Traffic Light
The faithful traffic light is something that has been around since the first cars after drivers had difficulty in deciding who had right of way at a junction. The modern traffic light found in the UK is often connected to an intelligent network of controllers and logic to try and keep traffic moving as efficiently as possible. While this project is far more trivial, you will learn how to build a traffic light that uses the correct colour sequence found on many UK traffic lights! This circuit is based around a 555 astable oscillator as a clock source, a 4017 IC as the counter stage, and a diode matrix for creating the light patterns.
Instructions / Documentation
Product specifics
- Component Count: 42
- Battery Powered?: Yes, 9V PP3
- Operating Voltage: 7V to 16V
- Operating Frequency: N/A
- Output Voltage: 9V, -9V, 5V, 3.3V
- Output Current: 100mA all rails except -9V
- Dimensions (PCB) : 59mm x 43mm
- Mounting Holes: Yes
- Prebuilt: No – Kit form
- Batteries Not Included
Included in this kit
Full Kit
- 1 x 16 DIP Socket
- 1 x 8 DIP Socket
- 1 x 4017
- 1 x 555
- 1 x 10K Resistor
- 1 x 22K Resistor
- 2 x 100nF Capacitors
- 1 x 100uF Capacitor
- 9 x 1N4148
- 1 x 4 Way Pin Socket
- 1 x PP3 Connector
- 1 x ControllerPCB
- 3 x 680R Resistors
- 1 x Red LED
- 1 x Yellow LED
- 1 x Green LED
- 1 x 4 Way Pin Header
- 1 x Light PCB
Pack of 3 lights
- 9 x 680R Resistors
- 3 x Red LED
- 3 x Yellow LED
- 3 x Green LED
- 3 x 4 Way Pin Header
- 3 x Light PCB
Applications
The Traffic Light is an ideal kit for scale models such as train sets, diorama, and table-top wargaming. The kit is also ideal for teaching students about the 4017 counter and how its multiple outputs can be combined to create specific patterns that repeat continuously. As the kit can be constructed in under an hour, the Traffic Light is ideal for training students on how to solder, and the LED nature of the kit can help inspire completion of the proejct.
Notes
Note that product specifics such as output frequency depend on the tolerance of the components. The numbers provided here are an approximation only. Also take note that the estimated delivery is not guaranteed (unless special delivery is chosen) and free delivery has a maximum waiting time of two weeks. Any product that is returned which is built using lead solder is ineligible for a refund.
All parts sold by MitchElectronics are compliant with RoHS and REACH directives which ensure that they can be used in commercial environments as well as complying with environmental laws. Watch the video below to learn more about RoHS compliance and why it may be important for your next DIY project!
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