Help building acceleration detection device/circuit for my bike
Option 1:

This is a perfect application of a microcontroller. Using a micro would allow you be a lot more flexible about the specific operation of your project. You could easily add features such as logging acceleration over the course of a trip, or specialized filtering of bumps.

Option 2:

If you want a solution based on discretes (either for learning or for speed of implementation).







simulate this circuit &ndash; Schematic created using CircuitLab