A controversy has arisen as to whether instrument vendors are providing sufficient information about instrument-associated software to permit users to understand invisible data transformations going on inside of the equipment. Topics addressed include software protection, user modifications, and publishing software. (Author/JN)

In this paper a hardware/software system is described which permits the use of the Radio Shack TRS-80 Model I as a tachistoscope in perceptual-cognitive research. Hardware requirements and configuration, problems in developing software routines to handle reaction and stimulus timing using the TRS-80, and the development of a routine for…

Describes a simple apparatus and provides instructions to do relative index of refraction measurements/calculations and to show mathematical relationships betwen indices when light travels from one liquid to another. A listing of a computer program (in BASIC) which will analyze data is available from the author. (JM)

Provides instructions for interfacing a pH meter directly to an Apple II microcomputer without an analog-to-digital converter. Includes program listing (with enough remark statements to make it self-documenting) in Integer Basic to display the pH readings. (Author/JN)

Describes: (1) an apparatus which provides a simple method for measuring Stefan's constant; (2) a simple phase shifting circuit; (3) a radioactive decay computer program (for ZX81); and (4) phase difference between transformer voltages. (Author/JN)

A PASCAL graphics and instrument interface program for a Z80/S-100 based microcomputer was developed. The computer interfaces to a stopped-flow spectrophotometer replacing a storage oscilloscope and polaroid camera. Applications of this system are discussed, indicating that graphics and analog-to-digital boards have transformed the computer into…

Presents 11 short descriptions on the applications of computers in chemistry classrooms and laboratories, including among others, using microcomputer graphics to teach quantum theory, a versatile and inexpensive instrument/computer interface, and a microcomputer-controlled scintillation spectrometer. (JN)

The authors discuss microcomputers and their usefulness in the undergraduate program. The results from a questionnaire indicate their high degree of success with students. (SA)

Continued from an earlier paper are more descriptions of microcomputer systems and applications in chemical education. A number of microcomputer systems are compared. Also listed are five recent references which review popular microcomputers. (Author/CS)

Describes apparatus, computer program (for Apple II), and procedures used in an experiment to determine the velocity of sound in air. In addition, the experiment focuses on the attention required in calibrating equipment and the measuring of both long distances and very short time intervals. (JN)

Discusses use of the VIC-20 microcomputers for laboratory interfacing. Topics considered include the game connections and use of: the ADC0809 A/D converter and timers with the VIC-20; the free-running mode of T1; and the pulse-counting mode of T2. Instructions and diagrams are provided. Descriptions of several programs are also provided. (JN)

Describes development of microcomputer-controlled gamma scintillation spectrometer and chromatographic data analyzer, including design and construction of interface electronics and production of software. Includes diagrams of electric circuits and project evaluation indicating that both instruments functioned as intended. (JN)

Eleven separate reports on computer programs (with sources indicated) and related materials are presented. These include chemical applications of interactive function translator, numerical optimization on microcomputer, Apple pH meter, axes-drawing program for Hewlett-Packard digital plotters, inexpensive chart recorder for freshmen laboratory,…

Describes a procedure used to optimize instrument performance as taught in a fourth-year undergraduate instrumental analysis course. Gives rules for fixed and variable size simplex and discusses calculations. Also explains use of computer simulation of instruments as a tool in teaching the simplex technique. (JM)

Discusses determination of elliptical path of a satellite caught into orbit by the sun or earth; using microcomputer as signal generator (includes program listing); collision process; simple hysteresis loop using double beam CRO; method of demonstrating parallelogram of forces; measuring radius of electron beam curvature; and half-life of thorium…