Elektor Team (9517)

1-07-1980 | Certain requirements must be met when designing CW filters (CW = carrier wave — basically, unmodulated morse telegraphy). The response cur...

1-07-1980 | 7-70 elektor july/august 1980 IC4 74155 8 51 3 13 11 8 9 11 6 N10 2 IC7 7493 3 10 8 9 12 IC 5 7493 21 3 10 11 Ien IC1 IC2 N1 ... N6 = 1%7400...

1-07-1980 | RO r 1,00 i R3 *R0+141 = 22 k RL = 4k7 6.5kHz Most communication receiver de- signers assume that "anything above 3 kHz can be cut out" and...

1-07-1980 | Those of you who study advertise- ments will have noticed that minia- ture crystals for watches are much cheaper nowadays. These crystals ar...

1-07-1980 | 7-72 elektor july/august 1980 SI 12 03 0310 13 04 IC4 04 74LS175 9 4 Di 01 5O202 2D217 12D303 5V® HEXA DEC. Keyboard DI mim P.STROBE STROBE...

1-07-1980 | 77 Switching power supplies have a number of advantages over the more conventional types. Less heat dissi- pation and a greater efficiency l...

1-07-1980 | 7-74 elektor july/august 1980 This simple little circuit will find a great many uses where pulse width is critical. Opamp Al is connected as...

1-07-1980 | Has the postman been yet or isn"t there any mail today? This question is asked daily by millions of people. As a rule, the answer is to go t...

1-07-1980 | 80 Normally, a centre-tapped trans- former and a bridge rectifier is used to construct a symmetrical power supply. This seems such a natural...

1-07-1980 | —us E RFNT MI RROR CAN., , CAV ABSOLUTE VALUE 2 uwaingsnium SINEW 3 10 SQUARER DIVIDFR • iilhammorm sc°^4s One IC and a single capacito...