interfacing Archives - Page 15 of 54 - Projects Tutorials Code Library for Atmels Atmega32 AVR

A Microcontroller Based Digital Lock-In Milliohmmeter using ATtiny2313 microcontroller

A milliohmmeter is just the tool for checking trace resistance on a printed circuit board, tracking down shorted traces, and measuring the contact resistance of a switch or connector. Its the kind of tool that would come in real handy occasionally, but not often enough to justify shelling out hundreds of dollars. Wanting one anyway, […]

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Dutchtronix AVR Oscilloscope Clock using Atmega328 microcontroller

Hardware features: Connects to your analog scope in X-Y mode using BNC cables or probes (1x, 10x) Uses the Atmel AVR Atmega328p with 32KB flashmemory On board 5V power regulator for use with user provided wall adapter (8-15V DC center positive) Power plug (5.5mm outside diameter) included On-board Real-Time Clock with 32.768kHz crystal and battery

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TRUE RMS-TO-DC Adapter For DVM using microcontroller

AVR ATmega Projects, Metering - Instrument Projects / Ibrar Ayyub

Specifications Input: AC, DC or AC+ DC to > 10 KHz Ranges: 200 mv, 2V, 20V, 200V, 600V full scale Accuracy: ±1%, depending on divider resistor selection Crest Factor: 1 to 3, up to 5 with degraded accuracy Input impedance: 1 Megohm shunted by 20 pf Battery drain < 300 uA Introduction The DVMs in

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MMC/SD/SDHC AVR Interface using ATMega8 microcontroller

AVR ATmega Projects, Interfacing(USB - RS232 - I2c -ISP) Projects, Memory - Storage Projects, Security - Safety Projects / Ibrar Ayyub

MMC/SD/SDHC card library This project provides a general purpose library which implements read and write support for MMC, SD and SDHC memory cards. It includes low-level MMC, SD and SDHC read/write routines partition table support a simple FAT16/FAT32 read/write implementation The circuit The circuit which was mainly used during development consists of an Atmel AVR

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A Pretty Good Wattmeter For Bench Use using microcontroller

AVR ATmega Projects, Metering - Instrument Projects / Ibrar Ayyub

Briefly, • AC True Watts using two quadrant multiplier • Optimized for 120 VAC (can be changed) • 15 watt full scale (can be changed) • Uses DVM floating on AC Neutral as display • Requires moderately high level of analog circuit skill • Very inexpensive Find updates at: www.projects.cappels.org Introduction I am doing some

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RS-232 Freq. Meter/Pulse Generator Based on Atmel ATtiny2313 using microcontroller

AVR ATmega Projects, Metering - Instrument Projects / Ibrar Ayyub

Simplicity in circuitry was the design direction. Zero mass (firmware only with no physical components) would the ultimate achievement. This instrument doesn’t have any front panel controls because the user interacts via an RS-232 terminal program at 9600 baud. I needed a frequency meter for my experiments in Nondu, Thailand, where I really don’t have

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Analog audio panel for PC using ATMega328 microcontroller

AVR ATmega Projects, Sound - Audio Projects / Ibrar Ayyub

Have you ever struggled with audio settings in control panel in middle of a VoIP call? Or, wondered if the other guy can hear you properly? I have. My work requires great deal of remote conference calls using PC. The first thing I wonder always when starting is if my audio settings — mic volume,

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Preamp and 330 + MHz Prescaler for A Little More Serious Frequency Meter using microcontroller

AVR ATmega Projects, Metering - Instrument Projects / Ibrar Ayyub

Overview After finishing Little More Serious Frequency Meter I had planned to make a suitable preamp and prescaler for it, and set about to gather ideas and parts. I was inspired by one fellow who had built the meter and the 2 line X16 character LCD display to show the output, succeeded in designing a

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A Little More Serious Frequency Meter using ATtiny2313 microcontroller

AVR ATmega Projects, Metering - Instrument Projects / Ibrar Ayyub

This is design for a frequency meter based on AVR microcontrollers. Maximum input frequency is specified to be 30 MHz in the multi-chip configuration, and in single-chip configuration, there are both 5 MHz and 10 Mhz versions operating with 10 and 20 MHz crystals, respectively. All versions have 9 1/2 digit resolution. I have used

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HF/VHF/UHF TEST OSCILLATOR using microcontroller

AVR ATmega Projects, Metering - Instrument Projects / Ibrar Ayyub

Its built into a plastic project box with an aluminum cover (on the bottom). The controls are as follows: Large golden knob is coarse tuning, small black knob with a blue index stripe is fine tuning, the green LED is the power on indicator, the slide switch is the on/off switch. The small black knob

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