Hi, I use a home grown proto board (5V) with a PIC16F88 w/bootloader and a Max232 chip to load programs via the pc serial port. I would like to communicate to a TI CC1101 chip via SPI. The TI CC1101 radio chip has voltage range of 1.8V to 3.6V. Does anybody have a simple level conversion circuit or a favorite chip they use to convert the 5V to 3V and vice versus ? Thanks, Kevin -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist