CanSat Rover 2526: Difference between revisions
From wikiluntti
(→Idea) |
(→Idea) |
||
| Line 52: | Line 52: | ||
Power Arduino/ ESP32 from a powerbank. ESP32 | Power Arduino/ ESP32 from a powerbank. ESP32 | ||
* 2.2V to 3.6V input voltage. 3.3V is optimal. Cells around 3.7V (Li-ion) provide ideal voltage. V_in(max) = 16V?? The voltage regulator is AMS1117: may run hot if too much voltage. | * 2.2V to 3.6V input voltage. 3.3V is optimal. Cells around 3.7V (Li-ion) provide ideal voltage. V_in(max) = 12...16V?? The voltage regulator is AMS1117: may run hot if too much voltage. | ||
* 10 mA - 500 mA | * 10 mA - 500 mA | ||
* ESP32 incorporates a regulator that steps down higher voltage supplies to a steady 3.3V output. The common AMS1117 regulator can deliver up to 800 mA, sufficient for most applications. | * ESP32 incorporates a regulator that steps down higher voltage supplies to a steady 3.3V output. The common AMS1117 regulator can deliver up to 800 mA, sufficient for most applications. | ||
Revision as of 08:49, 8 December 2025
Introduction
Mechanics
Folding
1. Rover
Tires and motors
https://www.vcalc.com/wiki/vcalc/rpms-to-linear-velocity
| RPM | Speed (cm/s) |
|---|---|
| 15 | 6 |
| 30 | 3.1 |
| Example | Example |
| 68 | 14.2 |
| 381 | 79.796 |
| Example | Example |
Designs
1
2
2. Boat / Snowmobile
Idea
Aerosled
With tutorials etc https://www.thingiverse.com/thing:4496127
- XXD HW30A 30A Brushless Motor ESC For Airplane Quadcopter.
- Weight: 25g
- Dimensions: 45 x 24 x 11mm
- Price: 6€
- Racerstar BR2212 2450KV 2-3S Brushless Motor For RC Models
- Weight: 52g
Power Arduino/ ESP32 from a powerbank. ESP32
- 2.2V to 3.6V input voltage. 3.3V is optimal. Cells around 3.7V (Li-ion) provide ideal voltage. V_in(max) = 12...16V?? The voltage regulator is AMS1117: may run hot if too much voltage.
- 10 mA - 500 mA
- ESP32 incorporates a regulator that steps down higher voltage supplies to a steady 3.3V output. The common AMS1117 regulator can deliver up to 800 mA, sufficient for most applications.
Powering the sensors and external components separately is highly recommended.
Waterproofing the axle (driveshaft)
Underwater sealing. A rotary shaft seal. Sealed bearing. Stuffing tube. Water channeling. Stuffing box.
The axle passes through an arrangement called a "gland".
- a wide tube filled with discs of material and grease
- a standard lip seal
- magnetic coupling
Marine grease
- https://robotics.stackexchange.com/questions/150/preventing-leaks-in-motor-shafts-for-underwater-bots
- http://www.building-model-boats.com/model-boat-propeller-shaft.html
- https://seaperch.org/resources/library/#build
- https://www.mechanicalseals.net/
- https://ntrs.nasa.gov/api/citations/19670006352/downloads/19670006352.pdf
for submarines and 3d prints, check Making 3D prints actually waterproof https://www.youtube.com/watch?v=Q8x-mjjT8j4
Turning the motor
Use a servo to turn the motor. Eg
