Serin serout problem

[lerameur]

I have bought the MCT6 chip (opto coupler)
I grounded pin 3 and 5

If I put a voltage a cross pin 4 should I get the same voltage across pin 6 ??

[Archangel]

I have bought the MCT6 chip (opto coupler)
I grounded pin 3 and 5

If I put a voltage a cross pin 4 should I get the same voltage across pin 6 ??

NO. here is a link to the data sheet'
http://www.fairchildsemi.com/ds/MC/MCT62.pdf

[lerameur]

I actually did the the circuit shown on page 5

http://www.ortodoxism.ro/datasheets/vishay/83645.pdf

still do not work.

[Archangel]

Ok leramuer,
Since I am too lazy to read 288 pages of this post over, I am not going to ASSUME anything. So here goes; Current flow, not to be mistaken with electron flow, current flows from positive to negative. The arrows in LEDs and Transistors indicate the current flow direction. Maybe you know all this, like I said, I will assume nothing. (1) Anyway, if you have a pic which outputs logic High, then you hook that port to pin 1 or pin 4 of the opto coupler, and pins 2,3 would hook to ground.(2) If ypur PIC outputs logic low then you would hook the port to pin 2 or 3, pins 1 and 4 would hook to the positive supply. now if your relay has one leg hooked to positive then the other leg would hook to pin 6, or 7.
If your relay has one leg hooked to ground, then the other end should hook to pin 5 or eight. As I said current flows in the direction the arrows point. It is that simple. CAUTION: Be sure to use current limiting resistors on the emitter side of the opto couplers as they only operate at 1.5v max 20ma so as not to fry them.

[lerameur]

ok I am getting the voltage now
I will be using this to ativate my h-bridge.
also, I am trying to solder a small capacitor (0.1uF) on the terminal of my motor. The solder does not want to stay eith on the pin of the case of the motor, do you have any trick here?

[lerameur]

also,
I dont usually use that and/or have seen this, but should we put resistors to ALL output pins of the microcontroller?

[Archangel]

also,
I dont usually use that and/or have seen this, but should we put resistors to ALL output pins of the microcontroller?

When I used the word pin, I meant the literal piece of metal sticking out of the part. I guess I should have said leads.
The opto coupler is made from 2 LEDs, 2 photo transistors. So in a word, Yes all the opto couplers LEDs should have series resistors.
As far as your PIC goes, I (personally) never leave pins floating out in space, I always tie them to Power or Ground as appropriate to their respective conditions.
I hope you found this to be of value.
JS