It has an auto ranging system, which can measure 10nh to 100mh range of inductance and 0. 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. Youritronics blog archive lc meter based on pic16f84a. The pic is being operated by a 4mhz crystal while the lc oscillator based around ic2 is the heart of the construction. Here the hardware and the software have been accomplished for a single and vital parameter i. We are honored to have spent some time on the road getting to know career fuelers, drivers, and ground support agents who have. To raise the indicated capacitance, join the links marked 4 on the diagram below. The original idea seems to have come from bill carver.
Very accurate lc meter based on pic16f628a circuit. If possible, use a variable regulated supply for the first try. Lc meter accessories include air eliminators, strainers, valves, and a choice of mechanical or electronic registers and printers for presetting, totalizing deliveries, and printing tickets. Very accurate lc meter based on pic16f628a pic microcontroller. The project utilizes a pic16f84a microcontroller to produce one of the most accurate and simplest lc inductancecapacitance meter which allows direct measurements of small inductance starting from 10nh to nh, 1uh to uh, 1mh to 100mh, and 0. Lc meter using a microchip pic 16f628a hacked gadgets. Apr 03, 2012 lc meter pic16f628 measurement of capacitance and inductance. Another project mostly from my junkbox i just needed the 16f628 and 100mh inductor from digikey. Here is another piece of laboratory equipment lc meter. Lc meter pic 16f84a and lm311 electronic components.
The weeder frequency counter pic 16f84 port by peter cousens this is a port by peter cousens to the pic 16f84 of the 50mhz frequency counter kit originally available from weeder technologies. This design is little different from other designs found on the internet. Since it uses a base pic that is easily programmable, and provides a usefull bit of bench test equipment at very low cost, it makes an ideal pic. Lc meter s circuit uses an auto ranging system so that way you. The lc meter is actually an lc oscillator based around the familiar comparator circuit lm 311. The oscillator design originally came from the aade lc meter web page. A pretty good lc meter based on the avr microcontroller cappels. Very accurate lc meter base free download as pdf file. May 20, 2012 voltmeter and ammeter can be easily made using pic microcontroller having adc analog to digital converter. 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.
So i decided to write this article on how to build an lc meter using an atmega328p chip and arduino. The circuit is built around a pic 16f84a microcontroler, or its replacement 16f628a. Lc meter based on pic16f84a circuit wiring diagrams. This lc meter allows to measure incredibly small inductances starting from 10 nh to nh, 1 uh to uh, 1 mh to 100 mh and capacitance from 0. This air eliminator is ideal for eliminating air from refined fuels applications where product is metered into storage from a truckmounted pump.
Liquid controls m and ma series truck meters provide the industrys most timeproven and respected records of superior value and performance. Easy to operate, easy to see, and configurable to your industry or application. An even better lc meter based on the avr attiny861 cappels. Yet another lc meter using pic16f628a embedded lab. Accurate lc meter based on pic16f628a using pic microcontroller ttpsu. For commercial use or manufacture please contact author.
A prescale chip from neccel may be added with divide by 256 counters to achieve 3. 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. I suggest to use pic with low pin numbers and multiplexed 7 segment display if you wish to use. May 02, 2020 as works the lc meter with pic 16f84 or 16f628. Pic16f877a is enough if you do this project only for testing purposes. Im not au fait with pic wizardry but i couldnt resists trying this as im desperate for an accurate lc meter. This lc meter allows to measure incredibly small inductances starting from 10nh to nh, 1uh to uh, 1mh to 100mh and capacitance from 0. Very accurate lc meter based on pic16f628a using pic. Very accurate lc meter based on pic16f84a ic radiolocman. It uses pic microcontroller 16f628a, and because i recently acquired a pic programmer, i decided to test it with. You gotta load the lc meter code into it before it will work. The main components included with the pic16f870 microcontroller are the oscillator lm311 and a standard 16 characters by 2 lines lcd display. Here is another lc meter project which is based on pic16f628a microcontroller. 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.
The precision pf capacitor is switched with help of a reed relay. Posted thursday, january 26, 2012 the project illustrates a measuring tool based on pic16f870 microcontroller that would calculate the inductance and capacitance. Very accurate lc meter based on pic16f628a circuit wiring. Pic16f84a microcontroller based lc meter posted tuesday, february 07, 2012 the project utilizes a pic16f84a microcontroller to produce one of the most accurate and simplest lc inductancecapacitance meter which allows direct measurements of small inductance starting from 10nh to nh, 1uh to uh, 1mh to 100mh, and 0. Mar 11, 20 i came to your lc meter a pic 16f84a and lm311 electronic components little knowledge page and noticed you could have a lot more traffic.
R1 p1 q1 bc179 22k 1 6 2 7 3 8 4 9 5 r2 47k osc2clkout pic 16f84 pic, 9 5 r2 47k osc2clkout pic 16f84 pic 16f84a r4 1 c1 4u7 5 12 volt dc x1, revision 2 a4 date. More details on the eeprom memory can be found in section 3. Feb2004 the meter measures l 1uh 10h c 1pf 6500uf f 0. May 25, 2017 this design is a simple lc meter that accurately measures the inductance and capacitance. The project of the oscillator came from the page of lc meter of aade it use the comparator lm311 with positive feedback.
Accurate lc inductance capacitance meter circuitvalley. Pic16f84a ds35007bpage 4 2001 microchip technology inc. I test my diyoutrunners, if i have the same turncount inductivity on each phase. The firmware is controlled from pc and is extended with further useful functions. We will use the well known parallel resonance formula see formula 1. To prevent stray inductancecapacitance and to ensure making the measurement more automatic, two relays have been added. It seems to oscillate readily over a wide range of l and c values.
No self respecting electronics experimenter these days should be without an lc inductancecapacitance measuring meter. I suppose i could have wound that myself but how to measure it without a meter. This design is a simple lc meter that accurately measures the inductance and capacitance. This project does not use a pic micro it needs a 74hc244 and some standard transistors. About author contact us pic projects privacy policy project list project search. This project is a simple lc meter based on pic16f682a mcu. One according to jumper connects the calibration capacitor ccal, the frequency now will be of 394khz. Hi, there is lcf meter project using pic will published in epe mag. 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. An lc meter project provides a capstone experience. L is the shock of 82 h and c it is the capacitor of pf. No relays are used to switch between inductance and capacitance measurement modes. This is accurate home made lc inductancecapacitance meter built with very common components which are very easy to find all around.
Measure the supply current while gradually increasing the voltage. This type of meter, especially l meter is hard to find in cheap commercial multimeters. Pic16f84a microcontroller based lc meter eeweb community. I bought the assembled version of the lc200a i know thats not exactly the same, but i think its related, and i found that it works fine. Pic16f84a is like a small computer that can execute hex. The pic16f627a628a648a are 18pin flash based members of the versatile pic16f627a628a648a family of lowcost, highperformance, cmos, fullystatic, 8bit microcontrollers. I am familiar with the earlier pic based high accuracy lc meter projects.
A potential divider is arranged using a resistor and a capacitor inductor such that an input ac voltage across the divider results in an output voltage across the capacitor inductor. The frequency comes out at pin 7 and then enters the pic at pin 11. 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. The oscillation frequency is the resonant frequency of the parallel lc combination. Oct 14, 2015 the lc meter circuit is based on the basic principle of measuring capacitance inductance using the relation between capacitance inductance and voltage. You only need to start with one precision component, either the reference capacitor or the reference inductor, and using this meter, you can select or adjust the other precision component.
The single head bulk plant air eliminator with optical sensor is the latest innovation in the fourdecade long evolution of liquid controls air eliminators. A parallel port pic programmer based on an589 with an icsp connector that you can use to program virtually any pic micro since they all use the same icsp connections. The precision pf capacitor is switched with help of a. Double check the pic orientation, the diode and the 7805. The pic16f627a628a648a have enhanced core features, an eightlevel deep stack, and. Lc meter pic16f628 measurement of capacitance and inductance. Another neat function is the zero out switch that will reset the initial inductance capacitance, making sure that the final readings of the lc meter are as accurate as possible. Sep 17, 2011 this lc meter was built using a microchip pic 16f628a. Liquid controls lc mseries rotary motion positive displacement pd meters for custody transfer applications requiring weights and measures approved. The lc meter circuit is based on the basic principle of measuring capacitance inductance using the relation between capacitance inductance and voltage. Posted on 110120 110320 admin posted in capacitance, inductance, lcd displays, microchip, pic. This auto ranging pic16f84a frequency counter counts up to 3540mhz and has two separate input bnc connectors. Lc meter s circuit uses an auto ranging system so that way you do not need to spend time selecting ranges manually.
Lc meters circuit uses an auto ranging system so that way you do not need to spend time selecting ranges manually. Iop type buffer type description osc1clkin 16 16 18 i stcmos3 oscillator crystal inputexternal clock source input. The design specifically uses the pic16f628a microcontroller of microchip, which is. The range of this lc meter is extremely good at measuring very low value of capacitance and inductance. To lower the indicated capacitance, join the links marked 3 on the diagram below. As additional option we tested 74ac2 and reached a very good maximum frequency of measurement, up to 60mhz without a highfrequency divider. 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. Lc meter using a microchip pic 16f628a hacked gadgets diy. 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. Very accurate lc meter based on pic16f84a ic microcontrollers mcu. I have found that the key to running a website is making sure the visitors you are getting are interested in your subject matter. Diy lc meter projects are very popular among hobbyists and students. Very accurate lc meter based on pic16f84a ic 10302007 this lc meter allows to measure incredibly small inductances starting from 10 nh to nh, 1 uh to uh, 1 mh to 100 mh and capacitance from 0.
Calculates and displays l and c from oscillation frequency using reference components. Pdf pic microcontroller offline projects list 800 projects trieu. The circuit was is the same comparitor based oscillator that is the mainstay of many if not most of the microcontroller based lc meter projects on the web. Lc meter based on pic16f84a this is diagram about lc meter based on pic16f84a you can learn online circuit wiring diagrams. Pic16f84a ic 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. Very accurate lc meter based on pic16f84a ic 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. Additional information on device memory may be found in the pic midrange reference manual, ds33023. It is based on an alternative project named very accurate lc meter based on pic16f84a ic. Voltmeter and ammeter can be easily made using pic microcontroller having adc analog to digital converter.
Mine are often dumped into a miscellaneous box with other various components which makes it even more difficult to identify later. The most powerful and scaleable electronic register ever produced. This lc meter was built using a microchip pic 16f628a. I am using pic16f877a and the result is displayed on an lcd display. It uses a tank oscillator circuit combining a few external components and pics internal comparator module.
Based on the lc meter brazil version hardware and software. Lc meter com pic 16f84a by rbj electronics youtube. The l and c values are computed from the resonant frequency of the lc tank circuit. The 64 bytes of data eeprom memory have the address range 0h3fh. Pic16f84 based lc meter inductance capacitor free 30. Well this is a very accurate lc meter based on pic 16f628a. Having inspired from surprisingly accurate lc meter. It uses an lm311 comparator with positive feedback to make a parallel lc oscillator with digital output. Hopefully, it follows the well known formula for resonant frequency. Special edition lc meter kit includes top notch high precision components that are only found in premium quality kits. Oct 16, 2010 there are quite a few good articles on how to build lc meters using pic mcus like the ones here.
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