For example, you can control 12 LEDs using 4 Arduino pins 4*(4-1) =12. LEDs are diodes, and in diodes, current flows in only one direction. So in Charlieplexing, we connect two LEDs in parallel with ...

I made this Arduino project that allows to turn ON and OFF LEDs using a cheap IR remote control as a preparation for the next big step: disassemble my girlfriend’s chinese LED lamp and replace its ...

He only ever lights up one LED at a time, but he scans through the 128 LED’s so fast that persistence of vision prevents you from noticing. To the human eye, it looks like multiple LED’s are ...

Here’s a project that integrates an RFID reader, a servo motor, an LCD, 3 LEDs, and a 2-pin piezo buzzer with Arduino. This setup can be used to create an access control system where the RFID reader ...

This Arduino lights dimmer project is based on Doug Hitchcock’s comment: “I need to have a lamp dimmer that can “cascade” from one lamp to the next (up to 4 lamps). Basically, when you close a switch, ...

Driving multiple LEDs with one microprocessor GPIO pin is a well-known technique. Here's a way to accomplish the task that's simpler than other methods.

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