I have a use case for a deluxe tachometer system.
- two cycle engine
- four plug wires
- inductive signal detection (wire wrapped around plug wire) tinytach.com
- 12v powered tachometer
- one digital display per plug wire
- small four digit digital displays for a small footprint.
Details: This will be a backup system for the main engine instrument. In this case the primary rpm is being derived by the stator plate turning on the engine it's self. I need to have independant rpm from the spark being sent to each plug, not how fast the engine is turning. There are inductive tachometers available (tinytach.com) but they are large and I would need four. At $50ea that's $200 in tach's plus the mounting would look bad, also the tiny tach's use a sealed battery and I want somethign that just runs off of the native 12v battery. I have limited space to mount these displays but a lot of room behind the panel for the "guts".
I have not used arduino before however I am a network engineer but am not comfortable with writing programs from scratch but am good modifying other peoples code. I have been looking for a project to use an arduino and this may be a great first with real practical use case.