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Adding self power down functionality to your devices

Power SupplyPower down feature is very handy on battery operated devices. For instance most of multimeters already have this feature allowing them to self turn off when there is no activity for some...

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12V solar charger using LM317

Solar Energy[Alex] decided to build a solar charger for his car battery. He had an 18V solar panel able to provide up to 83mA. You cannot connect panel directly to battery because charging voltage...

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Electronic parts voice look-up assistant

SoftwareAs electronic enthusiast you probably have pile of resistors, capacitors and other electronic components. Most of them are color coded and in order to use any of these you need to identify each...

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Hand written equation conversion to LaTex and MathML

SoftwareWriting formulas and equations for some publication or websites is time consuming task. Usually there is LaTex syntax used to enter formulas. But when formulas get more complex it gets really...

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Ground fills and polygons – how to do this right in eagle

PCB TechnologiesTake any professionally made PCB and you will find that in most cases areas between traces are filled with copper areas. In fact background fills can give benefit but also be harmful to...

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Right hand for electronics designers – pcb calculator

PCB TechnologiesDesigning a good PCB requires some knowledge and good calculator. First one can be obtained gradually by making tons of PCBs and learning from failures. Different thing is calculator....

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Building simple power supply from theory to working example

Power SupplyPower supply is essential part in every electronic device. The whole system relies on it. If power supply fails – device dies too and there is a chance that sensitive parts may be damaged....

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Intrinsically safe laptops

Computer HardwareComputer is number one tool in engineering, manufacturing and production. When you need some mobility - Laptop is best choice. We all know that computers are packed with electronics...

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What Are Airfield Obstruction Lights?

MiscATG airfield obstruction lights are specialty lights set up on runways and helipads at commercial airports as well as private airfields. These facilities are required by law to provide this...

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Simple dummy load for basic testing

Power SupplyI bet you face lots of problems in design process where you simply need to test power supply, or LED by providing/drawing constant current regardless to voltage change. Such device is...

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