Blog Archives

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 2 (Driver Board Fabrication)

More work done on the LED Display! This weekend I got the first of many (and by many I mean 160) LED driver boards. This board will eventually drive 8 of the 1280 LEDs on the final sign. Here are

Posted in Electronics Tagged with: , , , , , , , , , , , , , , ,

AVR 10-pin/6-pin Header Converter

I’ve been using a parallel port programmer (Printer Port) to program my AVRs since I started using them. I’ve had to keep a slow old computer around just to program my AVRs since most new computers don’t even have parallel

Posted in Electronics Tagged with: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , ,

Homemade PCB Fabrication

I’m going to put this guide up mostly for myself so I can repeat my successful PCB fabrication. I’ll try to update this with links to sites for each product and pictures of my going through the process the next

Posted in Electronics Tagged with: , , , , , , , , , , , , , , , , , , ,