Thursday, 3 January 2013

Home | Map | Projects | Construction | Soldering | Study | Components | 555 | Symbols | FAQ | Links Electronics Club Flashing LED Project LED stands for Light Emitting Diode A kit for this project is available from RSH Electronics. Download PDF version of this page This project is designed as an introduction to soldering, identifying common components, using the resistor colour code and placing components correctly on stripboard. The LED flashes at about 3Hz (3 flashes per second). This project uses a 555 astable circuit. Parts Required * resistors: 470, 1k, 220k * capacitor: 1µF 16V radial * red LED (or orange, yellow or green if you prefer!) * 555 timer IC * 8-pin IC holder (a 'DIL socket') for the 555 IC * battery clip for 9V PP3 * stripboard: 6 rows × 21 holes Instructions 1. Solder the 8-pin IC holder in the correct place on the stripboard. 2. Break the 4 tracks under the IC holder with a track cutter tool. You can allow extra holes if your piece of stripboard is large enough. Stripboard with IC holder 3. Use the resistor colour code to identify the resistors which are marked with coloured bands to show their value. 4. Insert and solder the resistors in the correct position, they can be put in either way round, but you must line them up correctly with the IC holder. 5. Identify the other parts, then solder them in the correct position and the right way round. To help you identify the parts please see our page on soldering. Stripboard layout for flashing LED 6. Solder the 2 wire links in place around the IC holder, it is easier to use plastic-coated single-core wire. (The flexibility of stranded wire is not needed for connections like this and the strands can be difficult to push through the small hole). 7. Finally insert the 555 timer IC and connect a battery! For a circuit diagram of the 555 astable circuit used in this project please see the Stripboard page. Click here for RSH Electronics A kit for this project is available from RSH Electronics. If you are new to electronics buying a kit is a good way to be sure you have the correct parts for the project. Return to Projects page * Electronics Club Home Page Soldering iron * Site Map * Example Projects * Construction of Projects * Soldering Guide * Study Electronics * Electronic Components * 555 Timer * Circuit Symbols * Frequently Asked Questions * Links to other Electronics sites This website uses StatCounter cookies to estimate the number of unique visitors. No personal information is stored in the cookies. If you would like further information or wish to refuse these cookies please visit the StatCounter website. © John Hewes 2013, The Electronics Club, www.kpsec.freeuk.com

Home | Map | Projects | Construction | Soldering | Study | Components | 555 | Symbols | FAQ | Links
Electronics Club

Flashing LED Project

LED stands for Light Emitting Diode
A kit for this project is available from RSH Electronics.
Download PDF version of this page
This project is designed as an introduction to soldering, identifying common components, using the resistor colour code and placing components correctly on stripboard. The LED flashes at about 3Hz (3 flashes per second). This project uses a 555 astable circuit.

Parts Required

  • resistors: 470, 1k, 220k
  • capacitor: 1µF 16V radial
  • red LED (or orange, yellow or green if you prefer!)
  • 555 timer IC
  • 8-pin IC holder (a 'DIL socket') for the 555 IC
  • battery clip for 9V PP3
  • stripboard: 6 rows × 21 holes

Instructions

  1. Solder the 8-pin IC holder in the correct place on the stripboard.
  2. Break the 4 tracks under the IC holder with a track cutter tool. You can allow extra holes if your piece of stripboard is large enough.
    Stripboard with IC holder
  3. Use the resistor colour code to identify the resistors which are marked with coloured bands to show their value.
  4. Insert and solder the resistors in the correct position, they can be put in either way round, but you must line them up correctly with the IC holder.
  5. Identify the other parts, then solder them in the correct position and the right way round. To help you identify the parts please see our page on soldering.
    Stripboard layout for flashing LED
  6. Solder the 2 wire links in place around the IC holder, it is easier to use plastic-coated single-core wire. (The flexibility of stranded wire is not needed for connections like this and the strands can be difficult to push through the small hole).
  7. Finally insert the 555 timer IC and connect a battery!
For a circuit diagram of the 555 astable circuit used in this project please see the Stripboard page.
Click here for RSH Electronics A kit for this project is available from RSH Electronics. If you are new to electronics buying a kit is a good way to be sure you have the correct parts for the project.
Return to Projects page
This website uses StatCounter cookies to estimate the number of unique visitors. No personal information is stored in the cookies. If you would like further information or wish to refuse these cookies please visit the StatCounter website. © John Hewes 2013, The Electronics Club, www.kpsec.freeuk.com

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