Elektor Team (9531)

1-07-1983 | 50 frequency comparator In the circuit described here, a refer- ence voltage level is derived from the comparison of the frequencies of two...

1-07-1983 | 9V 9V 1Nl 51 1T3 2 JJ P1 C1 look 10n 14 T C5 "cl 9V op 1C2 cricket simulator 9+ This simulator gives a faithful repro- duction of the chirp...

1-07-1983 | elektor july/august 1983 52 pulse/pulse train generator This circuit has two modes of oper- ation. If the pushbutton is just pressed once a...

1-07-1983 | 53 offset-Iess 4 MKH rectifier In an active rectifier the offset of the op-amp can cause the rectified output voltage to be incorrect. This...

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...