| pH meter elektor march 1985 Determining the pH value of an aqueous solution is one of the more important measurements in inorganic chemistry...
| pH meter elektor march 1985 Determining the pH value of an aqueous solution is one of the more important measurements in inorganic chemistry...
| speech for microcomputers phoneme synthesizer with Centronics input A phoneme (Greek: "speech sound") is a basic sound unit in a language. E...
| with or without a computer turnout (points) control Turnouts (points) are usually controlled remotely by the use of electro-magnetic drives...
| new keyboard for Spectrum... elektor march 1985 When Sinclair introduced a new Spectrum last autumn, they at last acknowledged that the poor...
| 19 kHz precision calibrator elektor march 1985 a simple test- instrument calibration aid 19 kHz precision calibrator Test instruments are es...
| versatile counter circuit elektor march 1985 Counter circuits have long been a tradition in Elektor. It started with one of the very first i...
| darkness-sensitive light switch elektor march 1985 As can be read almost daily in any newspaper, the number of burglaries in private residen...
| As the title implies, this project is not intended to make hi-fi buffs sit up, but rather to meet the many requests for a simple active loud...
| transistor unitester elektor march 1985 G. Fossa n Many electronic components may only be fitted into a circuit in one way: the polarity mus...
| gyroflash elektor february 1985 from an idea by F. Lemoine gyroflash five sequential rotary flash tubes controlled by a single circuit Pract...