Microcontroller project

      This is my first microcontroller project. An AT89C52 microcontroller with the MCS BASIC-52 located in internal  8K of ROM. 8K of STATIC RAM and 8K of NVRAM are used for program execution and program storage
       A 82C55 peripheral interface feeds the LCD display. A AD558 an 8-bit digital-to-analog converter was added and has yet to be used.The Microcontroller idea book by jan Axelson provides pretty much all of the circuitry that I used.
     The MCS BASIC-52 Language was made public domain by Microsoft a while ago. BASIC-52 was loaded into the 89C52 ROM using an Iquana labs PG302 interface and a ADT87 zif adapter.
     All of this software and a lot more info is on the web. I Have the BASIC-52 instruction manual as a Word file and a small number of programmed/ unprogrammed 89C52 chips available for the cost of shipping. My email address is cbet@aol.com. She ain't pretty, but she works.

Anesthetic gases and workplace exposures

This .gov article just might convince you to do trace gas testing at your Hospital.
http://www.osha.gov/dts/osta/anestheticgases/index.html#C1

Hyfrecator safety issues

The Conmed 2000 Hyfrecator

                This little rascal  deserves some study. I was recently reminded that potential shock or burn hazards can exist. It is most commonly  used as a monopolar, ground referenced ESU with about 30 watts output.  The ground reference is made through the green wire in the power cord. The patient’s body is capacitive coupled through the air to ground, completing the circuit.

            The operators manual describes the necessary precautions to be taken.

I found the operators manual at :

http://www.promed.ie/shop/assets/catalog/parts/Hyfrecator%20200%20Manual1.pdf