Wiring problems and mistakes are all too common, and if left uncorrected have the potential to cause short circuits ... there are also three-way dimmers, CFL and LED dimmer switches.

[fahadshihab], a young tinkerer, shared his circuit design for a simple remote control using 555 timers ... this with an oscillator, an IR LED, or a laser for long-range control.

[Danko]’s minimal circuit is about as small as possible for the DIP version of the venerable 555 chip. The BOM is stripped to the bone: just the chip, three resistors, a capacitor, and an LED.