Modulation and Demodulation If an input signal (=message) is imposed onto a carrier signal this process is called modulation. The modulated signal is broadcasted to the receiver. Demodulation is the opposite, where the original signal (= message) is recovered from the modulated carrier wave. Basic modulation types Modulation means how analog or digital information are… Continue reading LoraWAN – Modulation
Category: Robotics
Lorawan – Link Budget and Link Margin
Link Budget and Link Margin A link budget is the sum of all of the gains and losses from the transmitter, through the medium (aka free space), to the receiver in a telecommunication system. It is a way of quantifying the link performance. Transmitter: The radio transmitter value must be specified in dbm, otherwise you… Continue reading Lorawan – Link Budget and Link Margin
LoraWAN – Propagation, Fresnel zone
Propagation is the way radio waves travel through free space (also known as medium). The way these waves travel may impact its signal strength. Line-of-sight propagation The radio waves travels directly from sender to receiver without any obstacles. If the distance between sender and receiver gets larger, the signal will get weaker. This loss is… Continue reading LoraWAN – Propagation, Fresnel zone
TSOP IR Receiver
Overview The TSOP series of infrared (IR) receivers are designed for use in remote control systems. They are optimized to receive modulated infrared signals from an IR transmitter and output a demodulated digital signal. The TSOP receivers are widely used in consumer electronics such as TVs, DVD players, and other remote-controlled devices. Features Supply Voltage:… Continue reading TSOP IR Receiver
DRV8871 Motor Driver
The DRV8871 device is an optimized 8-pin device for driving brushed DC motors with 6.5 to 45 V and up to 3.6- A peak current. The integrated current regulation restricts motor current to a predefined maximum. Two logic inputs control the H-bridge driver, which consists of four N-channel MOSFETs that have a typical Rds(on) of… Continue reading DRV8871 Motor Driver
IC 7805 5V Voltage Regulator
The IC 7805 is a popular voltage regulator integrated circuit (IC) that provides a stable output of 5V DC from a higher voltage input, typically ranging from 7V to 35V. It is part of the 78xx series of fixed linear voltage regulators. The “xx” in the series represents the output voltage; hence, the 7805 specifically… Continue reading IC 7805 5V Voltage Regulator
optional WS2812B Pixel board
The WS2812B is a popular RGB LED with an integrated driver, commonly used for creating colorful and dynamic lighting effects in various projects. Here’s an overview of the WS2812B pixel board, its features, and how to use it: Features Integrated Driver: Each WS2812B LED has a built-in driver, allowing for individual control of each LED.… Continue reading optional WS2812B Pixel board
PCA9685 16Channel 12Bit PWM Board
The PCA9685 is a popular 16-channel, 12-bit Pulse Width Modulation (PWM) controller, often used for controlling servos, LEDs, and other devices requiring precise PWM control. Here’s an overview of the PCA9685 and its features: Features 16-Channel PWM Outputs: It can control up to 16 separate PWM outputs. 12-Bit Resolution: Provides 4096 steps of PWM resolution… Continue reading PCA9685 16Channel 12Bit PWM Board
Types of joints in a 3D printer
In 3D printers, various types of joints are used to enable precise movement and alignment of the printer’s components. These joints are crucial for the accurate positioning of the print head and the movement of the print bed. Here are some common types of joints used in 3D printers: 1. Linear Bearings and Rails Linear… Continue reading Types of joints in a 3D printer
Types of Bearings
Bearings are mechanical components that allow relative motion between two parts, typically rotation or linear movement, while minimizing friction and wear. There are several types of bearings, each designed for specific applications and load types. Here are some common types: 1. Ball Bearings Deep Groove Ball Bearings: The most common type, suitable for high speeds… Continue reading Types of Bearings