Lcce meter done in jlcpcb and easyeda atmel community. I have been thinking about building an lc meter for a while since i do not have a multimeter that is capable of measuring inductance and while the multimeters i have can measure capacitance, they are not able to give accurate readings for small capacitance in the range of. I have been thinking about building an lc meter for a while since i. Lcf tension and compression sensor family manual 9 sensor solution source load torque pressure multiaxis calibration instruments software. The measured oscillator frequency and the calculated inductance are displayed on the lcd. For the love of physics walter lewin may 16, 2011 duration. This project is in a very early prototype stage and is at the moment only capable of measuring inductors. In this tutorial let us learn how to interface hc05 bluetooth module with avr atmega8 microcontroller. I am using ponyprog 2000 and isp serial programmer. Note, there should be a 3k pull up resistor on pin 1 and the feedback resistor should be 100k instead of 10k. We will establish communication between android mobile and atmega8 through bluetooth module which takes place through uart serial communication protocol. This tutorial continues on from atmega8 breadboard circuit part 1 where we build a small power supply on the breadboard. The digital component of the project features an atmel avr at90s23. This lc meter design is pretty old but since it is a perfectly good device there was no need to designbuilddebug one of my own.
Avr wide range lc,f, esr meter using avr atmega88papu. The project will show you how to build inductor and capacitor meter lc meter with avr microcontroller atmega32 as main processor. Further, an lcd module is interfaced with the microcontroller in 4bit mode, which. Although we have few other ways to get the current parameter from a circuit, we are going to use resistive drop method, because its the easiest and simplest way to get current.
The first step is to orient yourself with the atmega8 microcontroller. For those who are new to this topic and wish to build this simple esr meter i warmly recommend to read all the four pages because from the first post that i made, there were some significant changes that will improve the esr meter, these changes were contributed and ironed out by the users of the forum, also reading the pages you will find a lot of answers. All accurate lc meter kits already come with microcontroller that is already programmed and ready to be used. Check rb6 input pin, you should see a square wave, try it both when in cap and ind mode selection. Here is another piece of laboratory equipment lc meter.
It measures ower 1uf exactly the double capacity, so 2cap. Digital esr lcf meter from russian micron63 original russian here get sprint and layout demo here. In this digital voltmeter project we are going to design a 25v range voltmeter by using atmega32a microcontroller. I have left the pretty good lc meter page intact because it is a complete project and if one wants to build an lc meter based on the attiny23 or at90s23, this is a very good project for that. Before pic16f628a microcontroller can be used it has to be programmed with a hex code which has to be sent from the computer. Lcf meter 3310lcd electronics forum circuits, projects. The original lcf meter schematic groups a large number of reservoir capacitors together at the top of the page. Naval architecture 1 class notes 1 d w tonnes omar bin yaakob g g w tonnes d w tonnes g 1 g d g 1 g. An even better lc meter based on the avr attiny861 an improvement over a pretty good lc meter. Interfacing hc05 bluetooth module with atmega8 avr. This page describes an arduino based lcf meter inductance, capacitance and frequency, it is based on the lc meter from kerry wong there is a lot of pic based designs available on the internet, but similar to wong, i wanted an arduino based lc meter. Because what we are really meausring is the frequency of the oscillator, we can build a frequency meter using the same circuit at almost no additional cost.
Before each measurement the meter tries to discharge the capacitors in the measuring circuit for a half second. Lipo internal resistance meter, avr atmega8 this atmega8 based device. The meter can be used to measure of inductor in nh range and larger h value inductor accurately and stable enough. The meter uses pic16f876a microcontroller with 16x2 backlighted lcd. No relays, no range switching, a minimum of controls. Avr wide range lc,f, esr meter microcontroller project. Hi al, i have built the lcf meter, on the bench, used the last 16f628a program in a pic. By executing powerful instructions in a single clock cycle, the atmega8 achieves throughputs approaching 1 mips per mhz, allowing the system designer to optimize power consumption versus processing speed. This project is a simple lc meter based on pic16f682a mcu. Capacitance and inductance meter using atmega8 read. To open downloaded files you need acrobat reader or similar pdf reader program.
Service manuals, schematics, eproms for electrical technicians. In this part we will add the atmega8 microcontroller and an interface to allow it to be programmed. Atmels at89c52 microcontroller is used in the present study. In the next step we use the frequency generated by lm311 ic and pass it on to pic 16f628as pin 17. Schematic source code this is the project i am currently working on 20100123. Enhanced capacitance self calibration, accurate operation without precision components, and only one micro controller. I had problems to download the hex file which ericgibbs proposed. A pretty good lc meter based on the avr microcontroller calculates and displays l and c from oscillation frequency using reference components. This project can measure capacitance and inductance using the atmega8 microcontroller and the code is written in bascom avr. I just want to know how to set fuse bits for this project. I probed some hex files from different forums, but any of them worked.
In this project we will control a led using bluetooth of our smartphone. Lc resonant frequency meter using avr microcontroller. Inductancecapacitance meter using microcontroller international. Atmega8 l 2486rsavr0707 overview the atmega8 is a lowpower cmos 8bit microcontroller based on the avr risc architecture.
Posted friday, february 10, 2012 the project pertains to an lc meter based on the avr microcontroller which calculates and displays l and c from oscillation frequency using reference components. This high freq is connected from the 4011 pin10 to the pic pin. Page 8 a guide to noise measurement terminology any questions. In atmega8, we are going use 10bit adc analog to digital conversion feature to do this. So, measure aircore inductors and larger toroid inductors using this lcf meter will be no problem. Hi, i want to make a led driver for my motorcycle but i have some problems with it, the adjustment doesnt really work properly. Capacitance and inductance meter using atmega8 atmega32 avr.
I finished my lcf meter from epe, but i have problems with it. I needed a good lc meter for my one of my next projects so i went and built the famous lc meter by phil rice. As i explained earlier the frequency of the cap osc can be very high at switch on. Its main the task is to process measured data and perform calculations so that the result is real esr value. By executing powerful instructions in a single clock cycle, the atmega8 achieves. Usb esr meter circuit the main part of the meter is a atmega8 microcontroller that controls the entire device.
In this project we are going to make a low range ammeter using atmega8 microcontroller. My previous trials are showing 0v output from the pins 1,6,7,8,9,10,11,this means all the data ports and lcd ports are inactive. In the mode of capacitor, the lcd display capacitor time out. A volume unit vu meter is a standard device that represents the signal level in audio equipment. Digital voltmeter using avr microcontroller atmega32. Vu meter circuit using atmega32 makes the representation process much easier since it avoids the use of any physical medium to establish the connection in between the audio equipment or audio source and the circuit of the project. Capacitance from 100pf to 1 nf on the display and when in inductance mode it displays xxx on it i made the pcbs from pdf file and didnt bothered to compile it with icc avr either. Set and spmen are cleared, lpm will work as described in the instruction set manual. An even better lc meter based on the avr attiny861. The atmelavr atmega8 is a lowpower cmos 8bit microcontroller based on the avr risc architecture. I am working on the epe magazine lcf meter project recently using a pic16f628a. This is done by color coding over the resistor you can use multi meter to measure resistance.
Avr wide range lc,f, esr meter using avr atmega88papu microcontroller. For any daring souls wishing to make an even better lcf meter, use a high speed comparator or something so the oscillator can run at a much higher frequency. First, it depends on the manufacturer of the 4011 that you use. Inductance and capacitance meter, frequency meter, digital voltage meter, frequency generator. The limitations of this project is inductance range. The lc meter is based on elmcie or elsie and other similar lc meters.
The inductancecapacitance lc meter is an electronic instrument that can be used for the. The meter is a perfect addition to any power supply, battery chargers and other electronic projects where voltage and current must be monitored. It is something of a tedious task to crossreference them against the other diagrams to figureout where they belong that is, to figureout which parts they serve. Sylvain bissonnette said that this lc meter has few features. After building and using the pretty good lc meter for a few months, i came to understand some ways in which it could be improved. Avr microcontroller based lc meter eeweb community. Im trying to build the epe lcf meter, but the pic that im using is the 628a. An even better lc meter based on the avr attiny861 cappels. Advancedatmega8code written in bascom avrinterfacinglcd. Lcd is easily added by migrating to other atmel avr microcontrollers. Pdf digital thermometer using atmega8 microcontroller. Volt ampere meter measures voltage of 070v or 0500v with 100mv resolution and current consumption 010a or more with 10ma resolution.
Currently it resides around 500600khz, which is at the maximun for the lm311, but far from the 3,8mhz the atmega8515 can measure. Led which is connected pind7in atmega8 or pind6in atmega32 is to understand whether code each second enter frequency counter loop or not. This type of meter, especially l meter is hard to find in cheap commercial multimeters. Here we will use 10bit adc to build a digital voltmeter. Since we are building our circuit on a breadboard, were. Im not much acquainted with the programs, but i would like to know which pins of the pic are hi and which pins are lo after we turn on the circuit. Please have a look at the schematics of an lcf meter. This section shows the measurement parameters that are available in the optimus sound level meters, the trojan and trojan2 noise nuisance recorders and the dosebadge noise dosimeter.
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