On 6/11/2012 8:52 PM, neil n wrote:

> The archives mentions using 12 volt or higher rated capacitor, but will a
> 10 Volt Tantalum capacitor be ok?

Tantalums tend to explode and burn, leaving nasty byproducts around, if
overvolted. I wouldn't even use a 10 V tant in a 10 V circuit, you need
to have some margin. "12 V," in automotive terms, really means
13.something volts, which is what the alternator puts out when charging.
The voltage in the air sensor is probably regulated to something lower,
but I'd still use a 20 or 25 V cap. They tend to last longer when not
pushed close to their limits, too.