More about main (149)

1-07-1989 | 063 GENERAL INTEREST MAINS FAILURE INDICATOR When the mains voltage is present at the input terminals, the transistor in the optocoupler is...

1-11-1988 | The operating principle of the proposed modulator is shown in Fig. 1. Two thyristors, Thi and Th2, are connected in parallel across a variab...

1-01-1988 | APPLICATION NOTES The contents of this column are based on information obtained from manufacturers in the electronics industry, or their rep...

1-07-1987 | by A Treps This circuit was originally developed to detect and signal interruptions of the mains supply to artificial respiration systems. T...

1-07-1986 | 2 mains-based remote controller 69 EE July/August 1986 A7 This combination of transmitter and receiver is based upon the use of the mains ne...

1-07-1986 | C G Mangold 89 audio-controlled mains switch EE 110 July/August 1986 It is often useful for audio or video equipment to be switched off auto...

1-07-1986 | FE 124 July/August 1986 10a mains zero-crossing ‘01 detector Both safe and remarkably simple to construct, this circuit detects the zero c...

1-07-1985 | 401011011, LI 40 pH 3AC93AR1 4, pH 3A L3 mm470n 7W 400V 40 3A 10 19 12 220 V 240 V C1 C3 R2 iemm 4700P/63V 100n 914 BC 557 5k "see text LM31...

1-07-1985 | E ig mains wiring locator The accompanying circuit shows a 9V simple means of locating current- carrying conductors. The detector coil is a...

1-07-1985 | It is often desirable to know at a glance whether the mains voltage is at the low side; for instance, when you are about to work on a comput...