Two Transistors in a single circuit

hello everyone,

for project neccessary change current direction inside circuit.
i figured best using 4 transistors able switch each pole.

therefor need control 2 transistor 1 pin, struggle on doing so.

assuming valid data sheet transistor strukture ecb.
i built test circuit try control 2 transistors @ once.

the tansistors functional, because circuit works if take 1 of them out.

why does'nt work? function of transistors did wrong?

please see picture below.

thanks

hi,
welcome forum.

you need google  arduino  h-bridge.

your circuit not reverse current.

your led not work if reverse current through it, unless special 2 or 3 colour led.

tom....

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