J
Jamie Morken
- Jan 1, 1970
- 0
Hi all,
I have an ignitor that has a resistance between 0 and 10 ohms and I would
like to output a voltage between ~0V and ~5V proportional to that resistance
(to check the ignitor resistance). The maximum current I can put through
the ignitor is ~0.5mA for safety. The circuit I have so far uses a
differential amplifier using an opamp:
http://www.rocketresearch.org/new/ignitortester.jpg
I need to squeeze four of these circuits into a small PCB area as this is
going on a small rocket electronics board. Any ideas on how to simplify the
circuit or other circuits that I could use to do this? Thanks for your
time,
cheers,
Jamie Morken
I have an ignitor that has a resistance between 0 and 10 ohms and I would
like to output a voltage between ~0V and ~5V proportional to that resistance
(to check the ignitor resistance). The maximum current I can put through
the ignitor is ~0.5mA for safety. The circuit I have so far uses a
differential amplifier using an opamp:
http://www.rocketresearch.org/new/ignitortester.jpg
I need to squeeze four of these circuits into a small PCB area as this is
going on a small rocket electronics board. Any ideas on how to simplify the
circuit or other circuits that I could use to do this? Thanks for your
time,
cheers,
Jamie Morken