the cable to change the gear with a sram or the half for shimano. It is sufficient to see the weight to pull from the second to the first gear. It's the hardest to pull. Obviously with the chain not without it...

The problem is this: to change the gear in a certain amount of time there's a need to have a fixed power. If you have a motor with 1000rpm with a gear 10:1 that changes the gear in a second, it will consume the same power of a motor with 100rpm and changes. The gear in a second. So there are...

For now I'm searching a stepper motor that has a constant torque curve, not less than 8 N.cm Nema8 is a bad choice because it has 4 N.cm. Too low. I'm asking if someone has a balance to measure how many kg are needed to change the gear pulling the cable... I apologized 5 kg but I'm not sure.

I practically thought of two projects: a linear servo as we have already seen or a motor with a screw that turns a round gear and you can also print this in 3d. It's more compact but fragile. If you think about the compactness you have to say that there are also disadvantages. I would prefer a...

I'm curious to see a stepper motor directly in a sram derailleur Anyway a nema stepper motor has enough torque. I read that some linear slide has only a force of 500gr at 360rpm. Maybe is not enough