Some types that are particularly
useful for BEAM robots
Normally, BEAMbots use small signal transistors:
-- 2N3906 (see datasheet
for details), BC327-25
-- 2N3904 (see datasheet
for details), BC337
If you have a more-demanding design (i.e., you need
higher maximum current at greater efficiency), use
-- 2N2907 (see datasheet
-- 2N2222 (see datasheet
Note that the 2N2222 / 2N2907 (also PN2222 / PN2907)
will safely handle 8 to 10 times as much current as the
2N3904 / 2N3906 transistors.
Meanwhile, they only cost a few cents more per device -- you
may just want to buy the higher-current ones and simplify
your work space.
Description coming soon...
Field Effect Transistors (FETs) --
Zetex ZRVN2106 -- see the datasheet
T0-92 is the most-common transistor
will see. Unfortunately, there are multiple pin-out
configurations (standards are wonderful, there are so many
to choose from...). For bipolar transistors,
2 are the most common, depending on which type of transistor
is available locally (BC* transistors
are generally used in Europe and Australia, 2N* transistors
In these sketches, C = collector,
B = base,
E = emitter.