how can i multiplex the serial out's from 4*8M's to display in turn on a serial lcd display.
The Problem... I've got 4 * PC type fans, each a different size and airflow. all are 3 wire (power and tacho). I want to use differing sizes of fans to understand the ratio of airflow to noise to speed etc.
4 identical 8m's are to be used to pwm control these fans, dependant on temperature read from a ds18b20 or thermistor on each 8m channel.
The temp measurement, fan speed, and tacho signal stuff is mostly done and quite simple, but I've no idea how to read 4 serial channels in turn.
all suggestions welcome
Thanks...
The Problem... I've got 4 * PC type fans, each a different size and airflow. all are 3 wire (power and tacho). I want to use differing sizes of fans to understand the ratio of airflow to noise to speed etc.
4 identical 8m's are to be used to pwm control these fans, dependant on temperature read from a ds18b20 or thermistor on each 8m channel.
The temp measurement, fan speed, and tacho signal stuff is mostly done and quite simple, but I've no idea how to read 4 serial channels in turn.
all suggestions welcome
Thanks...