555 timer circuit to control 12v solenoid air valve (for intermittent bursts of air).

[cropwell]

I would expect the NE555 can not provide enough current to operate the
solenoid valve without the addition of a high gain power transistor

John

The 555 can source or sink up to 200mA, so should be OK to operate most relays directly. The 555 is a useful timer chip, but I tend to use arduinos, especially for really long delays.

Cheers,

Rob