0-5V LCD volt meter using PIC16F877A

This PIC LCD volt meter project uses a PIC micro and an HD44870 LCD display. The analogue input is taken directly to the analogue input pin of the microcontroller without any other processing. So the input range is from 0V to 5V - the maximum source impedance is 2k5 (for testing use a 1k pot). To improve the circuit add an opamp in front to present greater impedance to the circuit under test. The output imp ...

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Battery Powered Frequency Meter (0 to 20kHz)

The circuit is a simple digital frequency meter that is made of a frequency-to-voltage converter and an analog-to-digital display converter that can be operated from a single 9-volt battery. The TC7126 ADC generates the voltage required by the TC9400 FVC with internal regulators. The TC7126 is designed to directly drive a 3-1/2 digit, non-multiplexed LCD display so no digital conversion is required. The inp ...

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Lux Meter Module

LUX Meter project has been design to measure the illumination.  Illumination is luminous flux falling on surface area of photo diode.  This illumination converted to corresponding voltage using Op-Amp circuit. Specifications Supply 9 VDC PP3 Battery @ 20 mA  Onboard Photo Diode  Onboard preset for calibration  Range selection via jumper 10mV/LUX, 1mV/LUX, 0.1mV/LUX  Interfacing is via berg connector  Power- ...

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lc meter capacimeter inductimeter circuit pic 16f84 auto range lcmeter

The good and high precision capacitor meter (Capacimeter) inductor meter (inductimeter) auto range lc meter for pic 16f84 or pic 16f628 and display lcd by phill rice Construction of an apparel that allows measure inductors (Inductimeter) and capacitors (Capacimeter), knower like LC meter, using PIC (16f84 or 16f628) and display marries in LCD. Translated of the excellent project inductor and capacitor meter ...

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A simple 50 MHz diy microwattmeter using PIC16C84

Summary. A design for a simple microwattmeter. Input range -75 dBm to + 5 dBm. Frequency range 2 to 50 MHz. Level resolution is 0.1 dBm, frequency resolution is 10 kHz. Log-output about 0.5 - 3.5 Volt. Output for external counter. The meter uses a AD606 as log-converter, a MAX186 as ADC, a PIC16C84 as controller and a HD44780 type LCD. The PIC measures frequency and level of the input signal and calculates ...

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Non-Contact Body Temperature Meter

One of the most commonly used medical instruments nowadays is the thermometer. The thermometer is used to monitor or measure the body temperature of a sick person. The idea of creating a thermometer started from a device called thermoscope, a thermometer without a scale. Several inventors developed it until Sir Thomas Allbutt invented the first practical 6-inch medical thermometer able to sense a body tempe ...

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High res cap meter with PIC 16F628

High resolution capacitance meter measures in 0.01pF digits. Total range 0pF to 50uF. - 27th Jun 2011, Updated 25th may 2013. Another PIC based capacitance meter? Although there are a few PIC based "pico" capacitance meters on the internet this design has some advantages over the other designs I have seen; 1. It has very high resolution; from 6 to 7 digits! (Others have 3 or 4 digits) 2. It has a wide range ...

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Trinket Powered Analog Meter Clock

Overview Trinket lends itself very well to building clock projects, its small and easy to hide behind a larger display. And clocks don't need a lot of logic, this example only has maybe 20 lines of code. Adding a digital display via I2C is possible using seven segment or character-based displays (with the library code posted for other projects). This project interfaces Trinket to the the Adafruit DS1307 rea ...

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Very Accurate LC Meter based on PIC16F628A

About Accurate LC Meter This is one of the most accurate and simplest LC inductance / capacitance Meters that one can find, yet one that you can easily build yourself. This LC Meter allows to measure incredibly small inductances starting from 10nH to 1000nH, 1uH to 1000uH, 1mH to 100mH and capacitance from 0.1pF up to 900nF. LC Meter's circuit uses an auto ranging system so that way you do not need to spend ...

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How to Create a Beer Bottle LED VU Meter

Create your own Beer Bottle LED Volume Unit Meter! This instructable will show you how to create a LED beer bottle VU Meter. A volume unit meter is a device that is used to display a relative volume of audio signals. Basically, sound gets converted into electricity, then amplified and run into a dedicated IC (Integrated Circuit). The IC then determines the level of sound and outputs it accordingly onto its ...

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