Table of Contents

Connections and components - component identification; 555 timer projects - timer, one-shot, touch alarm, heads/tails, general purpose astable, audio guitar tuner, visual metronome, flip-flop indicator, circuits and layouts; Op-amp projects - dusk/dawn switch, pressure operated switch, frost indicator, time-delay indicator,variable frequency oscillator, mixer preamplifier, dynamics monitor, window comparator, circuits and layouts; counter projects - bar count metronome, electronic dice, red LED/green LED game, "trigger happy" game, number shaker game, circuits and layouts; Nand-gate projects -touch/moisture detector, precedence indicators, "latch and catch" alarm, pulse tone alarm, circuits and layouts; miscellaneous projects - general purpose amplifier, intercom, radio receiver, two-octave divider, three-valve music-maker, variations on a theme, circuits and layouts, extending the circuit.