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FUSE TESTER PROJECT FOR SUMMER SCHOOL

Modified: 18:04, 26 October 2013

This project was devised for summer school at Highcliffe School in 2001. All students were about to enter year 7 and completed the project within 5 hours.

The design is basically a 3mm sheet of acrylic measuring about 160x80mm bent into a shape to accomodate a PP3 battery and also act as a stand. The front can be shaped into any theme you want to follow. We used cartoon characters from the internet using Google.

Resources to help:

  • Shaping the acrylic
    A PowerPoint presentation guiding students through shaping the acrylic. (PowerPoint - 37K)
  • Fitting Components and Wiring Up
    A step by step guide to fitting the components to the acrylic and connecting them together. (PowerPoint - 96K)

Completed Projects in 5 hours!

Circuit diagram of fuse tester, couldn't be simpler really. I gave students the option of LED's, buzzers or both. The buzzer draws around 10mA and the LED's about 18mA which is low enough to test even a 50mA fuse!

COMPONENTS
Buzzer, 35-0245

Above is the buzzer used in the project. Rapid sell it but it's a bit expensive. You can use any buzzer that works from 6 to 12 volts. A cheaper alternative is shown below.

Buzzer, 35-0100
Below is the 20mm fuse holder used which has 1.5mm PCB connections and a 3mm fixing hole in the centre.
Fuse holder, 26-0165
BASIC STAND SHAPE

There are 3 bends that serve to form the stand and the holder for a PP3 9v battery. We used a strip heater and wooden formers to get accurate bends. It helps to bend slightly further than 90 degrees so the battery is gripped tighter.You can also drill a hole near the top centre and hang it on a wall.
Below is the drilling template for the fuseholder.

ACRYLIC TEMPLATE

Above is the standard piece of 3mm acrylic all students were given.

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