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Resistor Based Level Shifter (Resistor Divider)

Easily the cheapest and easiest way to shift voltage levels is with a resistor divider circuit. It literally takes 2 resistors. The voltage is ‘divided’ between the 2 resistors. In the example circuit above the values were chosen to be

Posted in Arduino, AVR, Electronics, Raspberry Pi Tagged with: , , , , , , , , , , , , , , , , ,

Large LED Matrix Display – Part 1

I’ve wanted a digital marquee for a long time. The kind you see at some gas stations or grocery stores that say simple messages like “Have a nice day!”. They tend to be pretty expensive for something pretty small. I

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