New Circuits Page 16
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There are a few situations when a power failure is particularly difficult to handle. Some of these circumstances occur in the bathroom. This little circuit will pay for itself many times over the first time it is used, especially if you are in the shower.....
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Here are two photos of the interior of the NSN6054A. The two metal brackets that hold the circuit board in place also function as heat sinks for the 12 watt audio amplifier...
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Sorry, it seems that the file you`re attempting to access no longer exists! The file may have been renamed or removed from the archive. Please use the navigation links on the left to browse the area of the archive you`d like to visit. You are connected to....
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This electronics educational game uses a NAND IC, a Latch IC and a few peripheral components to construct a project that is able to tell who among the four person press the button first ..
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Here`s an another project, which makes an Scrolling LED display. Here 64 leds which are connected to an Matrix display. The Anodes are drived through an Driver IC UDN2981 and the cathodes are drived through ULN2803. The Atmega8515 is used in this project to....
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In order to create the circuitry below, you need a computer software that will control your parallel port. It will cost you about 30 US$. For example, a transistor (model number 2N2222) costs ~50, a DPDT relay, ~1. 75$ (this is maybe the most expensive....
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This be Mini Power Inverter , by use SCR be main part electronics , perform Oscillator Generator 400Hz give Output 300V by use Voltage Input 12V Current....
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The following circuit shows about TL163 IC For Ultrasonic Remote Control Circuit Diagram. Features:detector, high-gain amplifier, low-frequency ....
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This circuit is as shown, simple and clear. The transmitter needs 9 volts and the receiver circuit needs 5 volts...
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The most important part of a school`s CATV-CCTV system, is the process of planning for its infrastructure and the actual plan itself. The schools planning ideally is best facilitated when it involves all the school`s role groups as well as the district and....
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Using just two NAND or inverter gates its possible to build a D type (or toggle`)‚ip-‚op with a push-button input. At power-up the output of gate N2 is at a logical 1`, ensuring that transistor T2 is switched off. When the push-button is pressed the output....
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The USB Performance monitor is a PIC18F2550 based device which shows the performance of your computer using two analogue meters and a RGB LED. The design is based around a stock Hi-Fi VU-meter which is controlled using PWM from the PIC18F microcontroller.....
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Figure A shows the circuit of a direct-trigger timing light. The trigger voltage is taken from the car`s ignition circuit by a direct connection to a spark plug. A circuit using an inductive pickup is shown in Fig. B. A trigger transformer is used to develop....
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We added an external piezoelectric element to set on the bench top, making it easier for kids to reach. We simply soldered this external piezo element to the same pads as the Tap-Tempo Metronome`s built-in piezo element. Here`s the large piezo we used. For....
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The circuit uses two 2N3819 FET`s in cascode configuration. The lower FET operates in common source mode, while the upper FET, operates in common gate, realising full high frequency gain. The bottom FET is tunable allowing a peak for a particular station.....
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A very simple and useful antenna amplifier can be constructed using this circuit diagram. This antenna amplifier is very useful for 35kHz-150Mhz frequency band. This antenna amplifier circuit is based on transistors and has a low 3 dB non-linearity and a....
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Build your own arc welder! Many of you have been so patiently waiting the arrival of these DETAILED PLANS that you can purchase and download (4. 6MB pdf!)for a small fee...
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This example introduces the switch D. C. regulated power supply circuit of buck-mode +5V series. It is composed of power supply circuit, impulsator, voltage sampling or pulse width modulation circuit, buffering driver circuit and it is showed as the picture....
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The use of a quarter-wave parallel-wire line as a tuning unit has been discussed in the chapter on Short-Lines, where it was pointed out that these " circuits " have comparatively high Q even at the higher frequencies. Their great length ( »/4) prevents....
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A very simple low cost water level indicator circuit can be designed using this schematic circuit. This water level indicator is based on a simple CMOS IC CD4066 and indicates the amount of water present in the overhead tank and also gives an alarm when the....
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In order to manufacture large quantities of anything, there needs to be a manufacturing system or process in place. The manufacturing process can be open loop or closed-loop. In an open-loop system, variables are controlled manually. In a closed-loop system,....
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This electronic organ is very simple to construct and can provide hours of enjoyment particularly for children. The circuit is basically an emitter-coupled oscillator composed of T2 and T3. An squarewave voltage can be sampled from the collector of T3(X2).....
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August, 2007One of my other hobbies is photography, and, about a year ago, I purchased a new digicam a Panasonic FZ30. I joined the Panasonic forum on the dpreview site. One of the posters, a programmer and electronic hobbyist, designed a nifty wireless....
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Switch mode circuits can implement the lead acid battery charger with a more efficient. It can be constructed using bq24105 battery charger controller. The bq24105 was originally designed to charge single-, two- or three-cell Li-polymer and Li-ion battery....
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Anyone who frequently builds, repairs and tests equipment powered by mains voltage, will certainly have met with an unpleasant surprise when the plug inserted into the socket (or later) - loud explosion, destruction of equipment, flying pieces of components,....
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Transistor and diode tester in this website is specially design for testing all kind of transistor .using diode principle diode can also be checked.various type of testing circuit you found here ...
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Actually this part of the circuit is isolated from any other component (except via 5v & ground). Other than that, you can find LEDs and a shift register, but I guess they do not interact much. Or do they The ldr is used only as a light sensor. is there more....
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Voltage variations and power cuts adversely affect various equip- ment such as TVs, VCRs, music systems and refrigerators. This simple circuit will protect the costly equipment from high as well as low voltages and the voltage surges (when power resumes). It....
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The idea behind this economical ?ashing LED indicator is very simple: it uses a very low frequency oscillator to drive two LEDs. As can be seen in the cir....
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This is a circuit of 2 x 22 watt BTL amplifier using IC TA8210AH. It is not only an auto amplifier, ideal for a low-frequency auditory approach those hi-fi, with a very good linear feature. Can be fueled by a 12 volt car battery but shi from a 12 volt....
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How do you make a 1950 Studebaker even cooler? By installing an iPod Nano in the dashboard, of course! The folks over at MAYA Design hacked their way to a touch-controlled sound system with this project they`ve dubbed the ""Nano-Baker"" (or ""Stude-iPod"")....
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Low-power two-stage FET transmitter for 80-meter amateur band uses Pierce crystal oscillator that requires no output resonant ci.rcuit. DC milliammeter can be connected across 150-ohm resistor in gate circuit of second transistor to indicate strength of....
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Designing a controller PCB for a 10x10 white LED matrix clock (inspired by the tutorial here ). It`s based off an ATmega328 AVR IC and Maxim DS3234 SPI RTC. However, I`m stuck: I have no idea how to control my custom non-standard 10x10 LED matrix. Originally....
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Make this temperature controlled fan and since i am using 15V AC power supply instead of 230V AC. what i want to know is if i would have to change the triac and the resister shown in the diagram below and also if i can use MOC3041 Triac driver optoisolator....
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Some simple 555 and flip flop circuits to add electronic lighting effects to "modernize" the games. I`m collecting quite a few for different aspects of the game - i. e. idle, flipper shot, flowers open, winning shot etc. I have a few hundred LED`s, 20....
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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, wh...
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Here is an idea for a simple low-cost adaptor that allows a portable FM radio (or MP3 player with FM tuner) to be connected to an external antenna and to audio equipment such as a hifi system or PC sound card. Portable FM radios and some MP3 players....
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The schematic below shows how the +25V DC and -25V DC are obtained. In order to provide power supply for 2 stereo amplifiers, a power transformer rating of 80VA with 240V/36V centre tapped secondary winding is used. The secondary output of the transformer is....
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As my principal hobby interest is now photography and I work crazy long hours at Imatest, I won`t have much time to update this article or answer difficult questions. James E. Lanier`s PSPICE Triode Calculator is a promising program for finding tube model....
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Every self-respecting DIYer makes his own electronic dice with LEDs as spots. Then you don t have to throw the dice anymore just push the button. The electronics also ensures that nobody can try to improve his luck by fiddling with the dice. Too bad for sore....
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how to build own RIFD, use one Microcontroller we can build it. This schematics is Very Simple..
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An efficiency of around 85 % and a power output of more than 200 watts is what you will get from the present design of a power inverter (home built). Complete circuit schematic and building procedure explained herein. You might have come across many articles....
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My smoke machine heater block has broken so I bought a new one, however I removed the old heater block ages ago and I cant remember what cables go where, I have attached a picture of my smoke machine in hope that someone can help me. The only difference....
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This circuit is DC to DC Inverter which , can modify from DC Voltage of Battery 12V be DC High Voltage 300V get. By this circuit has lowness current. Then...
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The two circuits illustrate generating low frequency sinewaves by shifting the phase of the signal through an RC network so that oscillation occurs where the total phase shift is 360 degrees. The transistor circuit on the right produces a reasonable sinewave....
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This is a simple 30V volt meter using PIC16F676 micro controller with 10-bit ADC (analog to digital converter) and three 7 segment LED displays. You can use this circuit to measure up to 30V DC. The possible applications are on bench power supply or as a....
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The target of this project was the design of a small portable mixer supplied by a 9V PP3 battery, keeping high quality performance. The mixer is formed assembling three main modules that can be varied in number and/or disposition to suit everyone needs. The....
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The 22 watt amp is easy to build, and very inexpensive. The circuit can be used as a booster in a car audio system, an amp for satellite speakers in a surround sound or home theater system, or as an amp for computer speakers. The circuit is quite compact and....
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Normally 555 timer circuit even though the start push-button PB1 is not pressed, the timer keeps consuming power From the battery due to a potential divider formed by three 5k © resistors within the IC. this power consumption known as the idling power....
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This is a battery charger circuit, this circuit has advantages, which can cut off electrical charging of the battery automatically. Voltage sensor used in this circuit is the LM301 IC2. This sensor serves to disconnect the battery if the charging voltage has....
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An isolation transformer is a transformer used to transfer electrical power from a source of (AC) power to some equipment while isolating the powered device from the power source,....
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How to transmit data between PC and AVR Atmega8 micro controller using USART module. We use COM port of PC based on RS232 protocol & UART of AVR....
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The goal was to convert this radio for operation on the 70cm amateur radio band. This was unsuccessful as the VCO will not oscillate at the right frequencies for 70cm operation (the VCO control voltage bottoms out before the VCO gets anywhere near the 70cm....
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Here you got it! 300 W rf authentic ability for fm transmission. 300 W radio ability amplifier for accomplished 88 108 MHz ! This fm amplifier has 2 TP9383 abundant to bear up to 300W. ..
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This can be used to convert a byte sent from a microcontroller to a analog value like say 1. 51 V. At full scale, when all 8 bits are high calibrate to give 2. 55 V then ever bit increment is 0. 01V, 10mV steps. If the eight bits inputs are from a counter....
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This circuit is a simple series of tone control circuit. This tone control circuits using OP-Amp LM301A. The JFET 2N3684 provides high input impedance function and low noise characteristics for a feedback buffer op-amps operated type tone control...
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The actual anti-theft system is equipped with two frequency siren and connected to a vehicles immobilizer system. But in the laboratory simulation model; the change of operating modes, triggering of the siren and cutting off of the fuel supply to the engine....
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Many cable testers have been published before, some quite complex, but here`s a cheap and simple alternative. It uses only a 9V battery, two mating connecators and a few resistors, as well as a multimeter for voltage measurements. Begin by soldering the....
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This is a circuit of a voltage-controlled oscillator (VCO) that uses the 555 timer IC as the main component. As expected, the 555 timer is configured as an astable multi vibrator to be able to serve as an oscillator. An astable multi vibrator is just a....
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The schematic shown below is a 555 timer circuit. NE555 is a famous IC comes in 8 pin dip plastic package. There is a huge list of 555 IC circuits due to which this IC is very popular among electronics hobbiests, students and experimenters. The circuit....
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The circuit has a frequency response ranging from 100Hz to 3 MHz; gain is about 30 dB. Field-effect transistor Q1 is configured in the common-source self-biased mode. Optional resistor R1 allows you to set the input impedance to any desired value; commonly,....
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The hardest part of the build was to find and / or design a circuit that could handle the load and still stay with in my budget. This little circuit does both. It varies the power output with one potentiometer (variable resistor) R1. R1 is a panel-mount pot....
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This circuit was designed as a warning flasher to alert road users to dangerous situations in the dark. Alternatively, it can act as a bicycle light (subject to traffic regulations and legislation). White LEDs only are recommended if the circuit is used as a....
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Preamplifier with LA3161 Preamplifiers are used to amplify low level signals such as those from mikes, tape heads before they are fed into power amplifiers. Power amplifiers ar....
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Function generators often play a critical role in the design, testing, and operation of encoders, modulators, demodulators, and measurement instruments. Here`s an inexpensive way to build a bus-controlled sinewave oscillator that has downright low....
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Hello everyone, I need help to modify this light dimmer circuit which is connected to PIC12C508 microcontroller. This circuit is designed for the....
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The three-transistor circuit in Fig 1 costs less than $10 to build, uses commonly available components, and consumes less than 10 mA from a single 9V battery. If you wind coil L1, as the figure shows, the circuit receives signals in the 5- to 15-MHz....
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Two-transistor Darlington connection provides very high input impedance that does not load logic circuit being monitored, while driving LED that glows when logic 1 is present at input.-F. M. Mims, Computer Circuits for Experimenters, Radio Shack, Fort Worth,....
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The electric fence control circuit is composed of the power supply circuit, high voltage circuit and sound and light alarm circuit, and it is shown in Figure 4-26. Power supply circuit is composed of the power switch S, the power transformer Tl, bridge....
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on the desired temperature. The circuit can be used for many purposes for example switch on the fan on the desired temperature or activate emergency temperature alarm etc. The circuit can be powered by a 9 volt battery, adaptor or transformer. The two BC547B....
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Hello all, I ran across this schematic for a watch timer in a hobby electronics book. Anyone built something like this before? My knowledge of electronics is somewhat limited. Here is the description: ""This circuit adapts a frequency counter to measure....
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This experiment is more of an introduction to the 4511 decoder/display driver IC than it is a lesson in how to "build up" a digital function from lower-level components. Since 7-segment displays are very common components of digital devices, it is good to be....
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Developed as interface between General Instruments AY-3-8500-1 TV game chip and antenna terminal of TV set. Adjust C1 to frequency of unused channel to which receiver is set for playing games. Article gives all circuits but covers construction only in....
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This is an old project of mine from about 3 years ago. I was 8 when my father bought me a C=64 28 years ago, and I still remember how thrilled I was t....
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Darlington connection-type transistor is used for the drive of the coil. As for the Darlington connection, 2 stages of transistors are connected inside in series. The "hfe" of this transistor is the multiplication of the "hfe" of each transistor inside. In....
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Camera operation failed on Nokia 2630 has similar solution with the Nokia 2600c because they have the same board. The problem usually caused by the hardware damaged or broken line on the circuit. Here we have some pictures related to Nokia 2630 camera....
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The amount 1. is a block diagram for agenda alarm and agenda thermometer. It consists of 1 temperature sensor, RTC, Microcontroller(PIC), about-face annals, 7-segment and key board. The about-face annals use for aggrandize I/O of CPU becuase it has 13 I/O....
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This is a ADP1821 Step Down DC-to-DC Converter circuit. This circuit uses ADP1821 that is synchronous pulse-width-modulated (PWM), step-down controller,...
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Twilight Lamp Blinker circuit can be built with LDR and single IC circuit diagram with parts list of twilight lamp blinker various project using LDR and many more...