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Step 8More wiring
Wiring up the schematic in the previous page was a little tricky... since it was all inside the clock.
I used crocodile clips whenever i was soldering the leads of the transistor. they can be pretty sensitive to heat, and the crocodile clip serves as a heat sink safety net for you.
I wrapped all the exposed joints with electrical tape and cut an extra slot around the rim of the clock so that the buzzer could go outside. If there is spare real estate inside your clock you can leave it inside, there wasn't in mine...)
If you hold the transistor with the flat face towards you, the leads from left to right are emitter, base and collector.
If you want to check that everything has worked before putting it together, be cafeful. Plugging and unplugging whilst the case is open is potentially lethal. don't touch anything inside if you plug in the clock.
I used crocodile clips whenever i was soldering the leads of the transistor. they can be pretty sensitive to heat, and the crocodile clip serves as a heat sink safety net for you.
I wrapped all the exposed joints with electrical tape and cut an extra slot around the rim of the clock so that the buzzer could go outside. If there is spare real estate inside your clock you can leave it inside, there wasn't in mine...)
If you hold the transistor with the flat face towards you, the leads from left to right are emitter, base and collector.
If you want to check that everything has worked before putting it together, be cafeful. Plugging and unplugging whilst the case is open is potentially lethal. don't touch anything inside if you plug in the clock.
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