In the next step we use the frequency generated by lm311 ic and pass it on to pic 16f628as pin 17. The project came from a famous lc meter with a few modifications such as changing the original firmware and adding few electronic goodies for more compact shape. As i explained earlier the frequency of the cap osc can be very high at switch on. The most powerful and scaleable electronic register ever produced. In the next step we use the frequency generated by lm311 ic and pass it on to pic 16f628a s pin 17. This has internal comparator, which means the lm311 is no longer needed. The goal of my hard work is to people get success in a.
Basically lc meter is a kind of frequency meter, there is an lc tank oscillator that oscillates with measured l or c and result is being calculated. Lc meter circuit made with 16f628 microcontroller can be used to measure the inductor and capacitor values. Measure the supply current while gradually increasing the voltage. 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. By taking care to conduct your tests in a precise and consistent manner, you will accomplish several things.
I suppose i could have wound that myself but how to measure it without a meter. This is an lc meter designed by vk3bhr and presented here. High quality manufacturing and simplicity in design make liquid controls meters less costly and more reliable to operate than other meters. Replacement parts and accessories for liquid controls positive displacement meters. Apr 30, 2014 here is the description of a simple capacitance and inductance meter, easy to build, based around a pic microcontroler. May 02, 2020 as works the lc meter with pic 16f84 or 16f628. Liquid controls m and ma series truck meters provide the industrys most timeproven and respected records of superior value and performance. Jun 18, 2012 the last two pictures shows lc meter in action. Posted tuesday, march, 2012 the project came from a famous lc meter with a few modifications such as changing the original firmware and adding few electronic goodies for more compact shape. 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.
Yet another lc meter using pic16f628a embedded lab. The circuit is built around a pic 16f84a microcontroler, or its replacement 16f628a. Easy to operate, easy to see, and configurable to your industry or application. In the first of them, there is 1nf1% capacitor and in the second 22uh10% inductor. Having inspired from surprisingly accurate lc meter. Lcmeter with pic microcontroller very fast,very good accuracy, technical informations.
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. I have not changed the lc oscillator much from others projects, since this is an excellent oscillator. We are honored to have spent some time on the road getting to know career fuelers, drivers, and ground support agents who have. Many multimeters can measure capacitance c in piconano. 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. Wide viscosity range lc meters can accurately meter products from less than 30 ssu less than 1 centipoise to 1,500,000 ssu 325,000 centipoise. 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. Following the above link you will find the original schematic, pcb, source and hex files for programing the microcontroller. The design specifically uses the pic16f628a microcontroller of microchip, which is. I have found that the key to running a website is making sure the visitors you are getting are interested in your subject matter. Special edition accurate lc meter is designed for professionals that require unprecedented measurement accuracy and offers great value at low cost. To lower the indicated capacitance, join the links marked 3 on the diagram below.
The meter works great for measuring small capacitance values from. This project is a simple lc meter based on pic16f682a mcu. Very accurate lc meter based on pic16f628a circuit wiring. It uses a tank oscillator circuit combining a few external components and pics internal comparator module. Here is another lc meter project which is based on pic16f628a microcontroller. All accurate lc meter kits already come with microcontroller that is already programmed and ready to be used. Lc meter using a microchip pic 16f628a hacked gadgets diy. 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. L is the shock of 82 h and c it is the capacitor of pf. This design is little different from other designs found on the internet. For instance, both can store energy even though it is stored as a magnetic field by the inductor whereas a capacitor stores electric charge. To raise the indicated capacitance, join the links marked 4 on the diagram below. There are quite a few picbased esr meters out on the web that could be added to a picbased lc meter the circuit cellar project looks good, but ive not downloaded the details i built one based on this idea, it works very well.
But not for capacitors with inductive design electrolytic, polyester, etc. This type of meter, especially l meter is hard to find in cheap commercial multimeters. When the indicated value is close enough to the standard, remove the link. 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. Lc meter using a microchip pic 16f628a hacked gadgets. This lc meter was built using a microchip pic 16f628a. Using pic16f628a for a modified lc meter eeweb community. It seems to oscillate readily over a wide range of l and c values.
Mine are often dumped into a miscellaneous box with other various components which makes it even more difficult to identify later. Pic16f628 lc meter circuit electronics projects circuits. This high freq is connected from the 4011 pin10 to the pic pin 12 via a 10k resistor. It uses pic microcontroller 16f628a, and because i recently acquired a pic programmer, i decided to test it with this project. Another thing they have in common is that it is hard to know their exact value. The original description has been done by phil rice vk3bhr on his pages.
Hi, there is lcf meter project using pic will published in epe mag. 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. The project of the oscillator came from the page of lc meter of aade it use the comparator lm311 with positive feedback. The lc meter is actually an lc oscillator based around the familiar comparator circuit lm 311. Basic qmeter circuit the basic operation based on the wellknown characteristics of series resonant circuits.
Hopefully, it follows the well known formula for resonant frequency. It has an auto ranging system, which can measure 10nh to 100mh range of inductance and 0. Inductors and capacitors are two types of components that have several things in common, yet they are very different. Before pic16f628a microcontroller can be used it has to be programmed with a hex code which has to be sent from the computer. Lcmeter will work equally good with or without your knowledge about the theory. Ensure that the meter will pass inspection by local weights and measures officials. Well this is a very accurate lc meter based on pic 16f628a. Mar 09, 2012 choosing a backup generator plus 3 legal house connection options transfer switch and more duration. Oct 14, 2015 an lc meter circuit is used to measure value of a reactive element like a capacitor or an inductor. An lc meter circuit is used to measure value of a reactive element like a capacitor or an inductor. A285911 200 gpm 757 lpm 350 psi 24 bar for use with lpg systems. Diy lc meter projects are very popular among hobbyists and students.
Im not au fait with pic wizardry but i couldnt resists trying this as im desperate for an accurate lc meter. 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. How to calibrate a meter accurate calibration of fuel dispensing meters is an important responsibility of a service station equipment technician. Lc meter pic 16f84a and lm311 electronic components. Here is another piece of laboratory equipment lc meter. 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. The inductance vvalue in uh becomes heed of the hour. The oscillator design originally came from the aade lc meter web page.
Very accurate lc meter based on pic16f628a circuit. Very accurate lc meter based on pic16f628a pic microcontroller. Jun 28, 2016 it uses pic microcontroller 16f628a, and because i recently acquired a pic programmer, i decided to test it with this project. Many times we have to wind coils to suit our needs of hf tuned circuits, filters etc. This design is a simple lc meter that accurately measures the inductance and capacitance. Inductometro capacimetro digital casero con pic16f84a 16f628a lc. The precision is very good and even better than many commercial lcmeter. Another project mostly from my junkbox i just needed the 16f628 and 100mh inductor from digikey. In the middle of august i got on ebay and bought a lc meter model lc100a, which is actually just a pc board, an lcd display, 2 very short clip leads with alligator clips, and a short usb to mini usb cable to supply power to it. This article describes the design and functioning of a simple circuit using a 555 timer and a microcontroller. May 25, 2017 this design is a simple lc meter that accurately measures the inductance and capacitance. Despite its modest cost, it offers automatic direct digital measurement over a wide range for both capacitance c and inductance l with 4digit resolution. This article describes the design and functioning of a simple circuit using a.
Very accurate lc meter based on pic16f628a using pic. 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. Complete operators manual and reference meter test report included. Meters conform to nist and international weights and measures accuracy requirements. We will use the well known parallel resonance formula see formula 1. The firmware does not include critical firmware modifications and all calculations are performed just like in the original firmware. Lcs combination of low pressure drop with minimum seal or slippage area offers better accuracy over a wide range of flow than other commercially produced positive displacement meters. The l and c values are computed from the resonant frequency of the lc tank circuit. Choosing a backup generator plus 3 legal house connection options transfer switch and more duration. I test my diyoutrunners, if i have the same turncount inductivity on each phase. Lc meter pic16f628 measurement of capacitance and inductance. Coil v l vc v x l xc r vc vl i ir v ixl at resonance.
In the next step we use the frequency generated by. It uses an lm311 comparator with positive feedback to make a parallel lc oscillator with digital output. Following the above link you will find the original schematic, pcb, source and hex files for programing the microcontroller and detailed description. This circuit is drawn here as a representation only. Wide viscosity rangelc meters can accurately meter products from less than 30 ssu less than 1 centipoise to 1,500,000 ssu 325,000 centipoise. Wide temperature rangeproducts can be metered accurately from 40 f 40 c to 160 f 71c. You gotta load the lc meter code into it before it will work. This project is based on the surprisingly accurate lc meter article that appeared in the april 2004 issue of the wia.
The goal of my hard work is to people get success in a single try. The most challenging part of the project was to program the entire floating point math in 2k code memory of 16f628a. Lc meter hombrew based on phil rice vk3bhr design digital lc meter is a very useful test equipment for most hamswhether they hombrew or service their equipments. Feb2004 the meter measures l 1uh 10h c 1pf 6500uf f 0. 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. I have found that the key to running a website is making sure the visitors you are getting are. If possible, use a variable regulated supply for the first try. Is there is big diffrence between 16f628 and 16f628a. Sep 17, 2011 this lc meter was built using a microchip pic 16f628a. Apr 03, 2012 lc meter pic16f628 measurement of capacitance and inductance. 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. Q meter qmeter is an instrument designed to measure the q factor of a coil and for measuring inductance, capacitance, and resistance at rf. Hi al, i have built the lcf meter, on the bench, used the last 16f628a program in a pic.
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