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Active crossover circuit with TL074
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An audio source, like a mixer, preamp, EQ, or a recorder, is fed to the input of the Electronic Crossover Circuit. This signal is either AC or coupling, depending on the setting of switch 51, the non-inverting input of buffer amplifier Ul-a, a section of a quad BIFET, low amp TL074 noise made by Texas Instruments op. This stage has a gain of 2, and its output is distributed to both a low pass filter made by R4, R5, C2, C3, and Uld op-amp, and a high-pass filter made by R6, R7, C4 , C5, and op amp ULC. These are12 dB / octave Butterworth filters. The response of the Butterworth filter was chosen because it gives the best compromise between the damping and phase. ..
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| Clicks: 9979 | Votes: 0 | Comments: 0 | Rating: 0 | Rank: 0
Tone Doorbell circuit
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When the door is pushed, you hear a whisper that "slide up" to a higher frequency. The oscillator frequency is determined by AF coupling capacitance, C 1 and the value of the resistor connected between the base of IQ and the earth. This resistance, RBG is equal to (Ri + R2) RJ. First, suppose that 51 is closed and R2 have been adjusted to produce a pleasant, low frequency tone. The capacitor C3 charges through R6 until it reaches such a tension that will cause diode Dl to conduct.
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| Clicks: 770 | Votes: 0 | Comments: 0 | Rating: 0 | Rank: 2
Bell circuit with two 555 timers
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This simple Bell circuit uses two 555 timers. The frequency is controlled by the capacitors that must be preserved almost identical in value to each other for best results. Fine tuning is done with R1 and R2. ..
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| Clicks: 13349 | Votes: 0 | Comments: 0 | Rating: 0 | Rank: 4
Chime Circuit with 4049
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Resistor R1, capacitor C1, and two converters form a square wave generator, which produces the basic tone. The generator is sui followed by an inverter which serves as both a buffer and a driver for the President. The resistor R2, which has a minimum value of 100 ohms, limits the power and volume controls. The diode D1, capacitor C2, resistors R3 and R4, and two in converters to create the pulse generator which determines the power-up and decay times of the ring. ..
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| Clicks: 3701 | Votes: 0 | Comments: 0 | Rating: 0 | Rank: 0
Differential A/D Converter circuit CA3110
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By using an op amp BiMOS CA3140 provides good orientation skills for high bandwidth signal input, and can quickly adjust the energy output at its terminal CA33IO WINE. The CA3140 can also lead to near the negative supply rail...
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| Clicks: 10034 | Votes: 0 | Comments: 0 | Rating: 0 | Rank: 0
Cyclic A/D converter circuit
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The cyclic converter consists of a chain of identical stages, each of which detects the polarity of the input. Step V REF then subtracted from the double entry and the rest if the polarity is correct. The signal is full wave rectified and the rest of V IN - V REF is doubled. ..
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| Clicks: 4244 | Votes: 0 | Comments: 0 | Rating: 0 | Rank: 5
Simple A/D converter circuit with 2504
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Time IO-bit conversion is 3.3 MHz with a p 3. Clock. This converter uses an approximation 2504 12-bit register in successive operating mode where the short-cycle end signal conversion is taken from the first bit used in the SAR (QLO)...
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| Clicks: 17485 | Votes: 0 | Comments: 0 | Rating: 0 | Rank: 1
High Speed A/D converter 12-bit
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This system performs a complete conversion of 12 bits in 10 p unipolar or bipolar. This converter is accurate to ± 12-bit LSB Y2 and a typical gain TC of 10 ppm / ° C. In unipolar mode, the system range is 0 V to 9.9976 V, with each bit having a value of 2.44 mY. For the accuracy of true conversion, an A / D converter must be trimmed so that, given the results just the exit code of input levels of Y2 Y2 LSB LSB below to above the exact voltage represents the code.
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| Clicks: 17222 | Votes: 0 | Comments: 0 | Rating: 0 | Rank: 3
A/D Converter with LT1018
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The converter has a 60-ms conversion consumes 460 pA of 1's. 5 V power supply and maintains an accuracy of 10 bits on a 15 ° C in the temperature range of 35 ° C. A pulse applied to convert the command line causes Q3, operating in reverse mode, the discharge path through the diode 10 kO, forcing its collector low. Q3 results of reverse mode switching in a capacitor discharge to 1 mV of ground. During the time of the ramp value is less than the input voltage, output of the CIA is low.
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| Clicks: 16923 | Votes: 1 | Comments: 0 | Rating: 6 | Rank: 2
10 Bit A-D converter circuit
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Each time a pulse is applied to the conversion of the control input, Ql resets the 1000 pF capacitor to 0 V. This action takes 200 ns to reset the falling edge of the convert command pulse, the capacitor begins to charge linearly. In exactly 10 microseconds, it loads to 2.5 V. The ramp is 10 microseconds applied to the positive input of the LTl016. The LT1016 compares the ramp Ex, the unknown, its negative input. For a 0 V - 2.5 V range, Ex is applied to the resistance of 2.5 k ohm. ..
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| Clicks: 13737 | Votes: 0 | Comments: 0 | Rating: 0 | Rank: 7
16 bit Analogue to Digital Converter LTC1052
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The circuit here is a A/D converter, that consisting of A2, a flip-flop, some doors and a current sink, is based on a current balancing technique. Again, the stabilized LTC 1052 50 no drift of V input 1 ° C is necessary to eliminate the offset errors of aid.
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| Clicks: 3436 | Votes: 0 | Comments: 0 | Rating: 0 | Rank: 0
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| Clicks: 9060 | Votes: 0 | Comments: 0 | Rating: 0 | Rank: 1
Metal Detector circuit with TDA2822
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Here is a simple metal detector with TDA2822 and few NPN transistors. There is a small arrow connected from the Emitter of the T3 to the 10n Capacitor C4. That arrow is simply indicating signal flow as right to left in that particular wire, which is different from the remaining circuit's left to right. ..
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| Clicks: 5403 | Votes: 1 | Comments: 0 | Rating: 6 | Rank: 4
14 Bit A-D Converter with ICL7134B
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The circuit ICL7134B base is a bipolar input AID converter broadband, using two AM25L03s to form a successive approximation register 14-bit. The comparator is a circuit with two stage amplifier HA2605 front, used to reduce the settling time problems in the pro summing node (see A020). Warning nu11ing offset of this amplifier is needed and if wide temperature range operation is desired, an auto-zero circuit using a lCL7650 is probably desirable (see A053). The clock, using two gates TTL Schmitt trigger operates at a slower pace for the first 8 bits, where the settlement time is more critical than for the last 6 bits.
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| Clicks: 10235 | Votes: 0 | Comments: 0 | Rating: 0 | Rank: 4
Input pulse width controller circuit
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The quad operational amplifier circuit yields full 0 to 100 percent pulse width control. The controller uses an LM3900 requires only a single supply voltage of 4-30 V. The pulse repetition frequency is set by a 1 kHz oscillator amplifier that integrates AI. The oscillator feeds the Az ramp generator, which generates a linear ramp voltage for each pulse oscillator. The ramp signal feeds the inverting input of comparator A3, the control voltage feeds speed non-inverting input. Thus, the output of the comparator is a 1 kHz pulse train, pulse width that changes linearly with control voltage. ..
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