New Circuits Page 256
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The circuit was designed to work with an audio power amplifier which operated off +18v-0v-18v power rails. The actual voltage used is not too critical except that the feedback is referred to the LED chain which itself is anchored to a +12v rail, hence the....
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The elements diameter of the antenna may vary between 5...8mm and the dipole diameter may
vary between 8...12mm (12mm recommended) without the need of changing anything to the length or spacing.
All elements except the dipole are electrically connected to....
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This timer was designed for people wanting to get tanned but at the same time wishing to avoid an excessive exposure to sunlight.
A Rotary Switch sets the timer according to six classified Photo-types ...
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This Intercom is powered by two 9volt batteries and uses only current when the Intercom is used.
Both units are connected via a two-wire little cable or simply two wires (dotted lines). The loud speakers act both
as loudspeaker and as a microphone.....
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A complete schematic diagram of the voice disguiser is shown. Microphone MIC1 picks up the voice signal and feeds it to an audio amplifier, consisting of Ql and Q2, and a few support components. The amplifier has a low-pass gain response that limits the....
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This is a very useful circuit for those who want to transform a stereo Power Amplifier, to mono, bridging two channels from him , reversing the phase of the one power amplifier [R] and the polarity, with these connections we can have 4X times the output....
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For a transistor to conduct, it requires a voltage of about 0.6 between its base and emitter. This voltage is applied from the wiper of the 47K pot. Now if the pot is at minimum, this voltage is across the 22K, so the 47K will have about 1.28v across it - or....
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This circuit for multiplying the width of incoming pulses by a factor greater or less than unity is simple to build and has the feature that the multiplying factor can be selected IYJ adjusting one potentiometer only. The multiplying factor is determined....
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Since the late 1970s, designers have successfully improved the effective resolution and spurious performance of A/D converters by adding ditheruncorrelated noiseto a converter`s input and then using DSP techniques to average out noise from the converted....
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Completed STK465 is an amplifier of acoustic frequencies that offers qualitative output, using minimal exterior elements. Substantially he is one of big completed force. Has a line pins and incorporated metal surface for adaptation in cooler. The provision....
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This circuit warns the user against fire accidents. It relies on the smoke that is produced in the event of a fire. When this smoke passes between a bulb and an LDR, the amount of light falling on the LDR decreases. This causes the resistance of LDR to....
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The standard circuit will display directly in Hz (1MHz max), and there is a seperate on board divider that will allow you to display directly in KHz (approx 40MHz max). Becuase the display reads directly in Hz or KHz there is no need for decimal point....
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This circuit provides power control without running line-voltage switch leads. The primary of a 6-volt filament transformer is connected between the gate and one of the main terminals of a triac. The secondary is connected to the remote switch through....
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The synchronous oscillator (SO) and the coherent phase-locked synchronous oscillator (CPSO) are universal multifunctional networks that track, synchronize, and amplify as much as 80 dB; improve SNR by as much as 70 dB; and modulate AM, FM, and FSK signals...
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This model is very simple and charges as long as you hold the pushbutton:..
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When a processor-controlled device must operate reliably, designers often choose to periodically reset the processor rather than rely on a watchdog configuration. In low-power systems, this periodic-reset circuit can consume a large part of the system`s....
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Data acquisition applications that require low power dissipation
fall into two general areas: products that must use
power very efficiently, such as battery-powered portable
test equipment, and remotely located data logging equipment.
To help meet these....
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Adding a pair of one shots to the output of a 567 tone decoder renders it less sensitive to out-of-band signals and noise. Without the one shots, the 56Tis prone to spurious output chatter. Other protection schemes, such as feeding back outputs or using an....
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The circuit can be culled from the MCP2120 developer`s kit user`s guide.
It is on page 51 of document DS51246A. If you don`t want to use an integrated
transceiver, there is a circuit for you to build your own with a seperate
ir led and detector. Make sure....
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Many designers opinionate that NFB loop controlled amplifiers are inferior because they degrade the sound, and yet I wonder what it is that these individuals think they actually listen to ? The fact is that most vinyl waveforms and CD pits, as pressed into....
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The tuned circuit consists of a variable capacitor and fixed air spaced coil. For the coil, I wound between 10 and 20 turns of wire on an empty tube of around 1.5 inches diameter. The turns were spaced so that the overall length was around 3 inches. The....
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Two conventional amplifier stages built with SF215 transistors are linked by ceramic 10.7MHz IF filters, and followed by an FM demodulator built with a TBA120T i.c. Straight from the databook. Output goes via a 100k log potmeter (not shown) to the audio....
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The detector circuit is made up a two-amplifier multiple feedback bandpass filter followed by an ac-to-dc detector section and a Schmitt Trigger. The bandpass filter (with a Q of greater than 100) passes only 5Q0 Hz inputs whch are in turn rectified by Dl....
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This circuit relies upon the extra high input impedance of a FET, and also demonstrates
the gate terminals sensitivity to changes in voltage. The gate terminal here is left open circuit, connected only to the "probe" this being just a few inches of bare....
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With the coupler biased in the linear region by the 10 mA dc bias on the IRED and the voltage divider on the phototransistor base, photodiode current flows out of the base into the voltage divider, producing an ac voltage proportional to the ac current in....
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A sensitive electret microphone picks up the sound and feeds the signal to a two-stage amplifier circuit, consisting of Ula and Ulb. The amplified output of Ulb is fed ·to a voltage-doubler circuit (comprised of Dl, D2, C4, and C5). The output of the....
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One of the most interesting projects to work with is that of a synthesizer that can accurately gnerate desired frequencies. This synthesizer uses just three CMOS chips and one PNP transistor. It is a fact that the transistor may be the hardest component to....
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D2025 Dual audio power amplifier circuit D2025 is a stereo audio power amplifier integrated circuits, power amplifier for use DIP16 package applicable to all types of portable ..
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Figure (a) shows the output amplifier circuit 170W at 4 loads; LM4651 is a former circuit class D amplifier, a 28-pin DIP package, the internal equivalent circuit is shown in (..
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Fans are hoping to make a high-quality amplifier, but the most outstanding publications published on the circuit, they often too complex and difficult to start 6 This article d..
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FIG automatically shut down by the circuit is a MOS FET to achieve. When the headset is inserted, the contact off, MOS tube grid connected high, the tube guide pass., feet grou..
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FIG dual-channel circuit LM378 dual operational amplifier composed of Europe. Supply voltage Ub 24V and 8 ohm load (or 16 Euro), the output power per channel 4W. Circuit with i..
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FIG OCL power amplifier circuit is an integrated circuit. Circuit IC1 is an integrated circuit, its internal circuit configuration is substantially similar to the integrated ci..
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Europes leading SGS-THOMSON STMicroelectronics recently introduced a tone quite new to the Chinese mainland hydrazine fos power integrated amplifier TDA7294, swept past the lin..
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Enthusiasts know that the headphones directly into the universal headphone jack to listen to VCD, the sound quality is not high and the tape player to listen to reason D headph..
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Due to the rapid development of integrated circuit technology, an integrated circuit amplifier also come out in large numbers, its technology and performance indicators have re..
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Electronic tube amplifier lovers started his art that simple, excellent single-ended Class A circuit should be the first choice. Single-ended Class A tube amp with a mellow, sw..
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Figure 4-20 is HAD250A-3 active speakers and amplifier circuit integrated amplifier circuit LM3886 thereof. The circuit uses 25V power supply, output power up to 50w 2, to meet..
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Electronic switch is a multifunctional preamplifier. It consists of five-way touch electronic switch, high-speed DC servo RIAA ultralow distortion amplifier. It can be volume, ..
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Figure 3-2 (b) is the second half of the circuit, VT17 ~ VT31 group into power amplifiers, pre-amplifiers, and it is a structure composed of exactly the same oIC2 its zero serv..
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Figure 3-25 is a hybrid having four input preamplifier, in the circuit, cZ1, cz, C23 and cz4 respectively, can enter the microphone, line, phono and crystal head signal. Quad c..
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Figure 1-97 is a ten-band equalizer circuit with a first connection thereof. FIG lC is the utility voltage amplifier, R7, respectively, equivalent to the island in Fig 1-92 Rl,..
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Figure 1-98 is a double five-band equalizer circuit composed of a second connection. FIG IC1 IC14 respectively equalizer per channel utility voltage amplifier; ICLl, IC24, IC 2..
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Figure 1-99 with a five-band equalizer equalizer circuit TA7796 specific integrated circuit composed of the circuit in the public electricity voltage amplifier, an analog induc..
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Figure 3-16 is a low-noise preamplifier equalizing HA12017 consisting playback circuit, the circuit R3, R4 and C4, in line with standard maggots balanced network. The gain stag..
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Figure 4-33 and using substantially the same circuit configuration, the common amplifier and analog inductive circuits are provided, but its analog inductive circuit transistor..
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FIG is a decay feedback tone control circuit. In the tone control circuit both have anti-attenuation Fed action. So high, in the end it is to enhance or attenuate the bass, and..
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Electronic bass equalizer type of two quad op amp circuit, you can use TL084 high-speed operational amplifier circuit shown in Figure 9-680 left and right channels through R1, ..
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Figure 4-7 pitch analysis using the relation obtained above design calculation control circuit, where Ai is a buffer to put the big stage, to reduce the burden preamp output. L..
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DF data transmission module operates at 315MHz, the use of surface acoustic wave resonator SAW frequency stabilization, high frequency stability. When the ambient temperature i..
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FET has high input impedance, high input impedance amplifier can be made. However, FET amplifying device, the distributed capacitance and the Miller effect input capacitance of..
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F733 Integrated wideband amplifiers common-emitter group total wideband amplifier internal feedback circuit is small, zoom capability, good circuit stability, is a common ampli..
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DBS-20-type leakage protection circuit ..
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Current Transformer H11-3 need be made. Choose not less than 2W transformer core, the first secondary winding. With µ0.12mm enameled wire around 1000 turns. Primary use µ1 ~ 4m..
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Current leakage protection is currently the most used and best leakage protection device. Current leakage protector fork into electromagnetic and electronic two, two leakage pr..
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Due to the different circumstances of the various input signals, when the pin is applied between the abnormal voltage, protection circuits to form a circuit path from while LSI..
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Diode and thyristor can withstand over-current and over-voltage of poor, short-term over-voltage over-current will damage the components, but can not complete the full potentia..
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Figure 4-27 (b) line than in Figure 4-27 (a) line more than a capacitor, to improve and increase the output current waveform DC voltage. Figure 4-27 (b) line shown can be used ..
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DC generator automatic voltage regulator circuit is shown in Figure 7-53. This circuit is used to 40kW, 230V DC shunt complex machine, the voltage change rate up to 2.5 percent..
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Coop automatic controller described in this case, capable of sheds light, temperature and humidity automatically adjusted to increase egg production rate and survival rate of c..
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Cutter is protected by a printed circuit phototransistor constructed to prevent manual feeding mistakenly stepped on the cutter switch and cause accidents. The line at the time..
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Electric power limiter circuit limits the user load, making household appliances in a given normal operating current range when the load exceeds a given value, the power supply..
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Dual power automatic recovery means one power supply, one power standby when the power supply off, standby power legislation that is automatically put into operation, and when ..
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Drinking fountains automatic control circuit diagram as follows: ..
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Easy Auto power battery charging circuit Is shown as a simple automatic power battery charging circuit, the circuit can automatically power off when the battery is fully charge..
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Electronic Winder points manual, electric, semi-automatic winding machine variety, this example describes a winding machine with electronic counting feature that lets users coi..
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Constant current protection circuit type, since the over-current and short-circuit, the output current is limited only to a certain value, the output voltage drops, the overcur..
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DC motor (brushless DC motor) double-loop speed control system, the speed controller output torque (or current) signal given. It can be used TL494 as a current regulator and cu..
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DDR memory power supply circuit Shows the notebook DDR memory power supply circuit, the power control circuit chip MAX8632, the chip power supply terminal VDD is Sv (detection ..
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DC shunt regulator power supply circuit Shown is a DC power supply circuit in parallel using the radio circuit, after the AC 22V output voltage by the step-down transformer 8V ..
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DC power supply with shunt, the rectifier, filter, current limiting, voltage regulation, 10V voltage outputs, the circuit is simple, low cost, to meet the requirements of vario..
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DC power supply: DC power supply with shunt, the rectifier, filter, limit, the regulator points jsIJ ~ string disabilities 10V, the circuit is simple. Cost low, can meet the re..
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DC power supply under-voltage, over-voltage indicator circuit shown in Figure 13-93, use it to monitor the DC power supply voltage is normal. When the supply voltage is 12V, ad..
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DC panel battery is widely used in power plants, substations DC system. To make the current system more safe and reliable operation line may be as shown uninterrupted power sup..
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Figure (a) is the use of a microprocessor power supply circuit constituted LT1587-3.45. Figure (b) is constructed using the LT1585 output voltage adjustable power supply. Figur..
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Constituted by the peripheral circuits MIC5158 simple 5V input, 3.3V/10A output linear regulator circuit is shown. When the circuit when the input voltage Ui 5V, plus the N-cha..
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FIG. A ~ c circuit has a high coefficient of voltage. If the regulator resistance rz is constant, while maintaining the delicate balance of the bridge situation has infinite vo..
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FGDF-3 three-phase low-temperature iron plating power supply circuit KGDF-3 low-temperature iron plating power supply device having a single-phase low-temperature iron plating ..
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Expand integrated three-terminal regulator block circuit output current method ..
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Error processing segment is converted to a pulse width modulated (PWM) signal output from 3 feet (MC signal). Also calculate the differential position error, which represents t..
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Dual power for each complex since load is supplied by means of two-way power Meanwhile, when the way in which the power outage, contact switches from closing movement, not by t..
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Dual power for each load refers to work simultaneously by the two-way power supply and two power supplies, respectively, the burden of electricity load. When at the way in whic..
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Digital Cameras -DV machine power supply circuit It shows a digital camera/DV machine power supply circuit, the circuit MAX1800 chip to control the core. The figure shows that ..
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Computer memory power supply circuit (NCP5201) It shows a typical computer memory power supply circuit. The circuit is a dual-output circuit, NCP5201 power management chip, ..
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Cookers detection control circuit The control circuit shown in cookers for testing. Inductance coil disc lesion is generally about 150 pH. Stove plate coil and capacitor resona..
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Cookers pot quality detection circuit Shown as cookers pot quality detection circuit. Pot quality testing is by disc lesion induced voltage (EMF) to achieve. ..
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FIG demodulation and detection circuit is a radio, AM intermediate frequency signal IF amplifier after a two-stage detection performed by the diode Dr, the audio signal from th..
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Drawing, transistors constituting the gate VTi, VT2, VT3 and the like. ..
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Constituted by a circuit block diagram MAX1463 precision pressure detection system as shown in FIG. Bridge pressure sensor output voltage connected to the MAX1463 IN1 +, IN1- e..
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Consisting of integrated analog multiplier MC1596 synchronous detector as shown in FIG. The demodulated signal may be any amplitude modulated signal from the integrated circuit..
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D switch S location function. FIG microphone to a speaker on behalf of the (also designed a door using an electret microphone) port channels through C9 send people IC2 amplify ..
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Dctl is a two-stage amplifier, the first stage amplifying transistor VT1 collector voltage U..
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Diagram 2 shake tube n. Capacitance C. Trigger voltage rectifier filter element. H is a trigger voltage transistor amplifier circuit, three pull tube n, U, v. Composition trigg..
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DW l11 capacitor step-down into Jenru half crossing according to Yin electrical hoof. After receiving bin CI Sh power output terminal to liVI/r j Right cut blood flow voltage, ..
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Darlington is a tube made double clam touch switch circuit is characterized by a touch sheet and 20V AC mains through the power transformer T isolated, relatively safe. After t..
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Construction of buildings, when full power is not required fluorescent continuous operation, the application dimmable electronic ballasts can further reduce power consumption w..
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Fade fades the lighting circuit switch shown in Figure 1-12. The figure for the light switch S, H is accused of lighting. Transistor VT1, VT2 and RC components fade dimming con..
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FIG VDI ~ VD4 form a bridge diode rectifier, a full-wave transform the 220V AC pulsating DC, all the way for the red, green and blue (ie HI ~ H3) electric lights, another way t..
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Constantly changing light and sound analog controller circuit 05 ..
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Engaged in indoor portrait photography comrades know, single camera alone - Hong ye states pictures are often missing lack layering. In order to obtain better shooting results,..