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> I want to switch on/off and change the rotation direction of the
> electric motor PC-130SF-09400T-NR

http://www.nichibo-motor.com/proType_e.php?proType=5

> So the PIC16F877A should control two electric motors with two
> relay this way.

Paul, to do that with relays you'd need two per motor. One to control
the power supply (ie on/off) and one to change direction

Like this

http://home.clear.net.nz/pages/joecolquitt/varprop4.gif

However, you could replace the power relay with a FET / transistor
between the direction relay and ground. See attached. Turning this
off will break the circuit

The motor has a stall current of only 450mA. Something like a BC639,
and some variants of the BC337 are 800mA. There are several small
FETs that will do 1A
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