RFM69HCW transceiver can go up to 20dBm

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This powerful RF transceiver is also highly secure thanks to a HW support of CRC-16 and AES-128.

The RFM69HCW is a highly integrated RF transceiver capable of operation over a wide frequency range, including the 433, 868 and 915 MHz license-free ISM (Industry Scientific and Medical) frequency bands. Its highly integrated architecture allows for a minimum of external components whilst maintaining maximum design flexibility.All major RF communication parameters are programmable and most of them can be dynamically set. The RFM69HW offers the unique advantage of programmable narrow-band and wide-band communication modes without the need to modify external components. The RFM69HW is optimized for low power consumption while offering high RF output power and channelized operation. TrueRF™ technology enables a low- cost external component count (elimination of the SAW filter) whilst still satisfying ETSI and FCC regulations.

On stock we also keep a less powerful version – RFM69CW, suitable for all applications where a lower range is sufficient.

RFM69HCW transceiver can go up to 20dBm – [Link]

Arduino dust sensor

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Shadowandy’s Arduino-based Dust Sensor project:

Put together a dust sensor using Arduino Mega 2560, Shinyei PPD42NS dust sensor and LCD shield.

The codes and wiring instructions for Arduino Mega 2560 and Shinyei PPD42NS is as follow. However, I did include Serial output so you can view the sampling results using Arduino IDE’s Serial Monitor (9600 bauds).

Arduino dust sensor – [Link]

RELATED POSTS

RS232 To RS485 Module

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RS232 to RS485 Board (R) provides a seamless connection of the PC to an RS485 network.

  • Simplex connection of this interface to the RS485 network
  • Easy way of switching the modes between Receiver and Transmitter ( Slide Switch)
  • 5 V regulated supply provision on board
  • 9-pin, PCB mounted, Female type D-connector available
  • Supply can also be provided by the host interface via Header connector carrying data
  • Four mounting holes 3.2 mm each
  • PCB dimensions 82 mm x 33 mm

RS232 To RS485 Module – [Link]

DTMF Module

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DTMF Development Board offers a very convenient way to generate DTMF tones and demodulate it.  It uses the famous MT8880/MT8888 DTMF transreceiver IC.

  • Easy 10 pin Box Header connector for interfacing data/control pins
  • Crystal derived frequency source for accurate generation and demodulation of DTMF tones for your project
  • Onboard upto 350 mW audio amplifier block for DTMF tones with Volume Adjust Preset
  • 5V Supply sourced via interfacing Box Header
  • Header  type analog connection
  • Four mounting holes 3.2 mm each
  • PCB dimensions 56 mm x 49 mm

DTMF Module – [Link]

RELATED POSTS

Matchbox car

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Shane has been working on making small robots and made a prototype of a matchbox car, a robot car that fits inside a matchbox:

This build consists of a tiny DC motors ripped from a pair of 9g servos, a h-bridge motor controller, an el-cheapo 8 bit pic and a 100mAh 3.7V LiPo battery.

Matchbox car – [Link]

Arduino-based “Analog” slow cooker controller

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Dan Ternes blogged about his Arduino-based controller for analog slow cookers:

With the AC power control figured out, I considered the User Interface. I opted for something simple. The Adafruit RGB LCD Shield would work well as it had both a display and buttons built in. Sure, I could have beat this project about the head and neck with “IoT”-this and “ESP8266″-that, but I was feeling lazy and just wanted a simple timer control. Of course, there’s nothing that says I won’t add some kind of wireless connectivity, but for now, local control is fine.

Arduino-based “Analog” slow cooker controller – [Link]

Tic-Tac TV Remote Jammer

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by DangerousTim @ instructables.com:

That moment you take your eyes off the TV remote for just a second, because of which it falls into the hands of your annoying sibling. Yes, fighting for control over the TV is a daily struggle for many. But the TV Remote Jammer shown in this Instructable, will make everyone else stop dead in their tracks.

This Remote Jammer circuit, in the disguise of an inconspicuous TicTac Box, sends a constant signal to the TV receiver that interferes with the signal from the TV remote. This means that when the Jammer is on, your TV remote CANNOT be used to change channels. It practically blocks all signals from the remote.

Tic-Tac TV Remote Jammer – [Link]

PIC18 Development Board with Ethernet and USB

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by magkopian @ instructables.com:

The development board is based on a PIC18LF4553 microcontroller. The microcontroller features a Full Speed USB 2.0 (12Mbit/s) interface without the need for any external components. Also, it has 32KB of program memory, 2KB of RAM and it supports an external clock up to 48MHz, which is optional because it also has an 8MHz internal clock.

The ENC28J60 Ethernet controller is used to provide Ethernet connectivity to the microcontroller thought the SPI interface. The ENC28J60 has an integrated MAC and a 10Base-T PHY, 8KB of buffer RAM, supports both Full and Half-Duplex modes and it is fully compatible with 10/100/1000Base-T networks.

PIC18 Development Board with Ethernet and USB – [Link]

8T49N004 Programmable Femtoclock® NG with 4-outputs

This design features a fourth generation programmable femtoclock that provides reference frequencies to replace crystals and SAW oscillators in high-performance applications. It is programmable through I2C interface. It has four selectable LVPECL or LVDS via I2C while its FemtoClock NG VCO ranges between 1.9GHz to 2.55GHz. It also meets the standard interface requirements of PCI Express (2.5Gb/s), Gen 2 (5Gb/s), and Gen 3 (8Gb/s) jitter that are low in both clock synthesizers and phase-locked oscillators.

The design is comprised of few components that can be divided into three main areas. First, the I2C interface area that uses optoisolator to ensure the compatibility of the external I2C device to the main clock frequency synthesizer. Second, the main part where the IDT8T49N004I clock generator generates the clock with selectable LVDS or LVPECL outputs. Lastly, the power supply of the device uses a low noise Low DropOut (LDO) regulator that is optimized for fast transient response. It also makes use of reference diodes and capacitor filters that secure the system from possible noise produced from the supply.

The design is applicable to several applications that requires reference clock especially network processors and Application-Specific Integrated Circuits (ASICs). It can improve the overall performance of the device since it makes the device more immune to noise and other undesired system behavior.

8T49N004 Programmable Femtoclock® NG with 4-outputs – [Link]

Irrighino – Arduino Yun Watering System

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Irrighino is a complete watering system, based on Arduino Yun. by lucadentella.it:

The main features are:
a configurable number of solenoid valves
an AJAX web interface
a weekly schedule
manual activation / deactivation

Irrighino – Arduino Yun Watering System – [Link]