The breadboard comes with a power supply, you can set one side for 5VDC, and the other for 3.3VDC. It has a push switch to turn the power on or off. Component listing: 1 X Power Supply Module 1 X 830 tie-points Breadboard 1 X 65 Jumper Wire 140 X Solderless Jumper Wire 20 X Female-to-male Dupont Wire 2 X Pin header (40pin) 1 X Precision Potentiometer 2 X Photoresistor 1 X Thermistor 5 X Diode Rectifier (1N4007) 5 X NPN Transistor (PN2222) 1 X IC 4N35 1 X IC 74HC595 10 X Button (small) 10 X 22pf Ceramic Capacitor 10 X 104 Ceramic Capacitor 5 X Electrolytic Capacitor (10UF 50V) 5 X Electrolytic Capacitor (100UF 50V) 10 X White LED 10 X Yellow LED 10 X Blue LED 10 X Green LED 10 X Red LED 1 X RGB LED 10 X Resistor (10R) 10 X Resistor (100R) 10 X Resistor (220R) 10 X Resistor (330R) 10 X Resistor (1K) 10 X Resistor (2K) 10 X Resistor (5K1) 10 X Resistor (10K) 10 X Resistor (100K) 10 X Resistor (1M)
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