Am Montag, 29. Mai 2006 05:50 schrieb Wizard:
>
> How can i flip the pio to = + 5 volts with out adding another relay ? (
> which defeats the purpopse ).
>
> PNP transistor possably ( I Dont know I need hardware expert here)
>
>
No. PNP Transistors are for negative Base-Emitter currents, not for negative
logic.
Put the "+" Pin of the LED of the OptoZZ (or whatever) module to the emitter
of a NPN small signal transitor, e.g. BC54[678]. In addition, you need some
Resistors to limit transistor and LED current.
+5V
|
|
|--+
>---10k Ohm---| e.g. BC547
|>-+
|
270 Ohm
|
+----< OptoZZ +
+----< OptoZZ -
|
GND
Kind regards
Jan
--
Das Schöne an Windows NT ist: Es stürzt nicht einfach ab. Es zeigt
einen Dialog an und lässt dich den Absturz mit 'OK' bestätigen.
-------------------------------------------------------
All the advantages of Linux Managed Hosting--Without the Cost and Risk!
Fully trained technicians. The highest number of Red Hat certifications in
the hosting industry. Fanatical Support. Click to learn more
http://sel.as-us.falkag.net/sel?cmd=lnk&kid7521&bid$8729&dat1642
_______________________________________________
Owfs-developers mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/owfs-developers
