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A 10 Bit LED Digital Panel Meter With Auto Ranging Based On The ATMEGA8

Downloads Download the AVRStudio assembly source for the program: M8DPM091109A.asm Download the AVRStudio hex file: M8DPM091109A.hex Find updates at www.projects.cappels.org Overview - A 10 bit digital panel meter for positive voltage only. - Input resistance: about 130k - Ranges: 0 to 10.20 volts and 0 to 102.3 volts. - Over range indication. This project came from friend named Don's need for a digital pan ...

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A SIMPLE MANUAL CURVE TRACER using microcontroller

Measure current vs voltage or voltage vs current over limited range with good accuracy   This was built on a phenolic board which was mounted on a plastic box. The box serves two purposes: It holds the circuit off the workbench, and it makes a nice, stable mount for the potentiometer. Find updates at www.projects.cappels.org I realized that soon I am going to have to measure the voltage as a function o ...

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A Pretty Good LC Meter Based on the AVR using ATTINY2313 Microcontroller

Calculates and displays L and C from oscillation frequency using reference components. No relays, no range switching, a minimum of controls. And it is pretty accurate too! Note: After reading this article, check out the improved, modified An Even Better LC Meter... The 2 line x 16 character LCD shows the calculated inductance and the oscillation frequency. The frequency might be of interest because inductor ...

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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 oscillator was really working or not, I remembered email I received a while ago, asking how to ...

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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 set up either by the RS-232 terminal, in which case, a character str ...

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ATmega8 based RPM Meter

Hello All, Today I will show you how you can make a simple RPM Meter using AVR ATmega8. The RPM meter we will be making is a contact less type, i.e. it measures the RPM of a rotating object without actually making any contact with it. An IR reflectance sensor will be used to sense the speed. You have to attach a white reflective object (like a white paper sticker) at one point in the periphery of rotation . ...

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Low Picofarad Capacitance Meter ATtiny2313 microcontroller

This little instrument, named as Pico C, can be used to measure capacitances down to fractions of a picofarad. It built based on ATtiny2313 microcontroller. It has range: <1 pF to 2000 pF (guaranteed); 2500 pF possible and resolution: 0.1 pF. To read the result, this low cost C meter comes with 2 lines LCD. The project is easy to calibrate with 1000pF 1% reference capacitor. This tiny capacitance meter i ...

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