The DUE does operate with 3,3 V instead of 5 V like the other Arduino derivates.
Apparently I have a few external devices, which require 5 V to trigger them, like a relay, stepping engine driver and so on.
I could use several transistors, to convert the 3,3 V to 5 V... Never the less this is something I try to avoid.
I would like to know if there is a device to do the logical conversation between 3,3V and 5V like a 1 to 1 gatter IC or something, which is recommanded for those task.
Andreas1984:
I would like to know if there is a device to do the logical conversation between 3,3V and 5V like a 1 to 1 gatter IC or something, which is recommanded for those task.
Apparently I do not have a huge pool of experience working with integrated circuits, so I feel free to ask which of those level shifters you would use if you would go to drive LED's (20mA-30mA) and a RELAY (80mA-100mA) on the 5V side.
To drive LED's and RELAY you can use darlington open-collector driver chip like the ULN2003a or ULN2803a can drive about 500mA.
but the low out put was about 1.1V when conducted and not 0V, however it was not a problem for LEDs and Relays.
Use a logic level converter to drive other logic chips, and ULN2803 or BJTs or MOSFETs
for anything needing real current. Check what current a device can source or sink before
choosing it.
For relays there are probably already relay shields that will work with 3.3V but you
have to check what their input current requirements are, the Due cannot produce
anything like as much current as the Uno and Mega, assume 3mA max until you've
checked the datasheet (different pins have different limits, note).
3mA is plenty to drive a darlington (or a MOSFET if not using high freq PWM). Its not
very much though.