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Practical digital amplifier TL084
Conventional digital home theater amplifier requires the use of a dedicated integrated circuit, and such a small integrated circuit manufacturers, the price is higher. This cir
DA conversion circuit
D/A conversion circuit by the DAC0832 and op amplifier LM358, etc., there are two bad-out channel, unipolar voltage output. Digital output range: OO-H FFH, corresponding to an
Address decoder interface circuit
Decoding circuit: In order to make the various interfaces to work properly, the system needs to assign IP addresses to all ports. According to the number of system interfaces,
Door circuit text display logic pen 2 CD4011
Door circuit logic pen text display can take many forms, either by the inverters can also be used with non-gates, NOR gates, etc. can also be used. A logical pen as shown by th
A digital display timer circuit diagram
Digital timers with a display clear and precise features. It is a number that represents the time after the pulse signal by decoding the digital device with digital display tub
Digital precision pressure tester circuit integrated precision pressure signal conditioner MAX1457
Digital precision pressure tester circuit shown in Fig. MAX1457 external ROM selection 93C66 type 4096b E2PROM. After power MCS end is pulled to a high level, check the main ch
Digital pressure measuring circuit
Digital pressure measuring circuit AD7710/7715/7730 multifunction digital sensor signal conditioning ICs. They integrate a digital interface with the control port, a clock gene
Digital pulse width measurement circuit diagram CD4518 and CD4069 the
Digital pulse width measurement circuit is shown. It uses a l00kHz reference frequency, the count in the pulse width of the signal, the count value of the product of the resolu
A digital display clock signal source CD4543 CD4060 CD4518
Digital display clock signal source circuit shown in the figure is taken from a multi-point detection control box in the actual circuit. It mainly consists of automatic and man
Digital display temperature detection circuit
Digital display temperature detection circuit Precision digital display shows the temperature detection control circuit, MC1403 pin output reference voltage, the potentiometer
Digital integrated circuits using CMOS circuit Responder
Digital integrated circuit enables the answer is greatly simplified. The picture shows four Responder group circuit.
Massage digital display circuit
Display circuit as shown in a typical digital massager. The core of the control circuit is a microprocessor EM78156, it then received instructions manual operation of the circu
Can produce circuits within the range of 1-99% duty cycle of the digital set-precision PWM wave
Dien stone crystal oscillation circuit CM OS inverting clamor ways to ensure work as accurate because it uses a BCD counter Wong (IC2, hi) so maximum oscillation frequency equa
An external audio level display circuit
Condenser microphone pickup signal broken by Iq. amplified and sent as a comparator HJ of lC.., - LC.., And lC: (e - b) each of the negative side, the positive terminal of the
Electronic potentiometer circuit composed of digital circuits
Figure 4-14 is a digital integrated circuit consisting of 16 preset potentiometers Siniperca electronic circuits. It consists of three parts: input into the controller. Presett
Integrated digital volume potentiometer circuit
Figure 4-18 by volume potentiometer T (Xi 153AP and tone potentiometer T ( 155AP consisting of volume, tone control circuit circuit, Rx, cx clock oscillation element, the value
Video speed 6-bit Flash A/D converter
This circuit use the CA3306 a family of CMOS parallel (flash) analogue to digital converters designed for low power, high speed applications. The CA3306CE operates at sampling rates up to 10 million samples per second and the CA3306E up to 15 million samples per second permitting analogue signals with bandwidths up to 5MHz or 7.5MHz to be fully...
Digital capacitance meter
The principle of operation is counting the pulse number derived from a constant frequency oscillator during a fixed time interval produced by another lower frequency oscillator. This oscillator uses the capacitor being measured as the timing. The capacitance measurement is proportional during pulse counting during a fixed time interval. The...
16 bit Analogue to Digital Converter LTC1052
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 Â° C is necessary to eliminate the offset errors of aid.
Simple A/D converter circuit with 2504
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).
For some applications it is important to have a tone decoder with narrow bandwidth and fast response time. This can be accomplished by the dual time constant tone decoder circuit shown. The circuit has two low-pass loop filter capacitors, C2 and C'2. With no input signal present, the output at pin 8 is high, transistor Qj is off, and C'2 is...
FDM stereo decoder
For other input structures see Figures 6 to 11; shown here with PC-filter (Figure ÃŸ). The micropoco capacitor has a temperature coefficient of 125.10"6i 60.10" k"1. In simplified circuits a fixed resistor (e.g. 620k) can be used for a guaranteed switching level Of < 16mV. Either the LEO circuit or an external stereo indicator can be used.
Background music decoder
A resistive voltage divider is used to establish a bias voltage for the input (Pins 2 and 3). The demodulated (multiplex) FM signal is fed to the input through a two-stage high-pass filter, both to effect capacitive coupling and to attenuate the strong signal of the regular channel. A total signal amplitude, between 80 mV and 300 mV, is required...
Two 8-bit dacs make a 12-bit dac
Two MC1408â€”8-bit D/A converters, A and in the circuit diagram, are used. The four least-significant bits of A are tied to zero. The four most significant bits of the 12-bit data are connected to the remaining four input pins. The eight least significant bits of the 12-bit data are connected to the eight input pins of B. The four most...
12-Bit dac with variable step size
The step size of the converter is variable by selection of the high order data bits. The first DAC, A, has a stable reference current supplied via the 10.24 V reference IC and Rl. R2 provides bias cancellation. As shown, only the first 4 MSB inputs are used, giving a step size of 225/256 2.048/16 = 0.127 mA. This current supplies the reference...
5 Mhz phase encoding
Readback data is applied directly to the input of the first NE592. This amplifier functions as a wide-band ac coupled amplifier with a gain of 100. By direct coupling of the readback head to the amplifier, no matched terminating resistors are required and the excellent common-mode rejection ratio of the amplifier is preserved. The dc components...
Successive approximation a-d converter
A bipolar input, high speed A/D converter uses two AM25L03s to form a 14-bit successive approximation register. The comparator is a two-stage circuit with an HA2605 front-end amplifier used to reduce settling time problems at the summing node
This circuit will convert four-bit BCD into a variable voltage from 0-9 V in 1 V steps. The SN74141 is a Nixie driver, and has ten open-collector outputs. These are used to ground a selected point in the divider chain determined by the BCD code at the input, and so produce a corresponding voltage at the output. Accuracy of the circuit depends on...
PLL (Ul) is set with R2 to desired tone frequency. LED lights to indicate lock-up of PLL. Reduce signal level (Rl) and readjust R2 to assure lock-up. Delay is selected from counter U3 output. Circuits latches (turns on Q1 to allow audio to speaker) when proper frequency/duration signal is received
Sca background music decoder
A resistive voltage divider is used to establish a bias voltage for the input (pins 2 and 3). The demodulated (multiplex) FM signal is fed to the input through a two-stage high-pass filter, both to effect capacitive coupling and to attenuate the strong signal of the regular channel. A total signal amplitude, between 80 mV and 300 mV, is required...
Logic probe yields three discrete states
The circuit uses a dual LED. When power is applied to the probe throughthe power leads, and the input is touched to a low level or ground, Ql is cut off. This will cause Q2 to conduct since the base is positive with respect to the emitter. With Ql cut off and Q2 conducting, the green diode of the dual LED will be forward biased, yielding a green...
The injector is a CMOS oscillator with period approximately equal to 1 x Cl x R2 seconds. The values are given for 1 kHz operation. Resistors R3 and R4 divide theoutput to 1 V; Whereas the oscillator employs the gates in their digital mode, the tracer used them in a linear fashion by applying negative feedback from output to input. They are used...
Ultrasonic distance finder circuit
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is measured. There are three main categories of distance measurement methods in use: a) By...
Simple Metal detector circuit with CD4030
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to find something potentially valuable, hidden a few centimeters below the soil. So many...
Fully automatic watering circuit for flower pots
Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This circuit comes as a solution to this problem. Depending on humidity of the pot at...
Simple deep searching metal detector circuit
The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the circuit of this metal detector, it is possible to detect a metal coin in depth of 90 to...
Sub-Harmonic Bass Converter for Electric Guitars
The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound, such as filtering or distortion. Instead, a frequency division system produces outputs...
Echo Depth Sounding Sonar for Boats
In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the calibration of the rope. This arrangement still exists in some yachts. The big...
100W HiFi Audio Amplifier Circuit
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power supply must be symmetrical so that no electrolytic capacitors are needed at the outlet....
Plant-Pot Water Level Indicator Circuit
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower. The circuit of the device is shown in Figure 2. The water detection is made from the bottom...
Analogue Sound Preasure dB-Meter Circuit
The best human ear can capture sounds from 20Hz to 20KHz. These limits are known to be the broadest that can exist. Normally the normal limits range from 100Hz to about 13KHz and depend on the age and health of the individual. We for our measurements and to have a good accuracy we will get the limits of 20Hz to 20KHz. A sound to be heard does...
Digital Signal Integrity
Interconnection and Timing of Digital Circuits
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