2017-03-31 (F) Weekly Summary

A new forward array was modeled for the tagger. This looks more complex and should fit the aesthetic of the project better. Functionally, it adds more room for the forward components which should make it easier to assemble and trouble-shoot. An accessory riser was added to the top to ensure alignment with the rest of the tagger.

Rotating view of forward array

Aligning all the components on the pipe has been difficult and led to wonky looking taggers. It wasn't a problem since they were not game-ready anyway but it seemed logical to make good looking taggers. The models below go into the ends of the pipe and provide a spot for a straightedge to make sure everything lines up.

Model of pipe alignment tools

Describing how the tools should work was difficult so pictures were taken and instructions were written on how to use them. Also, I found black ABS pipe with the same dimensions as PVC. It was considerably more expensive and lighter but it won't need paint so scuffing won't show as the taggers get worn.

Marking the centers of ABS pipe

Infrared emitters and receivers were attached to the serial pins of some TTL 232 ↔ USB adapters. Colloquially known as an "FTDI adapter" or, "the thingy I program my Arduino Pro with." I got garbled output.

The emitter shines purple though a digital camera

When I noticed that the emitter would glow constantly I assumed it only went low while transmitting but I think this was due to the transmitter. A couple of resistors and a transistor (2N3904) were used to make a NOT gate, also called an inverter. After that, the emitter would only glow when it was transmitting.

NOT gate controlling an infrared LED

A NOT gate was also constructed for the receiver and all the combinations were tried. Despite everything, no data could be reliably transmitted and garbled data was the best that could be received.

Garbled data


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