Electronics
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How to Use a Multimeter
A multimeter is the most useful tool when dealing with electricity. A cheap $15 multimeter will go a long way and is likely all that you’ll need. In general, anything fancier/more expensive…
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Basics of Electricity
This is meant to be a basic introduction to electricity / electrical concepts for those who have limited or no electrical background. V=IR Where: V = Voltage (measured in volts V) I…
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How to Get Started with LED
Connect a LED with a battery and a resistor. The long leg of an LED is the positive, the anode. You could connect a LED directly to a battery without a resistor,…
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How to Build a Basic USB Powered Amplifier
Buy a LM386, this chip has been around for ever, is cheap, plentiful and the recommended supply voltage is 4-12VDC. With the notch on the chip facing you and pointing up, the…
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How to Get Started with Arduino
Buy the Arduino UNO (R3 at the time of this writing). This is the “most standard” version of the Arduino that I’ve come across. The Arduino IDE works perfectly via USB and…