Popular Circuits Page 159
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This glowing Halloween ghost is available as a kit from the tuxgraphics online shop. It can glow friendly or it can produces scary flashes. You can choose your own face and make a friendly ghost or a scary moster. We wrap a very bright white LED in bubble....
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A simple circuit which is switchable between a sharp cut-off above 2. 5 kHz and a narrow bandpass around 800 Hz. In the low pass (LP) state it can be used on speech as the filter section of a direct conversion receiver. For CW operation, the cut-off....
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A amplifier of force RF for the FM, is always essential for the amateur that wants it strengthens some small transmitter, that likely already it has manufactured or has been supplied ready. The present circuit can give 50-60W RF force of expense, with....
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Uploaded with ImageShack.us Uploaded with ImageShack.us Uploaded with ImageShack.us Hi folks, just wondering if anyone has tried these circuits. The....
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Fans decorative light circuit in Figure 2-130, the circuit consists of step-down rectifier circuit, lattice specific integrated sound and light control roads and other componen..
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Circuit characteristic is the elimination of the external input resistors, thereby reducing the element of the working point stabilization, also uses two DC negative feedback; ..
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Typical circuit for welding equipment shown on the following circuit diagram. Turn on delay can be controlled accurately with Potentiometer P2. We can discharge...
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The circuit comprises a 555 IC as the core. This is designed to work as an astable multivibrator. When we connect a positive 9 volt to pin no. 8, the circuit will produce a sound through speaker. But here the connection to pin 8 goes through the transistor....
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A 315bl excavator. Engine intermittently shut off on its own, but will start back up without a problem. Now machine will not shut off when key is off, happens every day now. I sometimes have to choke off air intake to shut down. most of the time the engine....
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This class of amplifier is designed to follow low level stages, one example is a crystal oscillator. An oscillator for optimum performance can NOT be loaded down, it needs an intermediate stage following. This will then present a sufficiently high enough....
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This amplifier can be used for practically any application that requires high power, low noise, distortion and excellent sound. Examples would be Sub-woofer amp, FOH stage amplifier, One channel of a very high-powered surround sound amplifier etc. For detail....
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Application of the differential amplifier circuit OTL amplifier circuit ..
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This circuit features automatic Exit/Entry delays, timed Bell Cut-off and System Reset. It has provision for normally-open and normally-closed switches and will accommodate the usual input devices (Pressure Mats, Magnetic Reed contacts, Foil Tape, PIRs and....
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The SDR hardware in its simplest form consists of a wideband switched balanced mixer and low noise LF amplifier. This simple hardware has an amazing sensitivity and linearity which is sufficient for test and even regular use. Here are some of the problems in....
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had to rewire a boat trailer due to damaged wiring and lights. I`m using a standard 4 pole flat connection to my truck. The trailer is simple - two rear lights and nbo side markers. Both rear lights are grounded to the harness to the truck. Almost everything....
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The limitation of car supply voltage (12V) forces to convert the voltages to higher in order to power audio amplifiers. This supply is intended for two channels with 50W max each (of course it depends on the amplifier used). Though it can be easily scaled up....
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That circuit is to test the motor servant of the parabolic antenna it is working perfectly, although a system with lnbf is much more appropriate, a lot of people they still use systems using lnb and servo motor. Then the idea of that circuit is to help to....
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The traditional frequency multiplier requires many elements: a phase comparator to detect the phase error between the input and the output signals, a lowpass filter to convert the phase error to a dc control signal, a VCO to generate the output, and a....
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This circuit uses a CA5422 dual BiMOS microprocessor op amp. The bootstrap amplifiers minimize bias currents while maintaining electrostatic discharge protection. ..
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This is a circuit where a microphone and preamp circuit (voice circuit) have priority over any other audio signal. You can think of this as a one way intercom, if the main amplifier is used for listening to music, then when the push to talk switch is....
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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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1.25 ~ 37V as shown for the adjustable power supply circuitry. It is adjustable three-terminal regulator typical application circuit, characterized by good performance, stable,..
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Lithium Ion batteries pack a lot of power by weight compared to other types. There are 2 things that need to be handled differently than nicad on NiMH. They cannot be used as a direct substitute (even if they look like other AA's) since they run at about....
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By selecting capacitors, various voltages can be obtained from this supply. Notice that C2 through C7 must be ..
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The need for a device that can detect and extinguish a fire on its own is long past due. Many house fires originate when someone is either sleeping or not home. With the invention of such a device, people and property can be saved at a much higher rate with....
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A schematic that details the connections to the Clare IXDI404PI chip that is both the brains and the brawn of the Back-And-Forth robot that you can make yourself....
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It functions like almost any 555 astable timer, except that the LED is inserted into the capacitor reset path so that when pin 7 discharges C1 to common, this relatively high current must pass through the LED. In this way, the average battery current is only....
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This Project is used to indicate the temperature and it is also used as controller. The system will get the temperature from the IC and it will display the temperature over the seven segment display and this temperature was compared with the value stored by....
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A simple metal detector circuit diagram and schematic using a single transistor and a radio. This metal detector/sensor project is easy to make and is an application of Colpitts oscillator....
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The TS4956 is a complete Audio system device with three dedicated outputs, one stereo Headphone one loudspeaker drive and one mono line for a hands-free set. The stereo Headphone is capable of delivering more than 25 mW per channel of continuous average....
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The intelligent temperature sensor DS18S20 from Dallas semiconductor is a calibrated precise two resp. three pin device that interfaces direchtly to microcontrollers or PCs producing Celsius readings. The so-called 1-wire protocoll (better "one DATA wire. )....
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This is a simple design of audio level meter. This circuit uses just one IC and a very few number of external components. This circuit is based on LM3915 as controller in the operation of the audio level meter circuit. It displays the audio level in terms of....
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The diagram shows a set of cell diode capacitor connected in series, each set of increasing voltage 300 V. This Supply generates DC high voltage 40kV, with which you can make interesting experiments. With the available 40 kV capacitors, 160 kV output voltage....
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This circuit uses a high quality audio amplifier IC in a 5-pin TO220 package that does not require insulating washers between the metal tab and heatsink in single rail supply applications. The amp can provide 32 watt rms into 4ohm load and 25 watt rms into....
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This is a power generating method from sunlight.This method of power generation is simple and is taken from natural resource. This need only maximum sunlight to generate power. This project helps for power generation by setting the equipment to get maximum....
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When operated as an open loop without compensation, the HA-2400 becomes a comparator with four selectable input channels. The clamping network at the compensation pin limits the output voltage to allow DTLor TTL digital circuits to be driven with a fanout....
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The circuit illustrated here comes to the rescue by sniffing out defective bulbs by capacitively sensing the electric fields they produce ( see the figure ). To understand how it works, consider a string of bulbs with an opencircuited filament, labeled in....
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This 2 meter 144 MHz fox hunt transmitter is used in amateur competitions where a hidden transmitter is to be “hunted†using mostly home brewed receivers....
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A vco using the LM324. I have the schematic to the korg monotron, which uses the lm324 as the IC for the vco, but I am struggling to create a simple circuit in which the lm324 will produce an audible wave form when connected to a speaker. can anyone help....
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In the never-ending quest for simplicity even one extra diode is a price I loath to pay and to avoid using extra components it struck me that the the two diodes in SIMD1 V1 were connected like the two junctions in one transistor. Eureka! replace two....
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Voltage regulator ICs (78xx series) provide a steady output voltage, as against a widely fluctuating input supply, when the common terminal is grounded. Any voltage about zero volt (ground) connected in the common terminal is added to the output voltage.....
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A common need in many systems is to obtain positive and negative supplies from a single battery. Where current requirements are small, the circuit shown is a simple solution. It provides symmetrical +&- output voltages, both equal to one half the input....
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Look for the OSCCON register in the data sheet (as of this edit, page 19). This register, among other things, controls the speed of the internal clock. Upon startup, the processor runs at 31 kHz (way too slow. ) Using OSCCON, we can increase the speed to....
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Active amplified transformer isolated signal splitter that enables hum-free connection of1-guitar to more than1-amp as well as having a direct output Transformers for Audio Interfacing: Discussion on using audio transformers in equipment interconnections,....
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Have a 2003 Ford Crown Vic (Police), Have 3 problems First on Acceleration (hot) sometimes instrument cluster only has it`s back lighting go off and on. Second on Acceleration (hot) sometimes you hear a relay under left side of dash click and all back....
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Home-made antennas can greatly improve the performance of AM and FM radios, short-wave receivers, and scanners. If you are a talk-radio fan then experiment with the AM band antennas and you will be able to hear shows from all over the country with surprising....
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The electronic dog repellent circuit diagram below is a high output ultrasonic transmitter which is primarily intended to act as a dog and cat repeller, which can be used individuals to act as a deterrent against some animals. It should NOT be relied upon as....
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The traditional potentiometer is implemented with an electrical contact that slides over a resistive layer. An example of a well-known audio-grade potmeter is the Alps Blue. I still use this one myself. A high-end (good and costly) alternative is the rotary....
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This is Overheat Detector Alarm Switch using Temperature Sensor IC LM35 Electronic Suite Diagram, at the heart of this overhead detector (fire alarm) circuit is a precision integrated temperature sensor type LM35 (IC1), which provides an accurately linear....
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Here`s a twist to the age-old game of noughts and crosses. Instead of pen and paper, it uses nine 10mm tri-colour LEDs arranged in a 3 x 3 grid. One player has nine red buttons while the other player has nine green, set out in identical grids. The aim, of....
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Circuit shown in Figure 1-560 RPi is treble control potentiometer. Because C3, C4 is larger than cl, C2 capacity, so high-frequency signals, Pat, C4 can be regarded as a short ..
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The following circuit shows about AT90LS2323 Microcontroller Circuit Diagram. Features: 2.7 ? 6 volts, Can work in all 2323 chips. .Component: ...
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This tiny receiver is not much bigger than an AA cell. It is powered off two LR44 button cells, which are expensive and I assume wouldn`t last terribly long. I`ll be on the lookout for LR44`s at the markets and $2 shops now that I`ve got this radio! As with....
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Originally Posted by Neil Davis It`s not a sim. It`s a real measurement from a circuit that has basically the same topology as the Tripath data sheet. ....
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Q1 and Q2 are used to form the basis of an interface circuit for attaching a cassette recorder to the phone line. The circuit does not require a power supply because operating power is drawn from the telephone line itself. The incoming signal is fed across....
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Typical segment displays LEDs consume around 25 mA for each segment and should be limited to it with resistors. If a six digit display is to be current limited, at least 42 series resistors are needed. The brightness of the LEDs are dependent on the output....
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This easy to construct “Handy pen torch†electronic circuit and low component count, uses two power white LEDs for lighting. Low volt (4.8V dc) supply ava....
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The use of power MOSFETs allows a direct interface between logic and motor power, which permits circuit simplicity as well as high efficiency. This speed control circuit can be packaged on a 22-pin, double-sided, 3.5 4-in. pc board. A 12 V control supply....
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A circuit to extract and measure the modulated carrier of an Infra Red remote control. Note that the circuit does not physically separate control pulses from modulation, but amplifies the completereceived signal allowing the waveform to be displayed ideally....
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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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I`d like to make a wideband RF detector. I`m thinking of using a range of resonant LC tanks, 5 to 10 mhz apart, (except / or 1 mhz apart from 9 to....
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An NE592 or LM733 is used as a general-purpose video amplifier in this schematic. J2 and J3 provide two anti-phase outputs. R2 is a gain control. The bandwidth is about 100 MHz. ..
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As shown in FIG grounds efficient, low-power output voltage boost DC-DC converter MAX761 and a few external components, the adjustable power conversion. Its output voltage is d..
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Circuit is shown. It can not only manually, but automatic control. ..
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Many a times one needs an ex- tra telephone ringer in an ad- joining room to know if there is an incoming call. For example, if the telephone is installed in the drawing room you may need an extra ringer in the bedroom. All that needs to be done is to....
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Electronic switch selection, you can achieve multiple temperature control, or a plurality of temperature monitoring points, monitoring. OP27 multiple S-type thermocouple circui..
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Internal telephone circuit is shown as below,improving slightly a toy telephone will become a variable practical internal telephone. This phone is compose of the phone component,decoding circuit,ringing circuit and other components. Using more than two the....
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To convert a standard LCD interface parallel to serial interface model, use a microcontroller or a dedicated circuit such as the MIC 702 Mictronics you can download the complete data sheet and French by clicking this link. This is a circuit specially....
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The circuit connects to the speaker outputs of your stereo or to the back of your speaker. The music passes through the transformer and the volume level is adjusted by the 5k ohm pot. Each light bulb is turn on by a different frequency of sound based on the....
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Circuit shown in Figure 3-139. This circuit uses a rectifier diode rectifier brake for neutral grounding of the three-phase four-wire power supply system. ..
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This is a design circuit for audio graphic equalizers, that are very common as commercial products but circuits for them are very rarely published. This circuit is a simple design circuit. The circuit is needs an op-amp for amplifying the input signal. This....
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Sometimes it is desired to power a circuit from a battery where the required supply voltage lies within the discharge curve of the battery. If the battery is new, the circuit receives a higher voltage than required, whereas if the battery is towards the end....
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When the input voltage is 198- 242V, the mean value of the load current is 0. 5- 1A, the mean value of the output voltage should keep in 15V, the error is smaller than 5% : 1 When the input voltage is 198- 242V, the mean value of the load current is 0. 5-....
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This simple circuit can be used to activate whatever you like, for example, by connecting it to microcontroller, relays, secret alarms, robot applications or just turn on LED1 which lights up as long as you touch the metal plate. The circuit consists of....
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Physicians and repair engineers often use small light pens for visual examination Spurposes. Rugged and expensive as these pens may be, their weak point is the bulb, which is a serviceable` part. In practice, that nearly always equates to expensive` and / or....
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This is the circuit diagram electronic door lock security key system. It means that this security system circuit is the combination of pressed key itself (not the mechanical), the output can be connected to drive the relay to open the door....
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This circuit features an intermittent siren output and automatic reset. It can be operated manually using a key-switch or a hidden switch; but it can also be wired to set itself automatically when you turn-off the ignition. By adding external relays you can....
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This timer uses two 555 ICs to Vary the desirable output. VR1 and VR2 are the potentiometers to change the speed of cycles...
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We aim to transmit more information by carrying articles. Please send us an E-mail to wanghuali@hqew. net within 15 days if we are involved in the problems of article content, copyright or other problems. We will delete it soon. ..
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This variable-frequency, audio bandpass filter is built around two 741 op amps that are connected in cascade. Two 741 op amps are configured as identical RC active filters and are connected in cascade for better selectivity. The filter`s tuning range is from....
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For all those who like to add stuff to there truck(thats about every body) im starting a thread JUST OF WIRING DIAGRAMs Before posting your diagram....
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Many audiophiles reject equalizers for various reasons, some of which relate not to the EQ circuit itself (or algorithm) but to the surrounding "glue" of op-amps, transistors, A/D and D/A converters etc. The only "passive" EQ I`m aware of is horribly....
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2 x 18W Hi-Fi Stereo Power Amplifier based around two TDA2030 ICs. It has good input sensitivity, low distortion, good operating stability and full protection against overloads and output short-circuits. It can be used as a booster amplifier for existing....
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I have been reading a lot of posts about the Lilliput not being able to `auto switch` even though it is in the secret menu, so I decided to make a....
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Volt meters & ampere meter with PIC can be used to measure voltage and current simultaneously. The series of volt meters & ampere meter with PIC16F876A PIC is used as a data processor voltage and current are measured. This circuit uses the viewer in the form....
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Change the smart cards into manual push buttons to set the energy consumption so that the consumer will need not worry on where to buy smart cards. is this a possibility we also don`t have enough supply of smart cards here in out location. we are planning to....
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This version of the Link is for those who really need a good cheap intercom that will work reliably, but without access to an outside Telco line. This could be in a pre school, a hobby farm or a small workshop or factory, where external phone traffic needs....
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This AM radio circuit is a low power transmitter working on broadcast band. The simplicity is implemented using a single-transistor amplifier stage, and for....
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This circuit is designed around a 4049 hex inverter/buffer. Two inverters are used ina dual-frequency signal-injector circuit, another inverter is used as a logic probe, and the remaining three inverters are used as a sensitive dual-input, audio-signal....
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To guarantee reliability, the server system designer must consider hot-swap circuit parasitics and the associated transient behavior. The designer should use a TVS (transient voltage suppressor) diode clamp at the line card input. Experimental measurements....