Case study
Segment LCD for a Breathalyser
A result the user acts on immediately, with a warm-up state, a countdown and a clear pass/fail indication.
The requirement
A breathalyser has to guide the user through a sequence — warm-up, blow, wait, result — and then present a number that may have legal consequences. The display carries that whole sequence.
What we supplied
- Segment layout with a large result field plus unit and status indicators
- Countdown and progress indication so the user knows when to blow
- Non-numeric pass / caution / fail indication that does not depend on reading the digits
- Low-current backlight for roadside use
Design note
For safety and legal instruments, agree the failure indication before tooling — colour, icon and segment set. It is the part users and inspectors remember.
