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Step 4Final assembly
The PCB was designed specifically for this case, so simply slid over the mounting posts. Because space was very tight, the switch assembly was soldered directly to the PCB and a piezo buzzer hot glued to a chip. If you want a louder piezo you'll have to add a driver as this is driven directly from the microcontroller. You really do need to glue or fix the piezo to something in oder to increase the volume.
The power supply lead was tied around the bottom mounting post as a strain relief. I've just pocked it out the mounting holes, but you can use a proper grommet if necessary.
That's about it really, the device is powered from a 9V plugpack and sits above my dvd player merrily changing patterns.
The power supply lead was tied around the bottom mounting post as a strain relief. I've just pocked it out the mounting holes, but you can use a proper grommet if necessary.
That's about it really, the device is powered from a 9V plugpack and sits above my dvd player merrily changing patterns.
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