Circuit Lake » Data Acquisition

PetInspect, Wearable Data Logger for Pet

admin — Sun, 25 Dec 2011 01:17:15 +0000

PetInspect is a sophisticated data-logger and wireless communications device that lets you discover what environment your pet experiences and how they behave while you’re not around. The device consists of a 16-bit microcontroller with 256K of flash memory and sensors for pressure, temperature, activity, light and proximity. The digital transceiver provides communication with a [...]

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Simple Automatic Battery Discharge Analyzer

admin — Sat, 29 Oct 2011 01:10:27 +0000

The project allows you to analyze characteristics of unknown/junk battery especially the capacity and variation of the voltage on discharge. It is controlled with a PC via a serial port. No external power supply is required because it is powered by RS-232C signals. It uses ATmega48 as main controller for dummy load and constant current [...]

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AVR Data Logger with MicroSD

admin — Wed, 12 Oct 2011 01:22:39 +0000

This project shows you how to store data into microSD card in files with FAT32 format using microcontroller AVR ATmega32. The MCU receives sensor’s data through internal ADC. You can connect up to 8 different sensors to the system.In this project, Dharmani uses one channel to read temperature value from LM35 sensor and remain [...]

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Digital Caliper with RS232 Interface

admin — Wed, 28 Sep 2011 02:58:57 +0000

This project shows you how to connect inexpensive calipers, micrometers and height gauges to PC through serial RS-232 interface and see the result using PC software. Its main part consists of minimal PIC to RS-232 interface, +5V/-1.5V power from serial port, and 1.5V to 5V logic level conversion. “The connector on the measuring instrument will [...]

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PIC Based EPROM Reader

admin — Mon, 26 Sep 2011 02:58:51 +0000

This project allows you to read many common EPROM and Flash memory chips. It’s equipped with USB interface that uses FTDI USB to serial chip. The PIC18F4550 microcontroller firmware handles the various differences of the range of EPROM chips. The project only uses HyperTerminal PC software to control and read the chips. Intel hex and [...]

Laser Range Finder

admin — Wed, 21 Sep 2011 05:01:08 +0000

This Laser Range Finder (LRF) is a low-cost distance measuring instrument that uses laser technology to calculate the distance to a targeted object. It can measure up to 8 feet away but for optimal measurement the range is about 6 inches to 4 feet. The project is designed by Joe Grand.The main parts of Laser [...]

PIC Weather Station

admin — Thu, 18 Aug 2011 06:29:56 +0000

This Automatic Packet Reporting System (APRS) Weather Station project built based on PIC16F877. It comes with humidity sensor (Honeywell HIH-3610), Pressure sensor (Motorola MPXA4115), thermo meter (DS1621), RTC (For time Stamp) with battery back-up. The project uses 4×20 LCD to display all weather parameters, but you can still operate it without LCD for power saving.Dinesh [...]