Diodes

LED

LED is a light emitting diode. It only allows 1 direction of current, and it lights in that direction. The current must be limited by other components in order to not damage the semiconductor (which makes the light). Newer LED's in Snap Circuits have internal resistors inside, but the older ones don't have resistors.

Diode

The diode (D3) conducts or turns on when the voltage at the anode is 0.7V or greater. It will only allow 1 direction of a current. The current must be limited by other components in order to not damage this part and/or make a short circuit.

D1 (Red LED)
Debut	Light Emitting Diode
Class	D
Voltage limit	5 volts continuous, higher for short periods, has 33 ohm internal resistor

D2 (Green LED)
Debut	Batteries in Series
Class	D
Voltage limit	5 volts continuous, higher for short periods, has 33 ohm internal resistor

D3 (Diode)
Debut	Playback & Record
Class	D
Voltage limit	Current must be limited by other components

D4 (White LED)
Debut	Night Rover
Class	D
Voltage limit	9 volts continuous, higher for short periods, has 150 ohm internal resistor

D5 (Yellow LED)
Debut	Crank Charger
Class	D
Voltage limit	6 volts continuous, higher for short periods, has 100 ohm internal resistor

D6 (White LED)
Debut	White Light
Class	D
Voltage limit

D7 (7-segement LED Display)
Debut	Mega Circuit
Class	D
Voltage limit

D8 (Color LED)
Debut	Color Light
Class	D
Voltage limit

D9 (Blue LED)
Debut	5 Lights And A Melody
Class	D
Voltage limit

D10 (Red/Yellow bicolor LED)
Debut	Lights
Class	D
Voltage limit

D11 (Blinking Red LED)
Debut	Unknown
Class	D
Voltage limit

D12 (Color2 LED)
Debut	Unknown
Class	D
Voltage limit