Top Circuits Page 159
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The electronic lantern control circuit adds high-efficiency dimming and flashing to an existing battery powered lantern orflashlight or to a custom design. For the car it makes a great lamp for changing a flat tire, back seat reading or emergencyengine work.....
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The circuit presented here usesNAND logic gates of Hitachi HD seriesIC HD74LS00, which is a quad NANDIC. Special technique has been employedto obtain three-state operation usingjust a single IC. Gate N1 is wired such that when theoutput of gate N1 is at....
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Before applying power, check for shorts on the board. This design runs from a FIVE volt supply, connecting it directly to a 12 volt supply will kill it for certain. The current drawn is very small, in the region of 70mA so connect a small 5V regulator in....
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Control monitoring equipment at a TV repeater site. It had to accept commands sent as DTMF tones over the repeaters audio channel and be able to switch either AV signals or power supply feeds at currents up to 1 Amp. The switching requirements left no option....
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When the detect subroutine is called, it first waits for a start bit. The length of the low part of the first start bit is measured. If the low pulse of first start bit is longer than 1. 020 ms or less then 800 uS the routine returns indicating error or no....
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The next stage is working with the first stage as well it is a fully-complementary. The cascode circuit is also in this place to improve linearity of the amplifiers. Cascode circuit requires a constant reference voltage biasing to make a cascode transistor....
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Most FM tuners from this era suffer from two major problems. They have a high and reactive output impedance, and the grounding scheme inside the unit is at best dubious. This is a unit from the era when single sided boards where standard issue. The near....
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One of the EL34 output valves had blown, the normally silver coloured getter had turned white completely. When I opened the amp, I noticed the remains of a trimpot, including some melted solder, lying on the bottom cover of the amp. Its value was only just....
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The brake pad warning light is designed to come on when the front brakes wear down to about 25% left on the pads. It is triggered by an insert in the pads that has two wires attached. The wiring and pad is part of a ground loop that starts at the instrument....
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Tweet Hey guys, I have a question about electronics. One project ive been intending to do is something simple: make a circuit which makes an LED flash ....
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One thing your not suppose to do to an old radio or TV that hasn`t been run for many years is just go and plug the thing in and flip the power switch on. The best thing to do is use a device called a Variac which allows you to slowly bring up the power to a....
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Ladder logic programming method is a method commonly used in electrical simulation schematic control system programming languages evolved. A circuit control system but the basic purpose of the decision in some cases all the load circuit should be opened or....
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Function Generator Virtual Oscilloscope Sound card based multi-functional design, and virtual function generator Microcontroller based Function Generator Design and Implementation of graduation. The total program function generator Generally refers to the....
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The drive circuit is the basic drive, recently made a case, is the need 27mm passive piezoelectric buzzer sound over 100dB, and power consumption to as low as possible, due to product cost and structural size limitations, only with S8050, and N-channel....
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thermocouple cold junction compensation and the MAX6675 converter circuit diagram of temperature measuring system composed of The circuit components are used:Temperature measurement system composed by the MAX6675 circuit diagram as shown. K-type thermocouple....
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The transmitter function is to modulate the original signal frequency of the signal carrying the message, the process is called modulation, the circuit realization of this function is called frequency modulation circuit. al of the circuit. FM tuner is....
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WPG DM8168 DaVinciTM high-definition video SoC Trident Multiple DVR / NVR surveillance solutions MT9M033 image sensor Lord of the safety monitoring system, the best solution for passive components Conexant Conexant`s line of multi-channel video surveillance....
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The simple bell circuit without IC reward points: 0 | solution time : 10:20 | Asked by: Zhang Dan QiaoThanks for Related Content who simply doorbell doorbell circuit 19 music circuit, integrated circuits, transistors and resistors, respectively, what is the....
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Battery charging circuit, power supply via Q2, Q6, R8, D10 constant current charging the battery. When external power supply, the charging current through R8, D10 to charge the battery, and the charging indicator light D1Figure: Fire emergency light circuit....
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How to do the landscaping project supervision programs were recommended by satellite relay protection and automatic safety device static General table three remote program information Petrochemical Engineering Construction Electrical Transmission inverted....
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Double-ended working core square wave inverter transformer area product formulaBm is the maximum magnetic flux. Transformer primary side of the switch S1 and S2 in parallel with IRF32055 only reason why parallel, mainly because access to the load in the....
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The two drawings using the LM324 op amp to form a lower voltage comparator, resistor R1, R1 component partial pressure circuit, the op amp A1 is set at a level U1; resistor R2, R2 voltage divider formed for the op amp Comparison of A2 to set the level U2.....
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Diagram shows a timed light control switch circuit in Mexico, especially for outdoor advertising light boxes street lamps and power control, it is time saving switch circuit. Now with the door switch to manual control of lights and more, often forget to turn....
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To quickly determine the remote control transmitter is good or bad, you can use the remote control detector as shown. If the detected remote control transmitter is good, it will instantly audible alarm signal. The detector can be used to detect various types....
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PDS is taken to address these shortcomings of standardized measures to achieve a uniform material, unified design, unified routing, unified installation and construction, make the structure clear and easy to centrally manage and maintain. So now the new....
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Car Inverter (Power Converter, Power Inverter) is a way to convert the DC DC12V and AC220V AC mains the same for general electrical use, is a convenient vehicle power adapter. Car power inverter has been generally welcomed in foreign markets. In foreign....
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This example describes use of HS101, HS201 radio transmitter and receiver modules made of radio-controlled rotating color lights, it is essentially a multi-channel radio remote control device codes for a small dance floor or home use. Users stand on any....
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Pulse motor or stepper motor step motors, foreign, or commonly known as Step motor Stepping motor, Stepper, and so on. To the conventional stepper motor, the stepper motor can be simply defined as, according to the input pulse signal, each time changing the....
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It is mainly composed of permanent magnet with the disk, integrated Hall sensor, strobe gate, time base signal circuits, power counting and digital display circuit. Counting and digital display circuit using CMOS-LED digital display component CLlO2, it can....
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The design of the current application of the wider selection of VHDL hardware description language to realize the intersection traffic light system controller hardware circuit description, in the Altera`s MAX PLUS EDA software platform environment through....
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Be sure to mark clearly on the circuit diagram of a part of each type and size! Thank you! Satisfied with the answer, and additional! Do not tell me there are very general site, so I am looking for. Thank you, brothers and sisters, brothers and sisters,....
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Ultrasonic cleaning machine is a humidifier (do not believe you removed and see) circuit is very simple, just an ultrasonic oscillator! Ultrasonic frequency signal generated by the transistor (20-40Khz or so) received a transducer (piezoelectric buzzer in....
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It consists in 555 feet, respectively, of 1, 2-cited two-pin, using two needles with a high water level higher than 555 when the probe capacitance between 1, 2 feet circuit leaving 555 low potential output. Contrary to the output of high potential (555....
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Any diagnosis of the power top system should begin with the use of a scan tool and the proper Diagnostic Procedures Information. The scan tool can provide confirmation that the Programmable Communications Interface (PCI) data bus is functional, that all of....
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AutoZone Repair Guide for your Driveability And Emission Controls Emission Controls Evaporative Emission Controls....
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AutoZone Repair Guide for your Engine Performance & Emission Controls Components & Systems Camshaft Position Sensor....
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Need to amplify the output of the iPod`s headphone jack would not be enough to provide the chip with a large enough signal to respond to, but this was because I had been researching three different chips. The LM3914 is a linearly calibrated device, so its....
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Quote: Originally Posted by rntlee The only schematic of this amp I`m aware of is this one(I got it from Song @ Canadian Hifi Online):Attachment 238521 It`s possible ....
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My CM7777 preamp has failed. I want to determine if the failure is due to the power supply or the preamp itself. Does the power supply output a DC voltage on the ....
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I was messing with the receiver settings , and in the Digital Audio menu , the default setting was OPTICAL .. i changed it to COAX and the sound is better and ....
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I am trying to build a monostable multivibrator so that I can use the output of an IR circuit to trigger a relay for n seconds thru the one shot. I found a chip ....
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This is the first part of my Arduino controlled PWM RGB LED project, featuring distance / PIR sensor control and sleep mode....
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The Flash MC Experimenting Board I is an ideal platform for all developements in conjunction with the Atmel Flash microcontrollers AT89C1051, AT89C2051 and AT89C4051. It is not only recommendable for starters but also very much recommendable for the advanced....
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The Flash MC Programmer II is a fast parallel port programmer for several 40 pin 8051 microcontrollers....
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If you have a power source which will provide 2. 5Vdc at 10uA this circuit should drive a pager motor. It turns on the motor at 2. 3 to 2. 5Vdc and switches off at 1. 2 to 1. 5Vdc. Both Steve and I have built ( bread boarded or haywired) the business end of....
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The following is a copy of an article posted by Wilf Rigter to the original BEAM email list and as such represent an important historical and technical reference The NuStepper is a circuit designed by Wilf Rigter, using a 74AC86 quad X-OR chip to make four....
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The Schmitt trigger is a special circuit which acts like a switch that changes state at two different thresholds. These are called the upper and lower threshold or the positive and negative going threshold. The difference in these two threshold levels is....
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BEAMers tend to learn quickly how to scavenge parts needed to build their projects from technoscrap. But there are always going to be times when buying new parts and/or materials will be necessary. This is getting to be case even more so, as "Application....
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A term used when referring to a robotic control concept, developed by Rodney Brooks, which is strongly associated with Behavior-based robotics, a branch of robotics research that incorporates modular Behavior Based AI Whereas traditional Artificial....
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Voltage depletion is also called "sag" by some folks. The same general concept I`m covering in this project may be referred to as a 9v sag circuit. I learned to avoid using the word "sag" as many folks confuse it with tube amp sag which is an entirely....
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The microcontroller (MCU) is responsible for sending variable voltages over time (just like a traditional LFO) to an effect that can be modulated by a voltage, or a pot on a traditional analog effect that can be replaced with an optoisolator/vactrol. Here`s....
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The orange lines indicate the positive voltage and the yellow lines indicate the negative voltage, also known as ground. You can do the wiring by soldering components directly to wires, or use a small bit of perfboard/circuit board. To ensure this thing....
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This is a simple JFET input buffer that goes into a clean boost based on the old Electro-Harmonix LPB-1 Linear Power Boost. The guitar input is buffered and then split off to four input points. These input points can then go on to various other modules in....
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Beige Bag Software has been providing affordable and innovative circuit design tools since 1990. B2 Spice provides schematics as well as analog, digital and mixed mode electronic circuit simulation. Integrates with EAGLE and CADSTAR PCB software....
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A dual channel audio preamplifier as an appropriate preamplifier for the high quality Audio Analog to Digital Converter AD24QS. It is, of course, easy to build a much smaller and much cheaper preamplifier with comparable functionality, but making it cheap....
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The DA24DS is a double speed (up to more than 96kHz) version, slightly smaller and cheaper than the DA24QS, particularly intended to be built as a module into e. g. CD players. The DA24QS operates over a wide range of sample rates. The S/P-DIF receiver-IC (....