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Rangkaian OpAmp (Operasional Amplifier)

Sunday, May 9, 2010

Connect the battery or adapter with this audio mixer circuit. Enter Casset deck, or microphone output at input A1. Slowly rotate P1 toward maximum until the loudest sound was obtained but not broken. After that turn slowly toward a maximum until P4 obtained loudest sound but not broken. The same process performed on the input A2, A3.

Do not forget the time adjustment of S123 in the open position (ON position). After adjustment is complete, do not be amended again except P456 P123 that serves as a volume.

This audio mixer output can be connected to other recording media such as tape recorders, Cassette recorders, computers and much more. In addition, with the two LM 3900 you can have 6 channel audio mixer. Enough to build a simple studio and receive orders.

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Skema Rangkaian Adaptor

Fig circuit above can be applied to create an adapter or power suplly with the output voltage (V DC 12V output). Power supply above will only be protected by a capacitor as a safety when the power supply is connected with the burden on the circuit. Therefore recommended to use 35V capacitor with a minimum specification. To power the power supply more security we can menggunakkan TIP transistors, but I have yet to discuss it. For the diode bridge can be collated from four diodes then you solder into a bridge rectifier or you can buy a comb-shaped bridge rectifier (sideways) or the box. At least I would suggest using the diode bridge 1 Ampere, in a series adapter, the bigger the better way ampere diode currents in the circuit. Diodes like highways, and flow as the car passed. The larger and the width of existing highways, the faster the flow of runs and through the circuit.

For the 5 V power supply circuit, you can replace the above-volt regulator with the type 7805 and 7905. This application applies equally in this circuit. For variations, such as fuse or circuit switch on / off you can try yourself.
Skema Rangkaian Adaptor

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Rangkaian Penguat Inverting

There are two types of amplifier circuit that we often hear that the amplifier inverting (flipping) and Non-inverting (no reverse). For the circuit above is the type of inverting amplifier circuit. The above amplifier circuit using the IC which is often used and easy to find the op-amp IC LM741. To more easily understand the working principle of this amplifier circuit is deliberately examplize circuit is quite simple. Because by being able to understand the working principle of this circuit you will be able to easily understand the development of a series of Op-Amp rangakaian this as ADC (Analog to Digital Converter), DAC (Digital to Analog Converter), summing (sum) and others.

In the circuit on the input signals to be strengthened is one volt AC signal with a frequency of 1 Hz. The amount of amplified gain is divided by the input resistance of strengthening prisoners-R5 / R4 = -30/10 = -3. To determine the voltage gain of the output is x Vin = -3 x 1 volt = -3 volts. The minus sign shows the opposite phase with the input signal. This means that if the input signal is positive, the output signal will negatiif and if the input signal the output signal is negative then positive. For details try to notice the picture above input and output signals. The input signal is red and blue output signals. Vertical lines indicate the voltage and the horizontal line indicates the time. Signal input voltage 1 volt at the position (Vpuncak = 1V2 volts) and the output voltage is 3 volts (Vpuncak = 3V2 volts) are consistent with the strengthening of which is 3 times larger than the input signal.
Rangkaian Penguat Inverting Gambar

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