Like everyone else in the hobby / profession I felt I needed a timegrapher though even the cheep ones were out of reach. So I tried to find something for a phone app and came across this as a free pc down load.
About Watch-O-Scope - Watch Timing System It requires an OP amp to work, but also gave plans to make it, the PC board, and a mic stand. I thought since I know how to solder and can read a schematic I'd give it a try. It's my first from scratch project and am happy that it turned out. I went with a breadboard because I didn't feel the desire to learn to etch anything at this time. It's obviously not finished but it works. I have no idea what the graph represents so I'll just have to learn.
About Watch-O-Scope - Watch Timing System It requires an OP amp to work, but also gave plans to make it, the PC board, and a mic stand. I thought since I know how to solder and can read a schematic I'd give it a try. It's my first from scratch project and am happy that it turned out. I went with a breadboard because I didn't feel the desire to learn to etch anything at this time. It's obviously not finished but it works. I have no idea what the graph represents so I'll just have to learn.

