.:madworm:.'s photos
AVR ISP pogo-pin programming adapter
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Using the jig to assemble the pogo-pin adapter
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Trying to get good pin alignment
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Assembly jig
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The first set of holes were of no use. After drilling I noticed that the block wasn't square enough. Depth wasn't uniform either. The 2nd set of holes did the job. It still wasn't a piece of cake, but it worked.
Wooden assembly jig
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Assembly jig
Wooden assembly jig
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Pogo-pin adapter with assembly jig
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Set of holes
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Pogo-pin adapter PCB
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Some sort of flower
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Some sort of flower
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Piezo buzzer - cleaned
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I used a bit of abrasive dish-cleaner to remove most of the oxidization.
The smoke detector didn't survive dismantling. I need a new one.
Optical smoke sensor
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With no small particles in the air, the IR beam goes straight into the wall of the housing. The wall is black and absorbs a great deal of the radiation. The little fins might be angled in such a way that the reflected radiation bounces around many times, which further attenuates it. Ideally nothing ever hits the sensor. The main purpose of this construction is to allow smoke-carrying air penetrate the walls, but keep ambient light out.
When tiny smoke particles are present in the center of the sensor, they scatter some of the IR light towards the sensor. You hear a very load beep.
Optical smoke sensor
Optical smoke sensor
Smoke detector - PCB
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