Please, can you explain why i need capacitors to input?
How i can lower voltage to 3v3?
Please, can you explain why i need capacitors to input
1.0mF will be ok?
but i need to power an 23k256 too, that work with 3v3. How i can lower voltage to 3v3?
That part is an SPI device so you will have to lower the drive voltage from the arduino. What I have used for this is a 74LS07 open collector buffer. You get 6 in on IC package, the inputs come from the arduino and the outputs to the SRAM with a 1K8 or so pull up resistor to the SRAM's 3V3 supply. The output of this chip can be fed straight into the arduino.
why you are suggesting using a 74LS07 instead of the simpler option of a voltage divider?
Quotewhy you are suggesting using a 74LS07 instead of the simpler option of a voltage divider?Voltage dividers can often slow down the rise time of the edge given the capacitance of the input. On the Ada wave shield their version 1 had voltage dividers but they changed to level translators for version 2 because of the trouble the users were getting with dividers. With a buffer ( which I already had so that was a plus factor for that part ) the falling edge could be very fast and the rising edge controllable by the size of the pull up resistor.