By Ed Rojas, April 13, 2006
The simple method described here evaluates a one-wire device that uses pulse-width-encoded communications from a PC serial port. Communications errors such as parity and acknowledge are monitored. The hardware interface to the PC is a MAX232 driv
By Ed Rojas, March 01, 2004
A simple, inexpensive method for building a temperature strip-chart recorder involves a parallel port that communicates with four TMP121 IC temperature sensors (Fig. 1). The sensors communicate via the...