Bugbooks I and II were my August-1974 revision of my draft, January-1974, laboratory manual, “Introductory Experiments in Digital Electronics”. Hardware was a significant difference between the two versions. The draft was based upon E&L Instruments’ Digi Designer. Bugbooks I and II were based upon “LR Outboards”**, which were auxiliary functions (four logic switches, four logic indicators, two pulsers, one clock, and one seven-segment display).
The seven-segment display made a huge difference in the educational value of experiments in the two Bugbooks. This display was not available on the Digi Designer. In 2017, individuals and companies that promote solderless breadboarding should be alert to the significant value of the seven-segment display.
Although the 1974 hardware is not available in 2017, it should be possible to dry lab the experiments in Bugbooks I and II. DEFINITION: (a) “To dry lab is to make up data in a scientific experiment, as opposed to observe or experiment in order to obtain it.” (b) “The act of supplying fictional yet plausible results in lieu of performing an assigned experiment.”
Bugbooks I and II were organized as a series of ten chapters:
1. Breadboarding digital circuits
2. Gating a digital signal
3. Truth tables
4. Multidecade counters
5. Decoders, demultiplexers, multiplexers, and sequencers
6. Light-emitting diodes and light-emitting diode displays
7. Busing – tri-state and open-collector outputs
8. Flip-flops and monostable multivibrators
9. Semiconductor memories
10. Registers, counters, arithmetic elements, and Schmitt triggers
Definitions of hundreds of jargon terms are provided in Bugbooks I and II.
For each experiment in Bugbooks I and II, I used a Leroy Lettering set to create a coherent set of schematic diagrams. Breadboarded experiments were created directly from the schematic diagrams.
** Created by David Larsen in the department of chemistry at VPI&SU.