2017-05-31 (W) Pi0 Laser Tag PiTagErrUs

Two boards were made yesterday so components were prepared for assembly. Previously, when a single screw terminal was necessary, the scrap half of a double-terminal was cut away roughly and discarded. This left a jagged edge and destroyed one of the terminals. These were not expensive components but it was wasteful. A razor saw was used to cut some of the screw terminals in half to make singles.

Razor saw and screw terminals

Halved screw terminals

Two boards were assembled completely. After the past failures, it seemed prudent to assemble two boards immediately to check for errors and hope for one board without problems.

Two assembled boards

Both boards tested perfectly! All the inputs and outputs and transistor circuits worked flawlessly without any repairs needed on the circuit boards. The picture below shows all three outputs simultaneously active but this was possible with a photo burst to capture the center light which represents the infrared emitter which flickers momentarily.

Extensive board testing

The socket for the accelerometer was soldered to the bottom of the test board. This test board only had copper on one face of the board while most boards produced in a fabrication site will have vias (holes through the board) with metal on both sides and lining the hole. This would have made it easier to solder the board in place. Instead, the pins were bent 90° and soldered to the surface of the board.

Socket soldered to underside

The board, along with the accelerometer, was fit into the tagger pipe. Everything fit easily and had sufficient clearance. It may even become necessary to some kind of 3d printed fixture to hold the board in place.

Board and accelerometer inside the pipe


The rest of the posts for this project have been arranged by date

First time here?

Completed projects from year 1 
Completed projects from year 2
Completed projects from year 3

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2017-05-27 (Sa)