Showing posts with label 9. Show all posts
Showing posts with label 9. Show all posts
Tuesday, November 12, 2013
Static 0 to 9 display With 7490 7446 IC
The Ciruit apparent here is of a simple 0 to 9 display that can be active in a lot of applications. The circuit is based on asynchronous decade adverse 7490(IC2), a 7 articulation affectation (D1), and a seven articulation decoder/driver IC 7446 (IC1).
The seven articulation affectation consists of 7 LEDs labelled ‘a’ through ‘g’. By advanced biasing altered LEDs, we can affectation the digits 0 through 9. Seven articulation displays are of two types, accepted cathode and accepted anode. In accepted anode blazon anodes of all the seven LEDs are angry together, while in accepted cathode blazon all cathodes are angry together. The seven articulation affectation acclimated actuality is a accepted anode blazon .Resistor R1 to R7 are accepted attached resistors. IC 7446 is a decoder/driver IC acclimated to drive the seven articulation display.
Working of thiscircuit is actual simple. For every alarm beating the BCD achievement of the IC2 (7490) will beforehand by one bit. The IC1 (7446) will break this BCD achievement to agnate the seven articulation anatomy and will drive the affectation to announce the agnate digit.
The seven articulation affectation consists of 7 LEDs labelled ‘a’ through ‘g’. By advanced biasing altered LEDs, we can affectation the digits 0 through 9. Seven articulation displays are of two types, accepted cathode and accepted anode. In accepted anode blazon anodes of all the seven LEDs are angry together, while in accepted cathode blazon all cathodes are angry together. The seven articulation affectation acclimated actuality is a accepted anode blazon .Resistor R1 to R7 are accepted attached resistors. IC 7446 is a decoder/driver IC acclimated to drive the seven articulation display.
Working of thiscircuit is actual simple. For every alarm beating the BCD achievement of the IC2 (7490) will beforehand by one bit. The IC1 (7446) will break this BCD achievement to agnate the seven articulation anatomy and will drive the affectation to announce the agnate digit.
Wednesday, September 18, 2013
Microphone Pre Amplifier 9 12Volt Discrete
Microphone Pre-Amplifier 9-12Volt DiscreteThis is a microphone pre-amplifier ambit that use detached components. The accretion of this ambit is 100 and should be abundant for best microphones. It is set by the arrangement of the 10k resistor to the 100R. As common-emitter amplifiers, This ambit uses two anon accompanying transistors. Here is the schematic diagram of circuit:
Please agenda that this ambit has no bent voltage source, so you can’t use with condenser blazon microphones. You can use this ambit with activating blazon microphone, or condenser electret bore with alive ambit central (any microphone which is able with array central can be used).
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