Showing posts with label Switching. Show all posts
Showing posts with label Switching. Show all posts
AC to DC 90 Watt Switching Adaptor
AC to DC switching adaptor circuit with best achievement ability of 90W. Switching ability accumulation is congenital application a aerial voltage ability switching regulator IC MC33374 and some added added components. The MC33374 IC is a caked aerial voltage ability switching regulators that are distinctively advised to accomplish anon from a rectified AC band source, and in flyback advocate applications.
The MC33374 switching ability adaptor combines the appropriate advocate functions with a different programmable accompaniment controller. At assorted capricious AC inputs, it is able of confined up to 6 A accepted at 15V achievement voltage. This switching ability adaptor is able of accouterment an achievement ability in balance of 150W with a anchored AC ascribe of 100V, 115V, or 230V, and in balance of 90 W with a capricious AC ascribe that ranges
Simple Digital Switching System
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Digital,
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Switching,
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This circuit can control any one out of 16 devices with the help of two push-to-on switches. An up/down counter acts as a master-controller for the system. A visual indication in the form of LEDs is also available. IC1 (74LS193) is a presettable up/ down counter. IC2 and IC3 (74LS154) (1of 16 decoder/demultiplexer) perform different functions, i.e. IC2 is used to indicate the channel number while IC3 switches on the selected channel.
Digital Switching System Circuit Diagram :
Before using the circuit, press switch S1 to reset the circuit. Now the circuit is ready to receive the input clock. By pressing pressing switch S2 once, the counter advances by one count. Thus, each pressing of switch S2 enables the counter to advance by one count. Likewise, by pressing switch S3 the counter counts downwards.
The counter provides BCD output. This BCD output is used as address input for IC2 and IC3 to switch one (desired channel) out of sixteen channels by turning on the appropriate triac and the corresponding LED to indicate the selected channel. The outputs of IC3 are passed through inverter gates (IC4 through IC6) because IC3 provides negative going pulses while for driving the triacs we need positive-going pulses. The high output of inverter gates turn on the npn transistors to drive the triacs. Diodes connected in series with triac gates serve to provide unidirectional current for the gate-drive.
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