Automotive Arduino Power Regulator

Jonathon Oxer and Hugh Blemings describe an excellent power regulator for Arduino in automotive applications in their book “Practical Arduino Projects”. Loguino doesnt need to be notified about a power failure, but it did seem sensible to be able to provide a buffer which may help when the car is being started.

Parts List

  • IC1: LM294OCT-5 – An automotive grade 5v regulator
  • D1: 1N4001 Diode
  • F1: 3A Fuse
  • C1: 100uf Capacitor
  • C2: 47uf electrolytic capacitor ideally rated to 16v max
  • C3: 47000uf capactor, rated to at least 60v