Schematic PIC Data Logger with Delta-Sigma Converter

The aim of the project is to build a lab-grade data logger with PIC18F45K20 microcontroller and a 20-bit delta-sigma converter. It's named as G5 Data Logger.

This new data converter technology using delta-sigma simplifies the design of high resolution data recording device. One of the interesting chip is Linear Technology LTC2400, 24-bit ADC. Another chip of interest is LTC2420, 20-bit ADC. The chip has pin and data output compatible to the LTC2400. This project uses new data logger using the LTC2420 and use the cheap memory card for data storage.

Download : Schematic, Firmware, Quick start, Brochure, Sample record of TMP36

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Schematic New Generation of Atmel maXTouch

Atmel has announced the maXTouch E Series of single-chip capacitive touchscreen controllers for touchscreens from 2 to 12 inches. The mXT224E, mXT384E, mXT540E and mXT768E devices offer enhanced analog sensing with a third generation capacitive touch engine and Atmel's advanced AVR® architecture optimized for capacitive sensing. Offering 224 to 768 nodes, the new series enables system designers to select the industry's most advanced single-chip solution for their touchscreen size and application.

Atmel maXTouch E Series offers enhanced analog sensing to dramatically improve performance, reduce system power and lower system cost
First single-chip 32-bit solutions for smartphones, e-book readers and tablets up to 12 inches

Since system noise poses the greatest challenge to touchscreen performance, all devices in the maXTouch E Series offer enhanced analog sensing with improvements to maXTouch's industry–leading noise immunity. The enhancements enable system designers to use lower-cost, shieldless touch sensors, or to take advantage of thinner touchscreen configurations with higher levels of integration. These include "touch–on–lens" and "on–cell" configurations, where the touch sensor is patterned on the protective cover lens or on the display panel, respectively.



The enhancements also allow the use of noisy, lower-cost displays and chargers for additional system cost savings.

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Schematic Better Kitchen Timer, PIC16F877

The project aim is to build a better kitchen timer. It has four independent count-up and count-down timers, display of current value of user-selected timer, start/stop and digit entry controls, and alarm buzzer.

The project uses PIC16F877 as main processor. The output part consist of single 7-segment LED display and piezo speaker, while the input part consist of 10-position “BCD” rotary switch, two pushbuttons for set and start/stop, two 8-position DIP switch for timer selection. The project software written in PIC assembly and compile it using gpasm. To write the PIC, it uses XWisp and WLoader.

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Schematic GPS Auditory Navigation

This project goal is to build a navigator that allows a user to navigate to a predefined location through the use of auditory guidance. The project is equipped with GPS, digital compass, and MCU ATmega32 to generate sound based on the direction that the user must turn in order to face the correct direction. One example implementation of this project is a self guided tours navigator.



How does it work?
The module uses GPS and a digital compass to determine at what angle the user hears the sound pulses. On initial start-up the user selects from a number of predefined locations through the use of an LCD screen. Once the GPS has a lock, the module determines the bearing (angle from true North) that the user must travel to get to the destination. This angle is compared with the compass output and a sound is made based on which direction the user must turn to face the final location. The sound consists of short pulses that are delayed between the right and left side and modulated in amplitude to give the effect of direction.

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Schematic Arduino Line Following Robot

The project goal is to build a line follower robot that can follow a dark like, on a light background. It uses an Arduino Duemillanove with the AVR ATMega 328 as main processor. For driving force the project equipped with two Parallax Futaba Continuous Rotation Servos. The robot sensor uses Pololu QTR-6A IR Reflectance Sensor Array. The system powered by 4 rechargeable NiMH Duracell AA Batteries.

 "It first calibrates itself for 5 seconds. You move it across the line a few times so it gets used to the difference in reflectance. After the calibration it begins moving forward", said DuFFxP93, the designer.

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Schematic Arduino Based RFID Pet Feeder

The project shows you how to build a RFID pet feeder based on Arduino and RDM630 RF-reader with a self-made circular antenna. The feeder will opens for the pet that wears a collar with an RFID tag.

 Project feature including : timer-controlled open duration, proximity sensor (Sharp GP2D120) prevents door from closing while the cat is eating, sensors detect whether the door is fully opened/closed, automatic/manual mode switch (on manual it opens with a pushbutton), sliding door using old CD-rom player.

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Schematic Heater Fan Controller, PIC12F675

The Heater Fan Controller built around PIC12F675 microcontroller. It reads the (10k) linear potentiometer and generates appropriately timed pulses to control the DC motor running the fan. The extreme low position cuts the power entirely. This device work as a variable speed control for the heater blower in a car. The project is powered from the existing wiring and connects with just 2 wires. Or you can connect it to 12 volt device up to 10 amps.
"The circuit is relatively simple. The wire to the blower motor (either high or low side) is cut and connection is made to the circuit with the more positive side at the top connection. The diode and 100uf capacitor always provide full 12 volts because the Pulse Width Modulation scheme always provides a minimum 'off' time of the power cycle," said Mondo.

Download : Schematic, Source, HEX

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Schematic Optical String Tuning Tool, AVR AtMega8

Stimmmopped is AVR ATmega8-based project that will assists you in tuning your string instrument to a given tone. It utilizes the stroboscopic effect to give feedback about the adjustment of your instrument. When the frequency that you chose has tone then the two LEDs on the board blink. Two lines are projected at a fixed position on the string when the string vibrates with the correct frequency. If frequencies don't match, the lines appear to be blinking or moving to the observer's eye. The moving or blinking effect decreases with decreasing difference between the two frequencies.
 "The project has two switches to choose the tone and instrument. Switch S1 toggles the current mode of the menu, which is either "choose instrument" or "choose tone". The 7-segment display displays the current selection. In the instrument selection mode, the display is lit up a bit brighter. Switch number two (S2) selects the tone or instrument in the given mode." said Madex (Martin), the designer.


Source Code And Layout

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Schematic AVR Radio Frequency Keypad

The AVR based RF Keypad is remote controller that emits an RF code every time you digit the correct combination on its keyboard. You can use this project to replaces remote controls based on MM53200, UM3750 and UM86409. There are three different combinations for three different actions can be entered at program-time. The keyboard layout also customizable. You can use any matrix up to 4 rows by 4 columns keyboard layout and assigning your own ASCII codes to each key.

 Besides emits RF, you can use it as serial keyboard to PC (requires a polarity inversion) or Basic Stamps by drop off the RF part. Keypresses are available as ASCII codes at pin 3. AVR RF Keypad is designed by Alberto Ricci Bitti

Download : Schematic and Hex File

tags : AVR project, Keypad, Radio Frequency Pad, RF keypad

Project Detail

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Schematic PIC Serial Port Servo Controller

The PIC Based servo controller is a small project that allow you to control some robotics. The project uses a PIC16F84 microcontroller from Microchip to drive servo motors and digital outputs. It receives commands from a host computer via a standard RS232 serial interface.

 To control the servos and outputs we need to send commands to the PIC. Some of the commands are single byte commands; some however require two bytes. The first byte always contains the command and the channel to which the command applies. We will call this the 'Command' byte. The second byte (when needed) will contain data for the command; we will call this the 'Data' byte and is used when we need to set the servo offset or position for example, said Ashley Roll, the designer.

The command byte is split into two nibbles (4 bits), the upper one defines the command to execute and the lower defines the channel (which servo or digital output) is to be affected.

PIC program | Schematic

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Schematic LED Psychedelic Lights

This project aim is to reproduce the old style psychedelic lights system that was very popular in the 70s. Being in the "digital era", the technical solutions adopted are quite different from what was characterizing their predecessor system. Old style lamps have been replaced by three high power LEDs; all filters, previously implemented with analog components, have been realized with digital processing techniques; input stages have been replaced by one A/D converter and one digitally controlled variable amplifier, that is able to warranty the best signal amplitude for the system.

The project requirements are related to technologies adopted: high power LEDs need to be driven with a constant current; digital filters need a fast DSP engine, to be implemented, and an A/D converter is required to transform an audio signal in a numerical representation. Control data communications between central processing unit and external analog components require to have an SPI on board and, last but not least, the capability to link the system with a PC could be very useful for firmware debugging and for tuning some parameters in real time without needing expensive developing tools. The project is designed by Marco Signorini.

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Schematic AVR Electronic Humidor

This Humidor project was designed with a Peltier module and Sensirion SHT1X series sensors. The project built to keep cigars in perfect condition by maintain preferred level of moisture and keep the temperature around 70 degrees. The core of system is based on a microcontroller ATMEGA-16 programmed with BASCOM-AVR. The application is broken into two sections the Menu system that allows configuration of the desired humidity and temperature and what units for temperature you would like to use and display. The Hardware consists of an ATMEGA-16 controller, 7 Tip120 Transistors, 1 DPDT Relay, MC78T12 Regulator, LM7805 Regulator, a few passive components, a 16*2 lcd, and a few connectors.

Tag : Humidity Project, Temperature controller, AVR project

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Schematic PIC based Animation Tile Display

Puzzlemation is an expandable platform of light and animation based on PIC24FJ64GA002. It can be used to create things as diverse as modular animated signs that can be changed by rearranging its tiles, to a uniquely animated puzzle. This project’s display is made of a number of tiles, about 2 inch square with an 8 x 8 array of color LED pixels. Each tile is individually powered and animated, so user can freely pick them up and re-arrange them. To set up a display, the tiles are placed in a special tray. Animations are downloaded into the tray via Ethernet and stored locally on an EEPROM, or loaded via an SD card. The tray broadcasts the animation to each of the tiles, and then synchronizes them.

John Peterson, project designer, said that the display is completely reconfigurable. If the pieces are left in the tray, the animation can be updated continuously over the Ethernet connection. If the tiles are removed from the tray, they’ll display the animation for several hours with their own re-chargeable battery power. Once the animation is synchronized and running on the tiles, user can pick them up and place them anywhere.

Download:

Project Documentation, Source Code and Schematic(zip)

tag : Display, LED, project, PIC, PIC24FJ64GA002, animation, puzzle

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Schematic PIC Mini GPS Logger

This small PIC based GPS logger used San Jose Navigation FV-M8 GPS module. It allow you to stores coordinates, altitude, and speed into an EEPROM. Then a Delphi based windows software converts EEPROM stored data into .kml (Google Earth format). The system equipped with MCU PIC 16F876 to control FV-M8 GPS module, EEPROM, and interfacing to PC. You can use this project for snowboarding, FPV flights, trial bike and hiking logger.

Download : .hex (16F876), Windows GPS Logger, Schematic (eagle)

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Schematic CAN-Servo Controller

This dsPIC30F4011-based servo (position) controller receives commands via a CAN. If a DC motor does not have a rotary encoder, you can plug a contactless magnetic rotary encoder (CMRE) module into the board (via two SIL connectors) and provide (in a self-contained unit) rotary encoder and position control.

Mariano Lizarraga Fernandez, the designer, explains that the board in this project also fully configurable via a CAN network and no power-cycle is necessary for any change to take effect. The board has programmed PID controllers with selectable parameter from user. The controller gains, maximum and minimum pwm commands, and device ID are also configurable. All configuration values are stored in the dsPIC's EEPROM so once it is configured at the full contempt of the end-user, no more changes are required.

Download:
Project Documentation and Schematic (zip)

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Schematic Automatic Plant Feeder

This embedded automatic timed plant feeder system can regularly feed water to your plants for a specified amount of water and also be used as an alarm clock. The project contains the several major blocks: ATmega 323 based CPU system.

To display the time and system states, it use 24x2 LCD. A speaker is used for alarming and making sounds. While push buttons used to change the system states by user. A relay is used to control the AC of the water pump with a DC signal from the processor. For feed pattern, You can setting it up any time.

Tags: Plant feeder, Automatic, MCU project src

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Schematic Arduino Door Lock with Keypad

This is an electronically-controlled dead bolt lock project based on Arduino. It use old CD player second motor that provides a nice linear motion. To use this lock the user need to type in the correct code and presses the # key to open or close the lock. The green LED indicates the door is unlocked. Red indicates locked.

They keypad has 12 keys but only 10 wires. Reading the keypad is not as simple as checking to see which of the 12 switches is closed. The keys must be constantly scanned to see which if any keys are depressed. Scanning the keypad is done by multiplexing through 6 of the wires on the keypad, alternately setting them LOW and then checking the other 4 wires (blue, green, yellow, red) on the keypad to see if a button is pressed.

Watch the arduino lock in action


tag: door lock, linier motor, lock with keypad, arduino project src

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Schematic dsPIC MiniTron Amplifier

The MiniTron is a high end vacuum tube stereo amplifier with efficiency, distortion, and power output enhancements provided by some unique circuitry featuring a dsPIC30F2023 controller IC. The dsPIC is used in this project to create a tracking buck converter whose output voltage tracks the audio signal. The unique SMPS resources in these IC’s do most of the "hard stuff" usually required in an SMPS design, leaving ample processing power available for other activities.

These IC’s and the Avago galvanic isolators are truly the "enabling technology" for this project. The controller IC is also used to perform system health checks, and set the operating points of the individual vacuum tubes. This allows total system programmability, offering several possible preset operating modes.

© George Anderson

Download
Project Documentation

tag : Tube Stereo Amplifier, Audio, dsPIC projec

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Schematic dsPIC 33F128MC706 NUE-PSK Digital Modem

PSK31 is one of the latest communications modes to capture the interest of hams worldwide. Its inherent ability to dig out low, near-inaudible signals is ideally suited for low power QRP enthusiasts. The PSK31 digital modem engine, however, requires intense DSP processing that is only commonly available in PC sound card. Thus the PSK operator desiring portability for field operation is locked into using a laptop computer as a controller, which results in a cumbersome station.

This project shows you design and construction of a standalone, battery-operated digital modem using a Microchip dsPIC microcontroller. The project includes a character display for transmit and receive text data, and a graphic display showing band spectrum and tuning indicator. Using GPL open source software, the modem can be homebrewed for less than $50 parts cost. When coupled with an SSB-capable transceiver or with a popular PSK-xx transceiver board from Small Wonder Labs, you too can have an effective portable PSK31 station.

© George Heron and Milton Cram

Download
Project documentation


tag : Digital Modem, PSK, DSP, MCU dsPIC33F128MC706, Communication

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Schematic PIC Wireless Networks Wifi (Hotspot) Detector

This wireless detector project allows you to sense the presence and relative signal strength of wireless hotspots. It is "always on" and communicates the presence and signal strength of an in-range hotspot by way of sequences of pulses - like a heartbeat you can feel. The stronger and faster the "heartbeat", the stronger the wireless signal detected.

This project consists of a microcontroller PIC 12F629, some custom interface electronics, a small vibe motor, and an off-the-shelf Wi-Fi detector from D-Link. The microcontroller periodically "presses" the button on the detector to initiate a reading. The microcontroller "reads" the output from the detector indicator LEDs and uses this as the basis for pulsing out a signal on the vibe motor, which the wearer can feel.

tag : wireless networks, hotspot detector, Wi-Fi strength signal indicator src

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