WAAPA Lighting Buzz Box Project for First Year Lighting students is a practical example of a DC circuit that consists of a 9V battery, a buzzer, an LED, a switch and a set of test contacts that are housed in a small Jiffy box, that allows a student to test the lamp in a theatre light when rigging. The test contact spacing is suitable for the active and neutral pins of an Australian three pin plug, or the lamp pins.
The buzzer has a resistance of 550 ohms which limits the LED current to 12 mA. Using the Electrodroid battery calculator, the estimated battery life is 610 hours.
| Item | Quantity | Supplier/Item Code | Cost | Description | Image |
|---|---|---|---|---|---|
| Jiffy Box | 1 | Altronics / H0205 | $2.50 | Dimensions 82L x 54W x 30Hmm |  |
| Belt Clip | 1 | Altronics / H0349 | $1.20 | Handy black plastic belt clip. Suits black cases H 0343, H 0346. Can be used for the grey cases; H 0342 and H 0345. |  |
| 9V Battery | 1 | Altronics / S4830 | $3.95 |  |
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| Battery Snaps | 1 | Altronics / P0455 | $0.50 | Battery snap clip to suit 9V batteries. These can also be used to connect to some of our battery holders which include an integral battery snap. Head: 29mm Lead: 148mm |  |
| Piezo Buzzer 1 | 1 | Altronics / S6100 | $3.75 | SPL Output: 75dB @ 20cm Frequency: 400Hz ± 100Hz Supply Voltage: 9 - 15V DC Current: 25mA @ 12V DC Flyleads: 120mm |  |
| Piezo Buzzer 2 | 1 | Altronics / S6109 | $3.10 | Panel mount piezo buzzer. 30mm between mounting hole centres. 80mm lead. SPL output: 90dB @ 30cm Supply voltage: 1.5 - 24V dc Current: 10mA @ 12V dc Frequency: 5200Hz ± 500Hz Dimensions (mm): 22Ø x 12H |  |
| Momentary Switch | 1 | Altronics / S0966 | $6.50 | Contact rating: 125mA @ 125V AC Contact res.: 50mΩ max. Insulation res.: 1GΩ min @ 500V DC LED: Red 2V DC Dialectric strength: 1000V AC 1 minute Electrical life: 500,000 cycles SPST Momentary with Black pushbutton actuator and Red LED. |  |
| LED 1 ( various ) | 1 | eBay | |||
| LED 2 ( various ) | 1 | eBay | |||
| LED 3 ( various ) | 1 | eBay | |||
| LED 4 ( various ) | 1 | ||||
| M3 x 10mm Pan Pozi Nickel Bolt | 2 | Altronics / H3120A | $2.25 pk 25 | ||
| M3 Flat Washer | 2 | Altronics / H3180 | $2.10 pk 25 | ||
| M3 Hex Nut | 2 | Altronics / H3175 | $2.75 pk 25 | ||
| 3.2mm Solderlugs | 2 | Altronics / H1503 | $3.05 pk 10 | ||