Cytron Technologies
The FS90R continuous rotation servo converts standard RC servo position pulses into continuous rotation speed. The default rest point is 1.5 ms, but this can be adjusted by using a small screwdriver to turn the middle-point adjustment potentiometer. Pulse widths above the rest point result in counterclockwise rotation, with speed increasing as the pulse width increases; pulse widths below the rest point result in clockwise rotation, with speed increasing as the pulse width decreases.
Features and Spec:
- Analog continuous rotation RC Servo
- Operating voltage: 4.8V to 6.0V
- Lead Length: 200mm
- Max Speed @ 6 V: 130 RPM
- Max Speed @ 4.8 V: 100 RPM
- Stall torque @ 6 V: 1.5kg/m
- Stall torque @ 4.8 V: 1.3kg/m
- Wiring:
- Orange for RC Signal
- Red for VCC (positive of power)
- Brown for GND (negative of power)
- Weight: 9g.
- Size: 23.2mm x 12.5mm x 22mm.
What's in the box?
1 x Micro 360 Degree Continuous Rotation Servo
Well, detecting air quality is getting more important as we need to take care the only Earth that we have. And with the increasing air and environmental pollution, this MQ135 Air Quality Sensor Module will be a good assistant and provide useful information about the surrounding air.
This is sensor module based on MQ135 gas sensor uses in clean air low conductivity tin oxide (SnO2). It comes with basic components to enable the sensor to function properly and hook up easily to any controller that you preferred. When the sensor is kept in their environment, the conductivity in the sensor increases with the air pollution in gas concentration increases.
By using a simple circuitry converts the conductivity changes to analog voltage corresponding to the gas concentration. MQ135 Air Quality Sensor Module for ammonia, sulfide , benzene vapor high sensitivity of the smoke and other harmful monitor is also very good. This sensor can be used to measure a variety of harmful gases and also a low-cost sensors for a variety of applications .
For Arduino, connect DO to any digital pin (if you want it in digital input). Connect AO at analog pin (if you want it in analog input).
MQ135 Spec:
- Detection of gas: Ammonia /Sulfide/ Benzene vapor
- Detection of Concentration:10-1000ppm
- Input voltage: DC 5V
- Power consumption (current): 150mA
- AO output: 0.1-0.3V (relatively non-polluting), the highest concentration voltage is about 4V
Note: After the sensor is energized, it needs to be preheated for about 20S, and the measured data is stable. The heating of the sensor is a normal phenomenon, because there is a heating wire inside.
- Wide detecting scope
- Fast response and High sensitivity
- Stable and long life
- Operating Voltage is +5VDC
- Detect/Measure NH3, NOx, alcohol, Benzene, smoke, CO2, etc.
- Analog output voltage: 0V to 5V
- Digital output voltage: 0V or 5V (TTL Logic)
- Preheat duration 20 seconds
- Can be used as a digital or analog sensor
- The Sensitivity of digital output can be adjusted using on board potentiometer
- The TTL output valid signal is low. (When the output is low, the signal light is on, it can be directly connected to the MCU or relay module)
- The voltage of the analog output, the higher the concentration, the higher the voltage.
- Arduino compatible
- Comes with 4 mounting screw holes (M3 or 3mm size)
- Product dimensions: 32 (L) * 20 (W) * 22 (H)
What's in the box?
1 x MQ135 Air Quality Sensor Module
A Ferris wheel is an amusement ride consisting of a rotating upright wheel with multiple passenger-carrying pods attached to the rim in such a way that as the wheel turns, they are kept upright, usually by gravity. And yes, it is fun too even in a miniature form! This kit lets you build your own miniature Ferris wheel while learning its basic structure and the concept of keeping the pods upright through gravity!
Features:
- Do It Yourself Wooden Ferris Wheel
- Suitable for age 6 years old and above
- Come with everything needed to assemble the Ferris wheel project
- Learn the basic concept and the structure of a Ferris wheel
- Perfect kit to modify and reprogram using a microcontroller while adding LEDs and music (Not included in this kit)
What's in the box?
- Wooden parts for the Ferris wheel structure
- Some double-sided tape
- Some wires
- 1 x AA battery holder
- 1 x Wooden filer (For sanding)
- 1 x DC motor
- 1 x Switch
- 1 x Wood glue
Resources:
- Simple Instruction Manual (pdf) available at https://drive.google.com/file/d/14clwbvLiPeMUWPayF7aKrjFicQ3ixX6H/view?usp=sharing
- Assembly instructions video available at https://youtu.be/5XOO0_VdFPc
This is the TF-Luna from Benewake, it offers range detection from 20cm to 8 meters and it is a single-point ranging LiDAR Distance Sensor, based on the TOF principle. With unique optical and electrical design, it can achieve stable, accurate, and highly sensitive range measurements.
The product is built with algorithms adapted to various application environments and adopts multiple adjustable configurations and parameters so as to offer excellent distance measurement performances in complex application fields and scenarios.
How does this LiDAR work?
TF-Luna is based on TOF, namely, the Time of Flight principle. It emits modulation waves of near-infrared rays on a periodic basis, which will be reflected after contact with an object. The LiDAR obtains the time of flight by measuring the round-trip phase difference and then calculates the relative distance between the LiDAR and the detected object.
TF-Luna supports power saving mode for power-sensitive applications, it reduces its power consumption by adjusting both the current level and duty cycle of the light source. With a 5 V power supply, TF-Luna’s power consumption on Continuous ranging mode is about 350 mW as the light source switch to the highest current level and duty cycle.
Note: Not recommended for measuring the level of liquids. This is because LiDAR relies on the reflection of laser pulses off of solid objects to determine distance, and liquid surfaces are often too smooth and reflective to produce a reliable reflection.
Possible Applications
- Robot: Robot obstacle avoidance, Robot anti-drop protection
- UAV: UAV obstacle avoidance, UAV altitude setting
- Smart City: Smart toilets, Smart trash bins
- Smart Retail: Smart ad trigger, Smart mirror trigger
- Model: Benewake TF-Luna
- Low-cost ranging LiDAR module
- Compact Size for easy deployment in LIDAR projects
- Low Power Consumption for longer usage periods
- Light Weight Design ideal for UAV applications
- High Frame Rate Range Detection through high stability and accuracy
- In-built Algorithms to suit various application environments
- Adjustable configurations and parameters for complex application scenarios
- Easy Firmware Upgradability via the TTL-USB connection with PC
- Operating range of 20cm to 8 meters (90%reflectivity)
- Accuracy: ±6cm at (0.2 - 3 m) 2 | ±2% at (3 - 8 m)
- Distance resolution: 1 cm
- Frame rate: 1-250 Hz3
- Ambient light immunity: 70 Klux
- Operation temperature: -10 ~60 °C
- Optical parameters
- Light source: VCSEL
- Central wavelength: 850 nm
- Photobiological safety: Class1 (IEC60825)
- FOV: 2°4
- Electrical parameters
- Supply voltage: 3.7 - 5.2 V
- Average current: 70 mA
- Power consumption: 0.35 W
- Peak current: 150 mA
- Communication level: LVTTL (3.3V)
- Communication interface: UART / I2C
- Housing: ABS+PC
- Storage temperature: -20 ~75 °C
- Weight: less than 5 g
- 35 x 21.25 x 12.5 mm (L x W x H)
Measurements
What's in the box?
1 x TF-Luna ToF LiDAR Module - 8 meters Distance Sensor
Resources
- Benewake TF-Luna 8m LiDAR Distance Sensor - Datasheet
- Benewake TF-Luna 8m LiDAR Distance Sensor - Instructions Manual
- PC Software
- Wiki page (SeeedStudio) on TF Mini LiDAR which is similar to TF-Luna