| 24 TEST AND MEASUREMENT 8-DIGIT FREQUENCY METER by T. Giffard A state-of-the-art frequency meter module is presented that has an 8-digit, 7-...
More about oscillator (484)
| 60 EE March 1989 EPROM-CONTROLLED TIME SWITCH by J. Vinckier Time switches can take many shapes. Where apparatus has to be switched on and o...
| AM/FM VHF RECEIVER This compact, sensitive, communications receiver has a tuning range of 80 to 135 MHz, covering part of the VHF-low band,...
| 64 EE February 1989 TOUCH-KEY ORGAN A simple-to-build, inexpensive, two-octave organ with touch- sensitive keys etched on the printed circui...
| Described is a digital panel meter- DPM-which is built around a special meter-IC, Type ADD3701, and may be used for the accurate measuring o...
| Repairs to the e.h.t. section of a monitor or a television receiver always carry a certain amount of risk. It makes sense, therefore, partic...
| I ¬?I 1 I LOW-FREQUENCY LC OSCILLATOR It is not always appreciated that LC cir- cuits may be used for generating low frequencies. The propos...
| A calibration generator is used for quickly checking receiver operation. The design shown here generates RF signals (markers) at 1 MHz inter...
| I oI This oscillator supplies an output level between -10 dBm and +3 dBm, and can be tuned between 1250 MHz and 1800 MHz simply by varying t...
| This circuit enables a computer to con- trol the power supplied to a mains oper- ated device (lamp, heater, drill, etc.) in 255 steps. Varia...