- gyrophone - to make your stereo wander
- how accurate is your watch - quartz precision for mechanical watches
- digital cassette recorder - ensures your bits stay on the tape
- audio signal embellisher - signal restoration with stereo simulation
- universal active filter - five filter modes from one IC
- from thermometer to thermostat - switched out-put for LCD thermometer
- audio sleuth at work - fault finding in audio installations
- wind direction indicator - ""revolving pointer often in shape of cock mounted in high place esp. on church spire to show whence wind blows,"" (OED)
- Z80 EPROM programmer - any Z 80 system with static RAV can be used to program 2716 EPROVs
- home-made low-cost wiring probe - time-saving device for the wiring of circuit boards
- address decoding - why and how an addressable area is organized
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