The 556 Dual Monolithic timing circuit is an highly stable controllers capable of producing accurate time delays or
oscillation. The 556 is a dual 555. Timing is provided by an external resistor and capacitor for each timing function. The two timers operate independently of each other, sharing only VCC
and ground. The circuits may be triggered and reset...
hs0038 IR sensor tuned to 38KHz, perfect for receiving commands from a TV remote control. Runs at 5V (although it seems to be OK down to 3.3V)To use, connect pin 3 (all the way to the right) to 5V power, pin 2 (middle) to ground and listen on pin 1. It doesn’t do any decoding of the signal, just passes the ‘raw data’ along.
CD4077BE is a quad CMOS Exclusive-NOR Gate for use with logical comparators, adders/subtractors, parity generators and checkers. The CD4077B provide the system designer with a means for direct implementation of the Exclusive-OR and Exclusive-NOR functions, respectively.