I'm about to start a new project using an old solenoid I have - but I can't find a datasheet for it anywhere (and it looks like the manufacturer has been sold on as well). All I know is that it's rated for 9VDC and is a pushing solenoid.
With that knowledge I'm wanting to trigger it using my Arduino, but I need to figure out what transistor to get. I did try getting a resistance reading from it, but it only gave me about 2 ohms. Would I be correct in thinking I need one that can handle over 4.5A on the collector?
Also on a side note - I'm having trouble getting it to fire off a 9V battery, but I can get it to trigger with 4 AAs (6V pack). I know the battery is OK, and it does give a reading around 8.5V.
Thanks for the help