New Circuits Page 85
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It is a resistance tuned oscillator covering from 35 cps (frequency unit was the cycle at this time) to 35, 000 cps in 3 ranges. The major problem with such a resistor / capacitor tuned Bridge is to obtain a constant level output over a full decade frequency....
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The automatic pump controller eliminates the need for any manual switching of pumps installed for the purpose of pumping water from a reservoir to an overhead tank (refer Fig. 1). It automatically switches on the pump when the water level in the tank falls....
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This is asimple siren sound that high power output and very noisy. ICs, Digital ICs are easy to use number CD4046 Inverter circuit and four transistor power increase current out to horn speaker 20 watt 4ohm 8ohm. Operation of the circuit when the circuit is....
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Fire Alarm Circuit using LDR (Light Depending Resistor) as ablaze sensor. It warns the user adjoin blaze accidents. It relies on the smoke that is produced in the accident of a fire. Back this smoke passes amid a LED and an LDR, the bulk of ablaze falling on....
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This is a stereo amplifier circuit which has a high output power and excellent sound quality. Amplifier circuit has a very high gain output stage resulting in the deterioration of signal noise distance. This amplifier circuit having an output power of more....
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This Mark3 version of the Infra Red extender is a special version designed to control appliances that use high frequency modulated IR remote controls....
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MIDI, the Musical Instrument Digital Interface, is a useful protocol for controlling synthesizers, sequencers, and other musical devices. MIDI devices are generally grouped in to two broad classes: controllers (i. e. devices that generate MIDI signals based....
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The Wien-bridge sine-wave oscillator uses a light bulb to stabilize its amplitude. The circuit in Fig 1 doesn`t have a light bulb; it sports several enhancements that lower its distortion and generate a test signal pure enough for testing modern op amps and....
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If you want one small lamp that flashing for general to use. I have many ways, But today you see this three of the lamp flasher circuits. Which it has....
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Here is a simple 1KHz audio distortion meter that can measure the Total Harmonic Distortion (THD) on any load at any out put power. Here you have the option to select 2, 4, 8 or 16 Ohm loads. The circuit works by filtering the 1 kHz fundamental signal using....
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The metal detector circuit consists of the fixed frequency oscillator, mixer, detector, detection oscillator and power amplifier circuit, and the circuit is shown as the chart. Fixed frequency oscillator circuit consists of ceramic filter ZC, transistor VI....
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One of the drawbacks of a three-pin voltage regulator is that the input voltage needs to be 2. 5 3 V higher than the output voltage. This makes these integrated regulators unsuitable for battery power supplies. If, for instance, the output voltage is 5 V, a....
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This is an improved IR remote control extender circuit. It has high noise immunity, is resistant to ambient and reflected light and has an increased range from remote control to the extender circuit of about 7 meters. It should work with any domestic....
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This is a very-very high power Inverter circuit which will give you very high AC power output 3000W. This inverter will convert 12 Volt DC Battery voltage into a square wave voltage of 50 cycles per second and duty cycle of 25% ..
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This tremolo effect circuit uses the XR2206 and the TCA730 IC which is designed as an electronic balance and volume regulator with frequency correction. The circuit is use full for stereo channels and it also has the ability to simulate the Lesley effect aka....
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A step-up converter followed by an LDO regulator offers better battery life than a classic SEPIC design when operating from one lithium-ion cell....
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A very simple white led driver schematic circuit can be designed using the EL7513 constant current boost regulator specially designed for driving white LEDs. It can drive 4 LEDs in series or up to 12 LEDs in parallel or series configuration and achieves....
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The old common-base audio preamp, having a noise figure of 5dB is an obvious target to improve the noise figure. A common-emitter configuration, with shunt feedback gives 50 ohms input resistance (preferred by the mixer) and a 2dB noise figure. Two....
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Here is a simple and effective circuit for driving florescent lamps from a 12 V supply. The circuit is nothing but consists of an oscillator, a MOSFET switch and a step-up transformer for driving the florescent lamp. The IC1 TLC 555 is wired as an astable....
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The circuit is two separate 3023 optoisolators driving two separate triacs, each one powering a large 3-phase contactor. One contactor is engaging fine. The other one is rattling badly because it isn`t getting full power to pull in. The top photo shows trace....
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For the transmitter schematic (part of this transceiver), see entry entitled S-W ATV Transmit-ter for 440 MHz, Fig. 5-1. The downconverter portion is shown here.This transmitter contains both a video and sound section. Five to six watts PEP on synch tips of....
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Automotive diagram for Instrument Cluster of 1987-1993 Ford Mustang (Third Generation)...
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The following circuit shows about Installing Bathroom Electrical Wiring Circuit Diagram. Features: safety, energy saving, increase your home ....
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This circuit uses the LM358 operational amplifiers (or any single supply op amp) to generate a pulse-width modulated signal. In most cases, I would just use a microcontroller to generate PWM signals. Unfortunately, the circuit was designed for a local marine....
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This is a simple JFET pierce crystal oscillator. We can use a wide frequency range of crystal using this circuit without circuit modification. Here is the....
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12V of power, and wanted to power LEDs with a forward voltage of 2V, could I only power 6 of them Would I connect the cathode of one to the anode of the next, creating a kind of serial connection Or is there a way to have each LED be it`s own loop Thank you.....
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Objective of this project are to Design a circuit of an electronic infrared communication system, develop new ideas to implement this circuit purposely, to study the circuitry and different types of components & DTMF generator, DTMF decoder, op-amp and....
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The Arduino 2009 acts as a standalone weather station. It does not display the data. It can operate independently for months. It samples the sensors until the RAM is full. The RAM samples are stored on a sector of an SD card. Eventually, a year`s weather....
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Flame, gas and smoke detector for fire alarm. You can combine this circuit with alarm circuit. The output will be the relay which switch on and switch off the alarm. The above scheme diagram is the diagram of flame detector. The circuit diagram for gas....
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The 6JS6C tube is a TV Deflection Tube, or "Sweep Tube". Although not meant for transmitting, it exhibits sufficient performance for RF operation through 30 MHz. Each tube can dissipate 30 watts of plate power. The base is a 12-pin socket. There will come a....
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Welcome to the weblog where we discuss about electronic circuits schematics, PCB design, diy kits and electronic projects diagrams. A simple DC motor controller circuit with NE555 is shown here. several DC motor speed contro l circuits are revealed here....
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The above table is useful to determine the capabilities of the MOSFETs for the various versions. However, the connectors I have used on the LED3X "c" series is not rated for such high currents on a continuous basis. The connector is technically rated for 7....
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One problem I faced when starting to tinker with my Arduino was just how was I going to go about drawing circuit diagrams for my creations. There seemed to be a huge choice of packages out there that allow you to draw a schematic diagram, some free, some....
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This is Security alarm. If somebody disconnected the wire loop The speaker will generate a sound. I have used a circuit for my land. Then when a robber enter for my land i can know it earlier. when you setup this set the wire loop at the height of 1 feet....
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The LM35 series that is used in this project is a precision centigrade temperature sensor, which has an analog output voltage. It has a range of -55 C to +150 C and an accuracy of ±0. 5 C. The output voltage is 10mV/ C. The output voltage is converted by the....
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This example shows how to read a Devantech SRFxx, an ultra-sonic range finder which communicates via the I2C synchronous serial protocol, using Arduino`s Wire Library. The I2C protocol involves using two wires to send and receive data: a serial clock pin....
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The LA7051 is a video, Audio signal processor IC for UHF band RF Modulator It performs the functions of Audio FM Modulator video clamp circuit, white clip circuit....
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the circuit diagram of a simple radio that uses one transistor and few other passive components.. Component: Diode, Capacitor, Inductor, Resistor, ....
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The Pulsed Multiple Gas (PMG) laser described in this chapter is very similar in many ways to the Home-Built Pulsed Argon and/or Krypton (Ar/Kr) Ion Laser from Scientific American. However, the developers of the PMG laser have also used it with xenon (Xe)....
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Here, S1 and S2 are normally open, push to close, press button switches. The diodes can be red or green and are there only to indicate direction. You may need to alter the TIP31 transistors depending on the motor being used. Remember, running under load....
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One approach to generating sine waves is to filter a square If a lower distortion oscillator is needed the circuit in Figure wave This leaves only the sine wave fundamental as the 2 can be used Instead of driving the tuned circuit with a output Since a....
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This project is designed for the entry level laser experimenter. The circuit allows any two computers with serial (RS-232) communication capability to communicate over 200 meters using a laser beam. A low cost transmitter only circuit is also presented here....
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The oscillator circuit which is composed of the 1MHz quartz crystal resonator and the NAND gate is as shown in the figure, the NAND gate 3 is the output buffer stage. This circuit can be used to calibrate the standard frequency. Figure 1 The 1MHz quartz....
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Matrix keypad consists of a set of buttons similar to an alphanumeric keyboard provided with keys usually marked with letters or numbers and various extra keys. Embedded systems which require user interaction must be interfaced with devices that accept user....
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What you will find in this aplication datasheet article are sections that discuss about the practical current booster circuit technique (conventional circuit using CLD, current boosting circuit technique), the analysis of booster circuit principle, the....
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This power supply can be used to obtain a regulated power output, variable right from zero to 300 volts maximum. All the devices should be mounted on heatsinks. You must havecome across many power supply circuits which are designed for supplying anywhere....
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This Hi Fi stereo preamplifier ambit is congenital with TDA1054 IC from SGS. TDA1054 is a 16-pin DIL amalgamation and integrates 2 abstracted preamp circuits. It is a low babble preamp with little or no botheration in the architecture process. The aboriginal....
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This Schmitt trigger circuit is ``emitter coupled`` and provides a simple comparator action. The 2N3069 JFET places very little loading on the measured input. Schmitt Trigger, emitter coupled, simple comparator, 2N3565, distinct hysteresis loop,...
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As a keen cyclist I am always looking for ways to be seen at night. I wanted something that was a novelty and would catch the motorists eye. So looking around at my fellow cyclists rear lights, I came up with the idea of `NITE-RIDER`. NINE extra bright LED`s....
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This class A preamplifier has been designed in a symmetrical structure. In the input differential stages we`ve used the dual transistors T1 and T2. Polarisation correction is essential because of the amplification differences and is assured with T12. P2....
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Interfacing 16x2 alphanumeric LCD module with AT89S51 microcontroler. Circuit diagram,theory and program. JHD162 lcd module pinout and commands....
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A ascends a route while Climber B stays on the ground and tracks Climber A`s progress with the laser pointer. The Redpointer then records exactly what route was followed. Here, the route recorded in Mode 1 is played back in real-time, projecting a laser....
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Servos became valuable products for any variety of plans, like robotics, automation or only remotely controlling some thing, for example model vehicle steering. They`re reasonably low-priced and also simple to have hold of, however controlling them can be a....
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Control a furnace using a 3. 3V microcontroller. The furnace operates by connecting a common 21V AC "hot" line to one of two AC "neutral" output lines: Fan and Heat. When connected they have relatively low current flow, ~100mA. I`ve had some success using a....
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A signal conditioner for pH meter probe is required to have high input impedance. The signal conditioning of the pH meter probe is done by providing a buffer....
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All of the parts in this list are generally available through Radioshack for less than $20. I highly recommend using breadboard! You`re bound to make mistakes your first time and soldering it will only make your fail worse (double fail ). I`ve compiled this....
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A Cmos 4060 Burglar Alarm Circuit This is a single zone alarm - with automatic exit, entry and siren cut-off timers. It will accommodate all the usual types of normally-closed input devices - such as magnetic-reed contacts - foi....
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This is a circuit diagram for logic probe that is based on single CMOS IC. This logic probe shows three logic condition, High, Low, and Pulsing. Ind addition, there is no LED`s will glow if the probe input is neither hi or lo (the high impedance state of....
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A SIM Card also known as Subscriber Identity Module, A SIM is a Smart Card that can store data from a cellular phone. Those data like identity, location and phone number, network authorization data, personal security keys, contact lists and stored text....
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This circuit is able to handle nine independent telephones (using a single telephone line pair) located at nine different locations, PDF Bidirectional telephone line simulator without using telephone lines, couple, test and demonstrate all types of telephone....
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This is a power amplifier circuit which built using a TDA2002 power amplifier IC module. These are replacements for the original LM383 which is no longer available. It is easy to build and has a minimum of external components. The module has both short....
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This FM transmitter circuit is small, similar to our previous single chip FM? transmitter, but this FM transmitter is monophonic. You can see in the circuit`s...
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The analog display consists of a frequency/voltage converter (IC12) and bar-graph segment drivers IC10 and IC11. R34 is the calibration adjustment and is set so that an engine rpm of 5000 to 7000 rpm lights the first LED (redline value). ..
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In this Project we have designed an embedded system which is used for tracking and positioning of any vehicle by using Global Positioning System (GPS) and Global system for mobile communication (GSM). When the request by user is sent to the number at the....
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The LWDAQ Driver (A2037) is a Long-Wire Data Acquisition ( LWDAQ ) Driver. You will find an introduction to the LWDAQ in the LWDAQ User Manual. The A2037 provides eight LWDAQ driver sockets, each of which may be connected to a LWDAQ device or a LWDAQ....
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You can save on your electricity bills by switching to alternative sources of power. The photovoltaic module or solar panel described here is capable of delivering a power of 5 watts. At full sunlight, the solar panel outputs 16. 5V. It can deliver a current....
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A model RTX-70 exciter that was originally used in the Brookdale ATV Repeater System. This page describes some the design considerations and new features possible with this new exciter, and includes schematics of the circuits designed during the exciter`s....
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More Flexibility For Low-Power Synchronous Buck Converters Modern synchronous buck converters for portable applications provide so called power-save mode operation to maintain high efficiency over the entire....
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Quad comparators, type LM339. A flyback DC converter Done. Buck converter Step-up converter Done. that would consume several comparators and maybe there would be some nice LEDs, too. Then it hit me. A VU meter, big, beautiful, professional! From that moment....
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A aerial affection ability accumulation with a continuously capricious stabilised achievement adjustable at any amount amid 0 and 30VDC. The ambit additionally incorporates an cyberbanking achievement accepted limiter that finer controls the achievement....
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The circuit diagram shows two LT1398`s from Linear Technology used to create buffered color-difference signals from RGB (red-green-blue) inputs. In this application, the R input arrives via 75 coax. It is routed to the non-inverting input of amplifier IC1a....
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This is the schematic of a simple jfet buffer from the Basic Buffers article in the AMZ Lab Notebook, with the addition of pulldown resistors at the input and output. The circuit has a high input impedance and a low output impedance suitable for driving long....
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As shown, the audio ascribe is a microphone, which uses 2 x 2N3904 as the microphone audio preamplifier. The audio/mic ascribe akin is adjustable by agency of a 5k preset / potentiometer. The ambit uses a Colpitts oscillator for abundance generation, which....
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Designing wide range variable power supply using linear regulator is easy, but suffer terrible efficiency when it should regulate 60 Volt constant source ....
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Unlike LED light, a laser`s light output is more concentrated, meaning it has a smaller and more narrow viewing angle. This means it must be directed at its source more directly in order to be picked up. Laser light is also monochromatic, meaning laser light....
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During my Digital Projects Lab, the professor recommended I find a way to include more circuit level work into my project. To fulfill this, I decided to build a nice preamplifier which wouldinclude an IR remote control to replace the one I had built....
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On a lithium-ion cell, 3. 8V/cell indicates a state-of-charge of about 50%. It must be noted that utilizing voltage as a fuel gauge function is inaccurate because cells made by different manufacturers produce a slightly different voltage profile. This is due....
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A simple triangle/squarewave generator using a common 1458 dual op-amp that can be used from very low frequencies to about 10 Khz. The time interval for one half cycle is about R*C and the outputs will supply about 10 milliamps of current. Triangle amplitude....
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The LTC1046 is a 50mA monolithic CMOS switched capacitor voltage converter. It plugs in for the ICL7660/LTC1044 in 5V applications where more output current is needed. The device is optimized to provide high current capability for input voltages of 6V or....
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T1 and T2 in the circuitform theinherent oscillator, T3 is output level. Network consists of high-pass filter (C3, C4, R6 + - R7) and low pass filter, it`s output is added to the T3 base via C6 and R8, and in the collector of T3, it willget required square....
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