20 Solid State Projects for the Car & Garage focuses on solid-state construction projects for use in the car and the garage, including ice-warning indicator, emergency-light flasher, electronic tachometer, and over-heat indicator. The book first elaborates on the capacitor-discharge ignition system, automatic parking light operator, and windshield wiper pause controller. The text then examines lights-are-on reminder, multi-input panel light flasher, ice-warning indicator, and over-heat indicator. Topics include how these solid-state construction projects function, basic and electronic versions of the units, and their construction and use. The publication takes a look at low-fuel-level indicator, emergency-light flasher, lighting-fault indicator, and two-level brake lights. The text also reviews the spotlight time delay unit, suppressed-zero voltmeter, anti-sleep alarm, electronic tachometer, and self-regulating battery charger. The manuscript is a valuable source of information for researchers interested in solid state projects for cars and garages.