17 years ago
I have a fuel level sender and LED gauge from a privately built
aircraft. It uses a strange implementation of an LM3914 dot/bargraph
LED display driver IC. The sender is a standard type and is
constructed from linearly wound resistance wire with a range from 10R
to 100R. I'll post the circuit later, but in the meantime does anyone
know of any design rules covering fuel tank senders? I ask this
because the wiper arm and spring loaded rotating contact are very
intermittent, making me wonder how it is possible for electrical
contacts to safely operate in the presence of petrol vapour.
Presumably there is oxygen in the tank, too.
- Franc Zabkar
-- Please remove one 's' from my address when replying by email.