Calculates the section modulus and chooses timber beam to comply, then checks the horizontal shear of the selected beam and revises if necessary. 3 options of beam type and loading. Choice of timber grade and allowable stress. 16K.
Timber Beam Design Read More »
16 user-programmable lines; fully TTL compatible.
ZX81 Parallel Input/Output Board Read More »
Improves speed and accuracy of keyboard data entry. The sound varies from a buzzy-chirp to a click and depends on what the computer is doing. Sound is produced when a program runs, so some sound effects can be created. Installs inside computer.
