Elektor Team (9517)

1-07-1983 | 54 RC generator This tone generator uses two RC networks (all-pass filters) connected in series to achieve the necessary phase shifting. The...

1-07-1983 | 55 interior temperature control for cars The single most important part of any car is its driver and it stands to reason that the better the...

1-07-1983 | 56 VFO with variable inductor An LC oscillator as shown in figure 1 is not exactly something new: transistor T1 is connected in a common bas...

1-07-1983 | elektorjuly/august 1983 57 amplified triac drive A well-known shortcoming of vir- tually all electronic components is their sensitivity to t...

1-07-1983 | action flash Very fast acoustic electronic-flash releases as used by professional photographers and in quick-motion film apparatus for actio...

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...