OSBee Schematic Question | OpenSprinkler

Log In Register

This topic has 1 reply, 2 voices, and was last updated 8 years, 2 months ago by Ray.

Viewing 2 posts - 1 through 2 (of 2 total)

Author

Posts
February 24, 2016 at 9:35 am #41589

iowabaldguy
Participant

In the schematic diagram, the symbol for QA1 is a FET type transistor similar to QA4 an AO3400. However, it is labeled as 2N3904 which is an NPN BJT type transistor.
Should I use the 2N3904 or the AO3400?

February 24, 2016 at 12:49 pm #41601

Ray
Keymaster

Either is fine. 2N3904 (which is a very common BJT transistor) is cheaper than the AO3400 MOSFET, but if you are building a small number of boards it makes sense to consolidate the component type.
Author

Posts

Viewing 2 posts - 1 through 2 (of 2 total)

You must be logged in to reply to this topic.