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An Even Better LC Meter Based on the AVR ATTINY861

An improvement over “A Pretty Good LC Meter.”  Enhanced capacitance self calibration, accurate operation without precision components, and only one micro controller. Downloads Download or view the WINAVR main source file: lcm.c Download the complete package including the LCD library: Even-Better_LCM.zip (LCD Library provided with Peter Flurey’s permission) Download Gerd Sinning’s: LCcalc tools for Windows […]

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PCB Exposure Box with Countdown timer using ATMEGA8 microcontroller

Tired of spending hours and hours in wire soldering? Do your circuits look ugly and you are looking for a way to produce professional-like PCBs? Then you had better try photoetching. And the first step to do that is to have the right equipment that is an Automated Exposure Box. Moreover if you like tinkering

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Wireless Coupler Terminal Interface using AVR microcontroller

This is a Minimum Mass Wireless Coupler that connects a terminal, or PC running terminal software, to other Minimum Masss Wireless devices by means of a 1200 baud data channel at 181.818 kHz. The basic Minimum Mass Wireless Coupler technology is described and links to other projects on this site that use the Minimum Mass

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RF Field Strength meter using AVR microcontroller

The hot melt glue that covers the circuit serves multiple purposes: It helps to keep the temperature even among the three transistors (to minimize thermal drift), it protects the components from physical damage, and it holds the battery holder on the board. As I used this probe last nigh to determine if a 384 MHz

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Digital Telemetry using ATMega8 microcontroller

The ATmega8 microcontroller-based Low-Cost Telemetry Device (LTD) is an efficient telemetry keyer. The LTD measures the voltage levels of up to four analog channels via its on-chip 10-bit ADC, converts the measurements to numbers, and then sends the data in Morse code to an external transmitter and to an attached RS-232 terminal. It can be

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LC Resonant Frequency Meter using AVR microcontroller

A well known L/C measurement circuit is pressed into service to make a bare bones measurement circuit. Download the AVRStudio assembly source: lgm031227I.asm Download the AVRStudio hex file: lgm031227.hex Left-to-right: The 5 volt regulator, the LM393 oscillator (a 0.047 uf capacitor is mounted on the LC circuit connector), the AT90S2313, and the serial connector to

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Serial interface with 2X16 LCD display using ATMega8515 microcontroller

The 10k potentiometer, just above the ISP connector near the lower middle of the board, is used to adjust the display contrast according to your vertical viewing angle. DOWNLOADS ATTINY2313/AT90S2313 AVRStudio assembler source. LDCbutons040904Ca.htm ATTINY2313/AT90S2313 AVRStudio assembler source. UPDATED FOR COMPATIBILITY WITH NEWER VERSIONS OF THE ASSEMBLER. LDCbutons040904C_updated_a.htm Truly LCD driver include file.  2x16lcdinc.htm tlcd309Ba.htm

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1 KHz Synchronous Detector using AVR microcontroller

Downloads: Assembler source  deco030511C.asm AVR Studio hex file is deco030511C.hex      Overview This circuit employs a synchronous demodulator to separate a 1 KHz signal from noise and measures  the amplitude of the 1 kHz signals once a second at about 60 microvolts per count then sends the measurements via an RS-232 interface for further

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Morse Code Alarm Clock using ATtiny2313 microcontroller

Morse Code Alarm Clock Modification (Almost) Trivial application of an AT90S2313 or ATtiny2313 in an alarm clock to change the alarm from “BEEP BEEP BEEP BEEP BEEP BEEP BEEP BEEP…” to “WAKE UP” in Morse code. This was designed in response to a request and is in daily use Downloads (Updated 5 December, 2004) AVR

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