Sep 17, 2011 this lc meter was built using a microchip pic 16f628a. This article describes the design and functioning of a simple circuit using a 555 timer and a microcontroller. Pic16f84a microcontroller based lc meter eeweb community. Lc meter using a microchip pic 16f628a hacked gadgets diy.
Diy precision lc meter with a pic micro project time for. Yes great with a cheap rate we can build an inductance calculating meter. Accurate lc meter kit this kit comes with all the components including programmed pic16f628a microcontroller chip, lcd display with green backlight, switches and all the other components that are. Digital smd tester 6000 counts smd meter handheld resistance capacitance tester lcr meters with spare test leads and pocket case. The lc meter is actually an lc oscillator based around the familiar comparator circuit lm 311. It includes high quality doublesided printed circuit board pcb with red solder mask and presoldered tracks for easier soldering, lcd display with yellowgreen led backlight, programmed pic16f628a microcontroller chip, high precision capacitors and. When the power is applied the lcmeter will enter menu 1.
The most challenging part of the project was to program the entire floating point. A freemat library for the freemat mathematical modeling software similar to matlab resources a collection of references including. Ekusehe bangla designed his own diy lc meter based on the pic16f628a micro. Special edition lc meter kit includes top notch high precision components that are only found in premium quality kits.
Based on the lc meter brazil version hardware and software. Dec 11, 2019 so i decided to make an inductance meter using arduino uno ic atmega328p. Choosing a backup generator plus 3 legal house connection options transfer switch and more duration. In the first of them, there is 1nf1% capacitor and in the second 22uh10% inductor. My last homebrew projects were back in the days of the 555 741 and bc109 and 2n3918 so this looked great for its simpleness but its too inaccurate if my silver mica test was anything to go by. Pic frequency counter with frequency lock function. We will use the well known parallel resonance formula see formula 1. Pic16f84 lcd display lc meter circuit box front waisted measure be careful when buying the box to cut the picture box paste it on top and falcata or drawing a knife then stop in the box bourdu to keep the four m3 screws and nuts, use bordt using the reader relays internal diode line is im a little late, i realized i did board relay leg. It would make life a bit easier when attempting to identify a few of those components that are always left over on the desk after building a project.
This is an lcd library for 8 bit pic microcontrollers written for the xc8 compiler. The goal of my hard work is to people get success in a. Very accurate lc meter based on pic16f628a using pic. Usb voltmeter is a pc based dual channel voltmeter built around pic18f2455 pic18f2550 microcontroller that measures voltage from 0.
Remanufactured lc meter packing gland identification pmp pn 28019 pmp pn 28020 for pmp 28009 meter for pmp 28008, 28010 meters fork drive, no gear blade drive, 24tooth gear gilbarco t1862106 lc 451, 49525 note. Very accurate lc meter based on pic16f628a pic microcontroller. The oscillator design originally came from the aade lc meter web page. The analog input to pic is limited to vss and vdd voltages 0 5v of pic. We changed the design to pcb of this device too, to fit in a smaller box, and started using an smd format for most components. This design is a simple lc meter that accurately measures the inductance and capacitance. In arduino lc meter project, we will show the inductance and capacitance values along with the frequency over 16x2 lcd display. Im not au fait with pic wizardry but i couldnt resists trying this as im desperate for an accurate lc meter.
It is great software, however, i do find microsoft office a bit more full featured and easier to use. This lc meter was built using a microchip pic 16f628a. So i decided to make an inductance meter using arduino uno ic atmega328p. This design is little different from other designs found on the internet.
The original idea seems to have come from bill carver. Using pic16f628a for a modified lc meter eeweb community. Most multimeters have a capacitor meter, but very few have an induction meter. The circuit is built around a pic 16f84a microcontroler, or its replacement 16f628a. An lc meter circuit is used to measure value of a reactive element like a capacitor or an inductor. The unit will always remember the last settings even if power is switched off. Adc module of pic microcontroller converts the signals on its analog pin to 10 bit binary data and it has software selectable high and low voltage reference input to some combination of vdd, vss, ra2 and ra3.
Yet another lc meter using pic16f628a embedded lab. Having inspired from surprisingly accurate lc meter. Oct 14, 2015 an lc meter circuit is used to measure value of a reactive element like a capacitor or an inductor. 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.
The l and c values are computed from the resonant frequency of the lc tank circuit. It includes high quality doublesided printed circuit board pcb with red solder mask and presoldered tracks for easier soldering, lcd display with yellowgreen led backlight, programmed pic16f628a microcontroller chip, high precision capacitors and inductor, 1% metal film. Remanufactured lc meter packing gland identification. Easy to operate, easy to see, and configurable to your industry or application. Now all that is needed is a 4 pole rotary switch with 3 positions. Like the aade meter, phils design used a pic microcontroller as a frequency counter, doing the necessary calculations in software. Open source software or freeware i use to build my projects. Usb voltmeter is selfpowered drawing very little current from usb. The firmware does not include critical firmware modifications and all calculations are performed just like in. Pic volt ampere meter volt ampere meter measures voltage of 070v or 0500v with 100mv resolution and current consumption 010a or more with 10ma resolution.
This is an lc meter designed by vk3bhr and presented here another project mostly from my junkbox i just needed the 16f628 and 100mh inductor from digikey. Oct 09, 2010 pic18f usb lc meter inductance and capacitance meter using microchips pic18f2550 connected to usb using hid class plugnplay. Special edition accurate lc meter is designed for professionals that require unprecedented measurement accuracy and offers great value at low cost. Pic software lets have a look of the different menu choices of this lcmeter. How to make a inductance meter using arduino soldering mind. Software functions are presented inside the dashed area. It is based on an alternative project named very accurate lc meter based on pic16f84a ic. As additional option we tested 74ac2 and reached a very good maximum frequency of measurement, up to 60mhz without a highfrequency divider. Pmp does not provide pulser drive coupling gilbarco r1875904 gasboy s01098. Very accurate lc meter based on pic16f628a electronics diy. Diy precision lc meter with a pic micro project posted october 6 2014 15. So, ive reached a whole new level of understanding of the oscillator, but i still need help on a few things. Jun 27, 2011 like theirs, mine would measure the free running frequency of an lc oscillator, then successively apply a known capacitance then the unknown inductor or capacitor.
Usb voltmeter sends measured data to pc via standard usb connection displaying data on a computer monitor. May 25, 2017 this design is a simple lc meter that accurately measures the inductance and capacitance. Lc meter is now ready, just select the operating mode lx o cx, insert unknow component and write f2 the new frequency in the software. Electronics projects, pic16f628 lc meter circuit microchip projects, microcontroller projects, pic assembly example, pic16f628 projects, date 20190802 lc meter circuit made with 16f628 microcontroller can be used to measure the inductor and capacitor values. This project is an advanced lcr meter based on pic16f690 microcontroller. It uses an lm311 comparator with positive feedback to make a parallel lc oscillator with digital output. The precision pf capacitor is switched with help of a reed relay. Lc meter com pic 16f84a by rbj electronics youtube. Jun 18, 2012 the last two pictures shows lc meter in action. Mine are often dumped into a miscellaneous box with other various components which makes it even more difficult to identify later. Pic16f84 lcd display lc meter electronics projects circuits.
Well this is a very accurate lc meter based on pic 16f628a. The device is very sensitive when i put the test leads there is 35 pf reading on display, but it is eliminated with the calibrating button. I use microsoft office primarily at work and openoffice primarily at home. The positive displacement measuring instrument that provides sustained accuracy and repeatability providing accuracy you can depend on. If possible, use a variable regulated supply for the first try. The design specifically uses the pic16f628a microcontroller of microchip, which is.
It has an auto ranging system, which can measure 10nh to 100mh range of inductance and 0. The lc meter that uses the pic requires two things to be accurate. Pic18f usb lc meter inductance and capacitance meter using microchips pic18f2550 connected to usb using hid class plugnplay. Nonetheless, the price of openoffice is hard to beat and openoffice is open source software. This pic software combines frequency counter and frequency lock functions. Like theirs, mine would measure the free running frequency of an lc oscillator, then successively apply a known capacitance then the unknown inductor or capacitor. You gotta load the lc meter code into it before it will work. The most powerful and scaleable electronic register ever produced. Pic can handle only 25 ma, reed relay pulls in more. The goal of my hard work is to people get success in a single try. It uses a tank oscillator circuit combining a few external components and pics internal comparator module. Pic16f628 lc meter circuit electronics projects circuits. By adding couple of transistors and operation amplifier tl082, it is possible to lock the lc oscillator frequency. I designed a code for inductance meter using arduino programming software.
Lc meters circuit uses an auto ranging system so that way you do not need to spend time selecting ranges. Camway lcr meter lcd capacitance inductance resistance tester measuring meter selfdischarge pf nf. The revised software checks for the presence or absence of a 1k resistor from pin 11 of the pic to. I made a few small changes in the software and the hardware to make the device more intuitive.
Its only a matter of time before you seek for an lc meter. The meter is a perfect addition to any power supply, battery chargers and other. Measure the supply current while gradually increasing the voltage. Best lc meter guide, i read it, its very good, even though it uses lm311 instead of the lm399, but from my understanding from previous threads, the only difference is that the lm339 needs 1k ohms pull up resistor, which i added to his circuit. Double check the pic orientation, the diode and the 7805. It seems to oscillate readily over a wide range of l and c values.
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