Elektor Team (9512)

1-07-1983 | 59 temperature indicator 1N414£ 547B The temperature indication of a heat sink on a power transistor in high power circuits can be extremel...

1-07-1983 | i e detector The principle of a lie detector may be considered welf-known: emotional states are not only betrayed by a faster heartbeat and...

1-07-1983 | 61 H.J. Walter N2 4 69 electronic pocket-pinball This highly portable pocket-pinball game may not exactly be a substi- tute for its big brot...

1-07-1983 | 62 simple sawtooth generator Relt 81 P1 250k Sawtooth generators are frequently required in most branches of elec- tronics. We therefore fea...

1-07-1983 | optical voltage indicator This circuit indicates, by means of a flashing LED, when a voltage being monitored or measured falls below a prede...

1-07-1983 | heatsink thermometer This thermometer was designed for measuring the heatsink temperature of a Crescendo power amplifier, but it can, of cou...

1-07-1983 | elektorjuly/august 1983 65 o n/off with a single push button A very useful function expressed in a 1 simple circuit that is suitable for man...

1-07-1983 | L. inexpensive 45 MHz crystal filter A receiver with an intermediate frequency, IF, which is higher than the highest received frequency, fc,...

1-07-1983 | I~ low colt CMOS lock A decimal keyboard, a CMOS IC, three transistors and an opto-coup- Ier ... that is about all that is needed to make th...

1-07-1983 | elektorjuly/august 1983 glitch suppressor in position 2), glitches will not be detected. A signal at the input of Nl is inverted and applied...