This LC Meter allows to measure incredibly small inductances making it perfect tool for making all types of RF coils and inductors. The circuit includes an auto ranging as well as reset switch and produces very accurate and stable readings. 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 a very useful bench test equipment for testing and finding out the frequency of various devices with unknown frequency such as oscillators, radio receivers, transmitters, function generators, crystals, etc. The output waveforms can be both amplitude and frequency modulated. It can be connected to any type of stereo audio source such as iPod, Computer, Laptop, CD Player, Walkman, Television, Satellite Receiver, Tape Deck or other stereo system to transmit stereo sound with excellent clarity throughout your home, office, yard or camp ground.
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Help me to develope andy-progetti. Preface Fig. I have always been fascinated by LCDs. Their capability to make numbers, letters and drawings on a glass plate is something magic. Thanks to this project I learnt a bit more about them and I discovered the tricks of the wizardry. Despite this, and even if the LCD displays have become obsolete, I still think they are the result of an amazing technology. For practical reasons, I decided to split the project in two different sections, and then, in two different boards: one for the LCD display and another one for the ICL IC.
Two core components, two sections, two boards Fig. The scheme on the left shows the placement of the two boards and how to connect each other by a 26pin connector. The low power dissipation of the two core components make the project suitable to build a portable device.
For that reason you can take the advantage of the free space under the LCD display board to put a 9V battery. The LCD display section The purpose of this circuit it is to connect the display to the 26dip connector that puts in communication this section with the other one. Pay attention only to solder the 26dip connector faced on the bottom layer of the board.
If you notice, in the LCD display shown in figure 1 I removed the reflective surface for a future purpose. For the same reason I designed the PCB leaving the display area empty of tracks. As defined in the data sheet, the AD is a two-terminal IC temperature transducer. In the schematic it is drawn as a current generator, which it actually is.
ICL7106CPL Intersil, ICL7106CPL Datasheet - Page 14
ICL7106CPL Intersil, ICL7106CPL Datasheet