Control category

4 channel RS485 Remote Controller

4 Channel 2 core twisted pair remote controller built using PT2262, PT2272-M4 IC from Princeton technology and MAX485 IC from Maxim. PT2262 is an Encoder (Transmitter), PT2272-M4 Decoder (Receiver) and MAX485 works as bridge for twisted pair communication between encoder and decoder. The receiver provides 4 channel Momentary outputs. All outputs are TTL level and can be interfaced with other circuits or relay board. Transmitter works with 5V to 12V DC. Receiver works with 5V DC.

When any of SW1-SW4 (S1-S4) tact switches is pressed, power is applied to encoder IC and RS485 IC, the encoder starts scanning Jumper J1-J8 and transmitting the status of the 8 bits address and data serially. The decoder IC receives the data from MAX485 and compares it two times with J1-J8 address jumpers, also provides outputs high and at same time VT (Valid Transmission) LED goes On, if the data is Valid and address of Transmitter and Receiver are same. It is important to have same jumper settings J1-J8 at transmitter and receiver to pair both.

4 channel RS485 Remote Controller – [Link]

rDUINOScope – Arduino Telescope Control

Dessislav Gouzgounov @ hackaday.io build an Arduino Due based, open source, goto telescope controller.

The initial idea was to create cheap and easy to build alternative of commercially available GOTO hand controllers, but in a better, feature rich way. In the heart of the system is the rDUINOScope Software, some 2500 rows, controlling all HW components and handling communication with external devices (Stellarium, SkySafari and others) .

rDUINOScope – Arduino Telescope Control – [Link]

6 Channel RF Remote Controller Using CC2500 RF Modules

The 6 Channel RF Remote Controller designed using CC2500 RF Transceiver modules and PIC16F1847 micro-controller from microchip. Transmitter provided with 6 tact switch, 4 Address Jumpers to pair multiple unit so they don’t interfere with each other. Board provided with power LED, valid transmission LED. Project works with 5 V DC, On board LM1117-3.3V regulator for CC2500 Module.  Two in one PCB can be used as Transmitter & Receiver.

Receiver works with 5V DC. 4 Jumper to paring RX& TX units, valid signal LED, power LED, and 9 Pin connector for outputs.  Same PCB is used as transmitter and receiver.  All outputs are Latch Type and TTL 5V Signal for easy interface with other devices like Relay Boards, Solid State Relays.

6 Channel RF Remote Controller Using CC2500 RF Modules – [Link]

Ther Robot Core

Robot Core – The Ultimate Raspberry Pi Robot Controller

The Robot Core, which is a robot control board for the Raspberry Pi and Arduino, brings many different elements into one awesome package. It allows you to efficiently control motors, servos, and read sensor data without needing 3-4 additional boards to hookup. Several Robot Core boards can be connected together in a linear series to add even more functionality.

The Robot Core board
The Robot Core board

Robot Core uses I²C (Inter-Integrated Circuit) to communicate with Raspberry Pi. I²C is a widely used serial computer bus invented by Philips Semiconductor. It is a very easy-to-use two-wire bus that your Pi has no difficulty talking with. A built-in level shifter ensures compatibility to both 3.3 volt and 5 volts I²C buses. The Robot Core supports all Raspberry Pi boards (the past and present versions) and some Arduino boards also.

Now, let’s talk about the technical details.

Software Support:

The board has software provided in the form of libraries and python example programs to get you started fast. Thanks to Second Robotics for making the software Open Source. All required resources will be available in July 2017. Currently, available links are – Drivers and LibrariesSupport Documents.

Software for The Robot Core
Software for The Robot Core
The Robot Core Python Script
The Robot Core Python Script

Motor Drive:

This board provides up to two 5 Amp continuous load DC motor outputs that can be used as a pair to drive a single stepper motor. The Robot Core’s built in safety protection prevents overheating and detects the motor failure.

Servo Control:

The Robot Core can set servos to exact position with the help of 16 bit PWM signal. It has eight ports for both analog and digital conventional servos. You can tune each servo using software-based GUI tuning method and also set their start-up positions individually.

Two ports are provided for connecting Dynamixel servos. Connecting multiple Dynamixel servos at the same time is supported. All functionalities are accessible by simple low-level commands. Many example python codes are available there to get started with Dynamixel servos.

Ultrasonic Sensors:

You can connect up to 4 ultrasonic sensors (HC-SR04) with the board. Given libraries convert measured distance into millimeter. The Robot Core board can provide filtered outputs with higher accuracy or raw outputs with greater speed, the choice is yours.

Analog Input:

Up to 8 12-bit analog inputs are supported for sensors or feedback. Each input has a range of 0-5V and the board also provides protection from exceeding the input limits. The additional analog reading for main power voltage lets you monitor supply voltage in real-time. The Robot Core has configurable warnings for low power.

Power:

The range of input voltage is 6.4v to 14v. An onboard DC-DC regulator is there for generating 5 volts, capable of providing 6 Amps current to the load. Optional separate power supply inputs for servos and for Dynamixel servos are also present.

Other Technical Information:

  • Clear on-board labeling. Each port and screw terminal has its pins labeled.
  • Prototyping space for adding more functionality. This space removable to make the board smaller.
  • Easy to access voltage rails.
  • Access to the Raspberry Pi I²C at 5V logic level.
  • Status LEDs are for main power voltage, DC motor status, and script controllable status.
RobotCore board details
Robot Core board details

Application Of The Robotcore Board:

The Robot Core is an all-in-one solution for many projects. One can do pretty much any autonomous and/or robotics projects with this board. The possibilities are endless. Below are just some example projects:

  • A smart plant monitoring system that reads ambient light, temperature, plant moisture, and even uses two water pumps to water two different plants.
  • Using a single board, you can build a 2 wheeled robot with a ring of 8 analog ultrasonic sensors and a strong Dynamixel smart servo arm.
  • With an IMU (Inertial Measurement Unit) tied into the I²C bus, you can create a two-wheeled self-balancing robot.
  • Build a biped walker robot with sensors to navigate based around the board and a Pi using powerful servos or Dynamixel smart servos.
  • Make an automated greenhouse. Have analog sensors for light, temperature, carbon dioxide, moisture, water leaks, and also control two water pumps.
The Robot Core plant watering system
The Robot Core plant watering system

Cortex-M-based MCUs Set Pace For Automotive Design

AUTomotive Open System Architecture (AUTOSAR) is a worldwide automotive consortium trying to create and establish an open and standardized software architecture for automotive electronic control units (ECUs). However, as is always the case with industry consortiums and standards, they are not endorsed by all interested parties, and, to complicate matters even more, not all applications require AUTOSAR.

With this in mind NXP has launched its S32K1 family of scalable ARM Cortex-M devices together with a suite of automotive grade tools and software. Initially the family will span 128KB-2MB of flash memory. All family members include ISO CAN FD, CSEc hardware security, ASIL-B support and ultra-low-power performance. Check out the demo video.

Block Diagram

In applications where the use of AUTOSAR is not mandated, the S32K platform provides a path for self-development with a free-of-charge, pre-qualified, automotive-grade software development kit (SDK) that enables rapid prototyping with simple drag and drop functionality. For AUTOSAR applications, NXP’s MCAL and OS support has been expanded with new Complex Device Drivers (CDD) and a new S32K starter kit is available free of charge for evaluation.

You can learn more about NXP’s S32K1 product line and the suite of automotive-grade tools and software that support ARM Cortex-based MCUs at the official website.

Source: Elektor

4 Channel Opto-Isolated Module Using High Speed 6N137 Optocoupler

4 Channel Opto isolated board has been designed around 6N137 Opto-coupler, the 6N137 optocoupler is designed for use in high-speed digital interfacing applications that require high-voltage isolation between the input and output. Applications include line receivers, microprocessors or computer interface, digital programming of floating power supplies, motors, and other control systems.

The 6N137 high-speed optocoupler consists of a GaAsP light-emitting diode and an integrated light detector composed of a photodiode, a high-gain amplifier, and a Schottky-clamped open-collector output transistor. An input diode forward current of 5 milliamperes will switch the output transistor low, providing an on-state drive current of 13 milliamperes (eight 1.6-milliampere TTL loads).

4 Channel Opto-Isolated Module Using High Speed 6N137 Optocoupler – [Link]

RELATED POSTS

+9V TO 60V PWM 2.3A SOLENOID VALVE DRIVER USING DRV101

The DRV101 is a low-side power switch employing a pulse-width modulated (PWM) output. Its rugged design is optimized for driving electromechanical devices such as valves, solenoids, relays, actuators, and positioners. The DRV101 module is also ideal for driving thermal devices such as heaters and lamps. PWM operation conserves power and reduces heat rise, resulting in higher reliability. In addition, adjustable PWM potentiometer allows fine control of the power delivered to the load. Time from dc output to PWM output is externally adjustable. The DRV101 can be set to provide a strong initial closure, automatically switching to a soft hold mode for power savings. Duty cycle can be controlled by a potentiometer, analog voltage, or digital-to-analog converter for versatility. A flag output LED D2 indicates thermal shutdown and over/under current limit. A wide supply range allows use with a variety of actuators.

+9V TO 60V PWM 2.3A SOLENOID VALVE DRIVER USING DRV101 – [Link]

64 Key Infrared Remote Controller using PT2222M – NEC Code

64 channels Infra-Red Remote Transmitter circuit build around PT2222M IC, The IC is pin to pin compatible with NEC uPD6122 respectively, the remote is capable of controlling 64 functions keys and 3 double keys. The PT2222M Infra-red remote control transmission ICs using the NEC transmission format that is ideally suited for TVs, DVD Players, Audio Equipment, Air Condition, etc. By combining external diode and resistors, maximum of 65536 custom codes can be specified. The NEC transmission format consists of leader codes, custom codes (16 Bits), and data codes (16 Bits). It can be used for various systems through decoding by a microcontroller.

Features

  • Low Voltage 2V To 3.3V
  • Low Current dissipation: 1uA Max (Standby)
  • Custom Codes: 65536 (Set by optional provided diodes and resistors)
  • 64 Codes (Single Input) , 3 Codes ( Double Input) , Expandable up to 128 Codes through J1 Jumper

64 Key Infrared Remote Controller using PT2222M – NEC Code – [Link]

STEP/DIR SIGNAL TO CW/CWW SIGNAL CONVERTER FOR CNC & MOTION CONTROL SYSTEMS

Simple Circuit converts Step/Dir. signal into to double drive CW/CWW Pulse, Mach3 and few Hobby CNC software’s provides Step/Direction pulse output to drive stepper motor drivers.

Various AC servo works with double CW/CCW pulse. This circuit is solution to interface such AC CW/CCW pulse based driver with Mach3 or other CNC software’s. Circuit designed around 7408 and 7404 IC, board support 5V or 24V supply. Open Collector output can be interface with 24V system by changing output resistors.

Features

  • Supply 7V 24V DC
  • On Board Power LED
  • Inputs and Outputs Header Connector
  • On Board ERTH (Earth) Signal provided for chassis ground to avoid any noise

STEP/DIR SIGNAL TO CW/CWW SIGNAL CONVERTER FOR CNC & MOTION CONTROL SYSTEMS – [Link]

4 Channel Relay Board

4-channel-relay-board-i044-500x500

4 Channel Relay Board is a simple and convenient way to interface 4 relays for switching application in your project. Very compact design that can fit in small area, mainly this board is made for low voltage applications.

Features

  • Input supply 12 VDC @ 170 mA
  • Output four SPDT relay
  • Relay specification  10A/24V DC
  • Trigger level 2 ~ 5 VDC
  • Header Connector for connecting power and trigger voltage
  • LED on each channel indicates relay status
  • Power Battery Terminal (PBT) for easy relay output and aux power connection
  • Four mounting holes of 3.2 mm each

4 Channel Relay Board – [Link]