DC Motor Direction Controller with tact switches

DC_Motor_Direction_Controller_IMG

DC Motor Direction Control project offers direction control using digital logic gates and a DPDT relay.

Features

  • Supply input 12 VDC @ 75 mA
  • Power LED
  • DC Motor Direction LED Yellow/Green
  • Relay Output: up to 7 A
  • Onboard tactile switch for direction control
  • Relay based drive design with diode protection
  • LED indicator for direction indication
  • Power-On LED indicator
  • Terminal pins and screw terminal connector for easy input / output connection
  • Four mounting holes of 3.2 mm each
  • PCB dimensions 41 mm x 81 mm

DC Motor Direction Controller with tact switches – [Link]

ATtiny10 Mini Breakout Board

ATtiny10-MiniBreakoutBoard

Dan Watson has designed a tiny breakout board for the Atmel ATtiny10. The board includes a bypass capacitor, a power LED and a user LED:

This breakout board is for the ATtiny10 microcontroller. The PCB is 0.25×0.325″ and uses 0.050″ header pins. The board could actually be made smaller, but I ran into the minimum PCB size limit on OSHPark. Despite the tiny size, I was able to include a 100nF bypass capacitor, power LED, and a user LED on pin PB1. That pin is also the clock pin for the programming interface, so it flashed when the board is being programmed.

ATtiny10 Mini Breakout Board – [Link]

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High-band DPD Demodulator with Integrated DSA and RF Switch

The IDTF1370 is a digital pre-distortion demodulator (DPD) for power amplifiers linearization in BTS transmitter that utilize the IDT zero-distortion, and glitch-free technology that offers customers an unparalleled high-performance DPD demodulator. It utilizes the technique called pre-distortion, in digital communication it is used to improve the linearity of the transmitter performance by pre-distorting a data to counteract the distortion inherent in the power amplifier. The F1370 has an RF channel range of 1300-2900MHz, it’s IF frequency ranges 20-500MHz, a typical gain of 12.5dB, +41dBm IP3o, and a High/Low side injection. The device features an integrated DPD IC for MIMO, which eliminates the need for external IF amps, baluns, switches, and DSAs thus reduce solution cost and space significantly. It has a reduction of greater that 1-Watt power consumption compared to conventional solutions.

The device has an RF input, standby mode and attenuator setting may be set using the F1370 serial port input. It has a built-in digital step attenuator (DSA) and single-pole-double-throw switches (SP2Ts). The signal coming out of the power amplifier is receive so that the I&Q (In-phase and Quadrature) data at the Baseband can be pre-distorted before being sent to the transmitter’s digital-to-analog converter to counteract the distortion inherent in the downstream PA. The signal coupled from the PA is adjusted via a DSA to a lower level and then sub-sampled at an IF frequency of ~200 MHz which necessitates the need for a highly linear demodulator to downmix to quadrature IF from the Transmit frequency. Sampling IF_I and IF_Q independently and then digitally combining these signals can achieve an effective doubling of the sample rate. Any distortion in this path will degrade the performance of the DPD algorithm. By utilizing an ultra-linear demodulator with integrated DSA such as the IDT F1370, the ACLR and/or power consumption of the full Transmitter system can be improved significantly.

The F1370 is typically used in base station transmitter and receiver for digital pre-distortion demodulator. It is also applicable in industrial, test and measurement, broadband CATV, microwave, and wireless infrastructure and distributed antenna system.

High-band DPD Demodulator with Integrated DSA and RF Switch  – [Link]

DIY Arduino Battery Spot Welder

FSLKFRQIL2C96LD.MEDIUM

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DIY Arduino Battery Spot Welder – [Link]

Raspberry Pi 3 on sale at $35

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For Raspberry Pi 3, Broadcom have supported us with a new SoC, BCM2837. This retains the same basic architecture as its predecessors BCM2835 and BCM2836, so all those projects and tutorials which rely on the precise details of the Raspberry Pi hardware will continue to work.

Raspberry Pi 3 on sale now at $35 – [Link]

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R8856117-01

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New RS Pro ST-80 Soldering Station +150°C to +480°C – [Link]

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Sensirion SDP3

The SDP3x is the world’s smallest differential pressure sensor. It measures just 5 mm x 8 mm x 5 mm, enabling it to be integrated in a range of portable devices.  Measurement range is ±500Pa (±2 in. H2O) and has excellent accuracy and repeatability even below 1Pa. It is calibrated and temperature compensated on the factory and is available in Digital I2C and analog output versions. Sensors have a sampling rate of 2 kHz at a resolution of 16 bits.

SDP3x – world’s smallest differential pressure sensor – [Link]

Arduino NRF24L01 Wireless Tutorial with Arduino Uno

Here is a new video of our friends at educ8s.tv:

Do you want to add wireless capability to your Arduino Projects? Using the NRF24L01+ module is a very easy and reliable way to do so. This tranceiver module works at the 2.4GHz band and it is extremely easy to use with any Arduino board, like the Arduino Uno, the Arduino Mega or the Arduino Nano. The cost of module is less than 3$ which makes this module irresistible!

Arduino NRF24L01 Wireless Tutorial with Arduino Uno – [Link]

Air quality sensor detects microscopic pollutants

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Mitsubishi Electric announced that it has developed a small, high-precision air-quality sensor, the world first to detect all fine particles measuring no more than 2.5 micrometers in diameter, called PM2.5, as well as pollen and dust. It also senses the density of particles precisely.

Scattered light from PM2.5 particles is measured with Mitsubishi Electric’s unique double-sided mirror design, which collects about 1.8 times more scattered light than conventional single-sided designs. An air flow controller provides stable airflow. Components were optimally designed to achieve a small form factor and were carefully aligned to avoid obstructing the airflow and laser beams. Mitsubishi Electric’s original shape-discrimination algorithm distinguishes between pollen and dust based on the respective differences in the optical characteristics of their scattered light, resulting in the world’s first sensor capable of detecting all PM2.5, pollen and dust particles.

Air quality sensor detects microscopic pollutants – [Link]

mavroOBD – Arduino based OBD port module

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Danny Mavromatis has designed an Arduino based OBD port module using Atmel 328P MCU and Microchip MCP2515 CAN Bus controller with SPI interface and MCP2551 CAN transceiver.

The goal of this project it to create an Arduino based OBD port module that can be used to enhance a vehicles capabilites. For example, if you want door locks to close when moving faster than 5mph or to invoke/emulate certain CANbus buttons automatically at start up.

mavroOBD – Arduino based OBD port module – [Link]