More about LED (792)

1-07-1982 | This LED field strength meter can be connected to FM receivers in which the CA3189E IC is used in the IF stage. An example is the FM, IF sta...

1-07-1982 | The problem of not having the right IC to hand is an well known stumbling- block for constructors: When a VCO is required urgently, the idea...

1-07-1982 | 7-84 — elektor july/august 1982 Since their introduction in the early 70"s OTAs have become a classical component for voltage controlled f...

1-07-1982 | The circuit diagram shown here is a National Semiconductor application of the LM/XR 13600, in this case used as a kind of state-variable fil...

1-07-1982 | connection tester In the April issue of Elektor, we published a circuit for a contact tester with an acoustic indication. As a result of thi...

1-07-1982 | One IC, a quartz crystal, three resistors and two switches are all that is required to obtain 16 different frequencies! Can it be more versa...

1-07-1982 | Not another TTL squarewave gen- erator?! Surely, there are plenty of them in other issues of Elektor? Yes, but this is an oscillator with a...

1-07-1982 | People with a passion for hifi equipment and active speaker units are bound to have sought ways in which to switch on the output units via t...

1-03-1982 | Large-gap semiconductors are potentially useful materials for the manufacture of light-emitting diodes. Their spectral range now includes th...

1-01-1982 | 1-12 — elektor january 1982 selektor Electronic technology greatly benefits the disabled The year 1981 was nominated the "Year for the Dis...