| for battery-operated equipment The low-power switching regulator type 4193, which is housed in an 8-pin miniature DIL package, is designed s...
More about oscillator (484)
| variations on an old theme Although we would not like to make a habit of it, going back to an old design when new components become availabl...
| for frequencies up to 500 kHz The design for a fast analogue to digital converter shown here clearly shows that this type of circuit does no...
| for home and garden A periodic alarm signal has many ap- plications in daily day life: "lights off" indicator in cars, water level in- dicat...
| july/august 1984 with radiation counter All that"s required to erase an EPROM is basically an ultraviolet (UV) lamp which radiates the EPROM...
| ideal for those with perfect pitch It is sometimes useful to have a small instrument that can give a quick indication of the approximate val...
| with digital read-out The circuit presented is not only a suitable replacement of an existing mechanical rev counter, but may also be fitted...
| july/august 1984 . . . uses LEDs We present a new game that might be described as a sort of electronic one-armed bandit. The good news is, h...
| with just six transistors To the best of our knowlegde this is the simplest FM radio that can be made. Not only that but it also works quite...
| can also be used in the 2 m amateur band Many enthusiasts would be in- terested in listening to what goes on in the v.h.f. air band of 108 ....