| An alarm which gives its alarm signal at certain repetitive times, does not need to know what the actual time is. It is sufficient if it ca...
| An alarm which gives its alarm signal at certain repetitive times, does not need to know what the actual time is. It is sufficient if it ca...
| The capacity relay consists basically of an oscillator, a detector and a relay driver stage. A length of wire is connected to...
| This is an electronic version of an age-old children`s party game. The game is extremely simple. A large picture of a donkey...
| The alignment of superhet receivers presents problems that may deter some enthusiasts from undertaking their construction. A simple MW supe...
| The Texas IC type SN 16880 N contains all the functions necessary for a stereo LED level meter, which can replace the conventional moving...
| The use of frequency dividers in electronic organs has been known for many years. The usual procedure is to use divide-by-two stages to divi...
| Low-cost domestic burglar alarms often operate on the loop principle. A number of normally closed microswitches protect points of ent...
| In response to popular demand we publish this design for an FM stereo decoder using the Motorola MC1310P. Although nothing is claimed for t...
| A large number of queries at the Audio Fair in London show that many new readers have started buying Elektor from no. 7 on. They have not...
| Wherever possible in Elektor circuits, transis-tors and diodes are simply marked `TUP` (Transistor, Universal PNP), `TUN` (Transis...