Elektor Team (9517)

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...

1-07-1983 | 69 R. de Boer UBLI Iyu >Bá UL UH —Ui window comparator This window comparator uses only three CMOS inverters, two resistors, two preset...

1-07-1983 | 70 sea murmur simulator 2V The heart of the circuit is the "mur- mur source" consisting of Ti and R 10. This produces a signal which is o am...

1-07-1983 | 71 W. Schaaij RS 232 P86 o„ VIA 1 T1,T2= BC547B RS 232 printer interface and a few minor changes to the Printer Monitor software. As can b...

1-07-1983 | elektorjuly/august 1983 72 simple stabiliser This is a very simple but nonethe- less reliable stabiliser circuit which can be used in place...

1-07-1983 | 73 electronic switch for audio signals The complexity of the problems as- sociated with switching audio signals is proportional to the sophi...