This page was generated from an open-source design by capnregex. You can find the original project here, and read the license here.

Breadboard Wee Blinky

A Breadboard version of Dale Wheat's Wee Blinky.

Wee Blinky on a Breadboard

Simple project to illustrate an application for a Resistor Capacitor charge discharge curve along with a switch mode application of transistors in an astable flipflop configuration.

Bill of materials

Components	Part	Part count
R1, R2	Resistor (resistance 1kΩ, power 0.25W)	2
R3, R4	Resistor (resistance 33kΩ, power 0.25W)	2
C1, C2	Electrolytic Capacitor (capacitance 10µF)	2
LED1, LED2	LED - 5mm (color Red (633nm), current 0.030A)	2
Q1, Q2	NPN-Transistor	2
V1	Power (voltage 4.5V)	1

Connected nets

All points in a row of the nets table are connected by wires.

Circuit node	Connected pins
Net 1	R1 lead 0 C1 + lead Q2 C lead
Net 2	R1 lead 1 LED1 cathode lead
Net 3	R2 lead 0 C2 + lead Q1 C lead
Net 4	R2 lead 1 LED2 cathode lead
Net 5	R3 lead 0 C1 - lead Q1 B lead
Net 6	R3 lead 1 R4 lead 1 LED1 anode lead LED2 anode lead V1 V+ lead
Net 7	R4 lead 0 C2 - lead Q2 B lead
Ground	Q1 E lead Q2 E lead GND

Detailed part info

Resistor (resistance 1kΩ, power 0.25W)

A generic resistor (0.25W)

Resistor (resistance 33kΩ, power 0.25W)

A generic resistor (0.25W)

Electrolytic Capacitor (capacitance 10µF)

A generic capacitor

LED - 5mm (color Red (633nm), current 0.030A)

A generic LED (~1.8V)

NPN-Transistor

A standard NPN-transistor

Pin descriptions

Pin	Description
E	Emitter
B	Base
C	Collector

Power (voltage 4.5V)

A generic power symbol