Elektor Team (9503)

1-07-1989 | RAM EXTENSION FOR BBC-B COMPUTER P. J. O"Shea The original BBC microcomputer has one serious shortcoming: lack of user RAM. In the highest s...

1-07-1989 | 4 If your amplifier is fitted with two balance controls (as, for instance, the Elektor Electronics Preamplifier for Purists - Ref. 1), it ac...

1-07-1989 | 002 COMPUTERS RESET FOR THE PC 1640 The PC1640 is one of Amstrad"s popular and successful series of compact PCs. It has, unfortunately, a se...

1-07-1989 | 003 CAR ELECTRONICS A defect car light is at best a nuisance and at worst a danger. Fortunately, most new cars are equipped with suitable mo...

1-07-1989 | Otherwise properly mixed sounds often suffer from a predom- inant solo voice (which may, of course, be the intention). If such a voice needs...

1-07-1989 | 005 POWER BOOSTER FOR 7406/7407 It often happens that a digital signal is required for controlling a relay, a stepper motor, or other kind 1...

1-07-1989 | 006 POWER SUPPLIES When a voltage regulator is supplied from a mains adapter, it sometimes happens that its output is too low (because the o...

1-07-1989 | The radio beacon band extends from 280 kHz to 516 kHz. Each beacon has its own characteristic AM modulated morse-coded call sign that is tra...

1-07-1989 | 8 008 TEST & MEASUREMENT Although the NE604 is, strictly speaking, intended primarily for h.f. applications, it may be used for a number of...

1-07-1989 | 009 RECORDING CONTROL AUDIO & HI-FI The circuit presented here is intended as a recording level control for cassette recorders. It enables t...