thanks a lot!
Grumpy_Mike, sorry, but I don't know how to connect a PNP and NPN transistors to drive an optocoupler... 
DC42, Obviously your circuit is 100 times better than mine... I will construct it and I will give a feed back.
Miquel
thanks a lot!
Grumpy_Mike, sorry, but I don't know how to connect a PNP and NPN transistors to drive an optocoupler...
DC42, Obviously your circuit is 100 times better than mine... I will construct it and I will give a feed back.
Miquel