Friwo LED drivers will light up your LEDs as much as you just want

Power supplies for LED lighting (so called drivers) are available from many producers, in a various qualitative level. Why to decide just for the LT series from German company Friwo? Here are few reasons: • precise design, safe operation and a long lifetime • voltage and current regulation in one device • high efficiency and a possibility of dimming in a range of 0-100% directly via a CTRL pin • modules are ...

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The MAX7219 and MAX7221 Led drivers

These two integrated circuits from Maxim are for driving either 64 individual Led's, or up to 8 digits of 7-segment displays. The drivers implement a SPI compatible slave interface that can be controlled from the Arduino using only 3 of the digital output pins. An extensive datasheet for the IC's is available from the Maxim homepage. Since both chips are very similar, I will use the term MAX72XX for both th ...

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