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Machine Controls   A large machine manufacturer needed a control system for several machines. We developed an 8051 based control for the operator interface and for reading control functions . That system is common across the entire line. We then use a PLC to customize the controls to the specific machine. A medical instrument is controlled by an 8051. Control includes two motor controls and a temperature control. The operator controls are on a PC, connected by an RS232 link. Software on the PC takes each individual laboratory specimen's program, and develops a parallel processing algorithm for all of the specimens. By modifying the PC connection from the previous product, we were able to improve the responsiveness of the instrument. A special telephone uses an 8051 to run the keyboard, and set up the dialer for each key. Preprogrammed keys and blocked numbers can also be used. By thorough understanding of the 8051 and the compiler, we were able to program in C for a very limited space. PIC Microcontroller connects an A to D converter on a test board to operator controls on a PC. The PIC communicates with the PC on an RS232 link, and with the A to D converter on an SPI bus. During conversion, the PIC takes many samples, then sends the results to the PC when requested. A second project for that customer repeated the process to create a second demo board for an RTD to Current Loop chip. Tools Include:  8051 PIC Microcontrollers PLC Controllers C compilers for PIC and 8051 Board Design and Layout