New Circuits Page 161
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As it is well known, according to power saving regulations, we need to obtain a very low power consumption during standby condition for all equipment continuously powered on the mains. For not saving version of power supply, the standby power consumption....
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Build your own simple power failure alarm monitoring system using a AC Relay that will trigger off a buzzer when the mains power supply cuts off ..
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The following circuit shows a C209A IC for metal detector circuit diagram. Features: 100uH as a sensor, oscillator circuit, Inductor determines ....
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Works but the windows go slow, you hook 12 volts directly to the motors and they zip up fine. I saw a post from several years ago where someone was trying to use the common 5 pin ice cube relay. never saw anything that said it worked. Anybody know the power....
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For several years now, a rear fog lamp has been mandatory for trailers and caravans in order to improve visibility under foggy conditions. When this fog lamp is switched on, the fog lamp of the pulling vehicle must be switched of to avoid irritating....
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ICL7135 Typical Application Schematic Diagram appears in the following circuit illustration. This A/D (Analog to Digital) converter with all necessary active devices are contained on a single CMOS IC such multiplexed BCD output and digit drivers..
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These two circuits make a LED fade on and off. The first circuit charges a 100u and the transistor amplifies the current entering the 100u and delivers 100 times this value to the LED via the collector-emitter pins. The circuit needs 9v for operation since....
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The use of optical filters to reduce/remove light from other sources. If a fairly narrowband optical filter were used on the receiver, "off-wavelength" light could be rejected - but such filters are quite expensive, they can be difficult to implement on a....
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This simple AVR Programmer able to transfer hex programs to most ATMEL AVR microcontrollers. It is more reliable than most other simple AVR programmers available out there and can be built in very short amount of time. This Programmer support the AVR....
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A N2PK VNA that it would be useful for antenna measurements and wanted to run it with a laptop PC. As most newer laptops do not have a parallel port on them I decided to explore running it off the USB port. USB has its attractions when it works properly and....
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The 4 data lines from the Keypad Interface go straight into the data inputs of the Holtek 9200B DTMF Generator (pins 6, 7, 8 & 9), and the Inverted Chip Enable output on the Keypad Interface goes into the Chip Enable Input on the Holtek 9200B DTMF Generator....
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The power Amplifier hi-fi OCL 120W rms sizes really, if use power supply circuit at enough good and use 8ohm size prominent point interesting loudspeakers. Of the circuit be use the transistor entirely have no the integrated circuit mixes. Then make bland....
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This is an infrared transmitter circuit of the signal is small and using a power supply of 1. 5 V only. by the main electronics are the two LM3909 (oscillator IC LED Flasher) Normally, we tend to put it to work as a simple flashing light circuit. Use a....
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Instead of the 555 timer IC we have two transistors back to back acting as a multivibrator. This "chops" the direct current enough so it can travel across the magnetic field of the transformer. This is probably the simplest and easiest stun gun to make. It....
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The light barrier described here can be used to guard an entrance. You can use it to signal of someone is walking through the corridor, or to check if the car has been parked far enough in the garage to be able to close the door. The circuit consists of a....
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The Fuel and Temperature gauges as used in the 1960 - 1965 Ford Falcon are very basic instruments whose operating principles seem to have gotten lost in this modern day era of digital electronics. In order to properly troubleshoot the circuits you will need....
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This circuit shows a simple 4-digit frequency counter using an ICM7217 and an ICM7207 (which provides the 1-s gating window and the STORE and RESET signals). The display reads hertz directly, as connected. With pin 11 of the ICM7027 connected to VDD, the....
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The I2C (Inter-IC) bus is a bi-directional two-wire serial bus that provides a communication link between integrated circuits (ICs). I2C is a synchronous protocol that allows a master device to initiate communication with a slave device. Data is exchanged....
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Describes reading a thermistor using an Atmel ATtiny45 or ATMega168 microcontroller to drive two fans to cool a PC installed in a kitchen cabinet. Include a table for converting the BC1482 resistance to Fahrenheit....
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Most Tesla coils designed for educational and experimental purposes use line-operated, step-up transformer-in setups like that shown in Fig. 1 -to generate the high voltage needed for the coil`s primary circuit. While there`s nothing technically wrong with....
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Originally Posted by kalena555 Dear Mark, The bit of info of getting the motor to run without the tubes is new info to me. So much learn XD. Well now....
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The objective of the project is the design of an imager chip for laser-scanned 3-D depth/range finding. The project is divided into two modules: Pixel Array/Centroid Detection and Analog-to-Digital Conversion (ADC). The pixel array/centroid detector tracks....
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Solar charge controller is an electronic device which is used in solar system installation to control the amount of charge going towards the battery from solar panel. Charge Controller are available in different types and ratings. The term "charge....
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I want the final package to be as invisible as possible, and without any wires / adapters / etc. Obviously that requires me to run this project from a small battery. To preserve power, I`m thinking about putting the ATMega (eventually probably the ATTiny)....
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This transmitter sends an FM signal in the 88-to 108-MHz range, with a tone of 19 kHz. This can be used to activate the FM MPX pilot carrier indicator, which can be interfaced to external devices. L4 is for use with a 15 CM wire antenna. L1 is 9 turns of #26....
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The Open Source Automation project is free automation software that runs on Windows and requires no programming to setup. It has a nice graphical interface and has unique features that high-end security and automation systems do not. OSA is still in early....
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The basic problem for me is that gates on a logic circuit appear to be creating power from nothing, which is impossible. For example imagine two NOT gates connected in sequence: To my uninitiated mind what seems to be happening is that the first NOT gate....
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The telemetric physiologic monitors transmit measurements of bodily functions from beneath the skin of a live animal to a receiver beneath the animal`s cage. The smallest transmitters the company makes, are their " mouse " transmitters. These were of....
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Altogether it will cost about US$ 10 and much room on my circuit board. The design is really great but i don`t have to room for it and i like to spend less. You can drop all off the transistors and resistors if your motors don`t drain too much current. You....
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Lead acid batteries often fail prematurely due to over-charging, under-charging, deep discharging and low electrolyte level. All of these can lead to sulphation of the plates which leads to high internal resistance and eventual failure. Normally, this....
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Today, simplicity and minimum controls is required for design of a handheld device. It will be very useful if a circuit allow us to turn the power on or of....
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This tour, available in Stainless DIL 8 legs, can measure 4 analog voltage independent between 0 and 5 volts, and send the result of this measure in the form of four characters on a standard asynchronous serial link. Its serial output is di....
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The following circuit shows a Radio Remote Control Circuit Diagram. This circuit based on the? UM91214B IC. Features: use of DTMF (dual-tone ...
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LM311 is a comparator, It operates from single 5V supply or dual supplies, input current 150 nA, 50 V-50 mA output drive capability. TTL-CMOS compatible output. The Output is open collector so it can sink current but cannot source, a totem pole output can....
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The figure shows the schematic of the circuit. A number of unique features give this design its trouble-free performance. The tendency for regenerative receivers to radiate oscillator-frequency signals is eliminated here by placing a transistor buffer Q1....
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This simple ""heat sensing circuit"" acts as a warning device whenever the temperature exceeds the preset level in its vicinity. It is an ideal circuit to monitor the heat generating devices like PC, Inverter etc ..
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aquarium design, dpdt relay, 12v inverter: ONE: The relay you have selected is rated plenty sufficient for a 400 watt load. TWO: The 12v dc relay, transformer and diodes are using very little power so efficiency is of little concern. THREE: How are you....
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This project is based on ISD2560P IC which allows you to record 60 seconds voice and then playback it with very high quality. As shown in the schematic, the input soruce is an electret microphone. If a dynamic microphone is used, R2, R3, R4 resistors and C3,....
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This is the circuit diagram of a 3A adjustable power supply using IC LM350K. LM350K is a very rugged voltage regulator IC with features like thermal regulation, short circuit protection etc. This circuit is designed as per the application notes in the data....
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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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The schematic shown here is a project of a simple temperature sensor circuit or we can also say it a heat sensor circuit, which will activate an LED when receive heat. The circuit is easy to make and using only few components. The two BC547B transistors are....
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The Part of 2000 Chevrolet Chevy Blazer Wiring Diagram: power distribution schematic, fuel pump relay control, fuel pump and sender, splice pack, fuel pump prime connector, ground distribution svhematic, underhood fuse block, vehicle control module, fuel....
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These versions are the original UV-3R, the UV-100, UV-100 MKII, UV-200, UV-200 MKII, UV-3R MKII, UV-3R+, UV-5R, and the UV-5R Plus. KYD (China New Century (Quanzhou) Communication Electronics Co. , Ltd) also sell a version of the UV-100, UV-200, UV-300,....
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In this fire alarm circuit project, a thermistor works as the heat sensor. When temperature increases, its resistance decreases, and vice versa. At normal....
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Here`s BH1417 USB FM Transmitter with built-in PLL circuit. Its low-frequency signal is converted into high-frequency, which can take any audio device with FM radio (stereo, car CD, MP3, DVD player, etc.), as a normal radio station. Transmitter power is....
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A step by step guide about how ATX power supply works with an example of a 200 Watt PC Power Supply function....
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This plugin consists of a single 555 Astable. This plugin is very versatile, and can be used for any number of things, but it often is used to give a clock to run a circuit. The plugin below gives a pulse of about 2Hz with a very low mark-space ratio. The....
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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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Going camping nowadays involves taking lots of electronic equipment whether for day to day running or for fun and entertainment. Most of the time a charged lead acid battery and a power inverter would be used to ensure a smoothly organized holiday where....
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Here is the circuit diagram of a simple 3 channel audio splitter based on the IC NE5532. NE5532 is a dual internally compensated low noise opamp from Fairchild semiconductors. It has a high small signal and power bandwidth, making it well suitable for high....
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This circuit was designed for use in a hifi showroom, where a choice of speakers could be connected to a stereo amplifier for comparative purposes. It cou....
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All the capacitors are there to just block DC, but how important are the capacitance values and how does one determine the value of Co. Rin represents the source resistance it`s not actually part of the amplifier circuit however, it does interact with the....
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Four button RF remote is used to turn ON / OFF four different devices independently. Any of the four outputs can be configured to work independently in either toggle or momentary mode. Outputs are buffered by BC549 NPN transistors and can drive low voltage....
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This is the schematic of a simple 40W, 12 to 220 V inverter. You don`t believe, this is simple and cheap and working for me for last 4 years. The heart of the circuit is a CD 4047 IC which is wired as an astable multi vibrator here. Resistance and....
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Many applications require low-frequency signal generators that can deliver high-performance, high-resolution signals. This Design Idea presents a circuit that generates frequencies of 0 to 1 MHz. Sinusoidal, triangular, and square-wave outputs are available.....
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Using circuit below, we can animate the bike turning signal using LED. The bike turning signal will blink from the right side (D1) to the left side (D5) in a....
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It uses a 555 timer wired as an astable oscillator and powered by the emitter current of the BC109C. Under dry conditions, the transistor will have no bias current and be fully off. As the probes get wet, a small current flows between base and emitter and....
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This shadow alarm circuit can sense a moving shadow in a confined area. It can be used to protect things from theft. When somebody approaches the unit, it will give a loud alarm to abort the attempt of theft. The circuit uses the light sensing property of....
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The basic circuit illuminates up to ten LEDs in sequence, following the rhythm of music or speech picked-up by a small microphone. The expanded version can drive up to ten strips, formed by up to five LEDs each, at 9V supply. IC1A amplifies about 100 times....
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What follows below is the schematic of Flashlight Finder circuit diagram using the LM3909, a monolithic oscillator designed to flash Light Emitting Diodes (LEDs)..
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This circuit shows about 7806IC For Automatic Battery Charger Circuit DIagram . Features: designed for a car battery (about 40 Ah rating), used ....
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A simple and high quality FM transmitter circuit designed based on the BA1404 IC .This FM transmitter circuit can be operated from a 3 V battery....
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Here is a simple frequency counter designed to monitor the 240VAC mains supply. It as a frequency range of 0-999Hz, so it could also be used with 400Hz equipment. Standard TTL/CMOS logic is employed for the counters and display drivers, while an ELM446 (IC1)....
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This page contains tesla coil measurements using signal generators, frequency counters, oscilloscope etc....
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The TDA9302H is a monolithic integrated circuit in HEPTAWATTTM package. This is a high efficiency power amplifier for direct drive vertical rolls from the yokes of TV. This is intended to be used in Color and B & W television as well as in monitors and....
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Here is the circuit for the FM Bug. In total there are 18 core components that are needed for the fm transmitter to work properly. The far left side has the electret microphone and then things move electrically to the right until they hit the antenna. Don`t....
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The AT90S1200 RISC Microprocessor (AVR family) is a very neat component to program a PLL synthesizer or for doing other rather trivial tasks in a radio circuit. It is reasonably cheap, easy to program and a nice integrated development environment is....
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Power Diagram Videos DIY Solar Panel System Wiring Diagram. This is an exact diagram how Power Window Wiring Diagram 1 Amazon Printed Books Power Door Locks & Wiring Diagram Amazon Printed Books....
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hi, I have 2 stepper motors to be controlled by dspic. I have programmed the pic. Im confused in usng L298 s. Can someone help me with a circuit....
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I designed the simplest remote-controlled autocue system possible with materials that i unburied from my old-and-busted bin, my old P4 laptop, a totally broken USB keyboard, a piece of plexiglass. A foot-switch controls the scrolling of the text in the....
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With a few resistors, LEDs and using a LM3914 bar/dot display driver IC we can construct a simple 5V Voltmeter Monitor Circuit which provides TTL-compatible undervoltage and overvoltage warning signals. A complete circuit can be shown in the schematic below..
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This is a design circuit for an electrostatic transducer for ultrasonic measurement circuit. This circuit uses the LM1812 ultrasonic transceiver. Transducer x1 and LM1812 will transmit a burst of oscillations. Then the return echo is listened by using X1.....
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Use this cell phone charger circuit and a 1.5V battery when you do not have main power and need to charge your phone ..
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In this instructable I`ll show you how to build a detachable solar panel and battery charger for your backpack. This can power or charge all your gadg....
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Here is a crude but efficient tricky charger for Lead Acid Battery. It uses a 12 volt car bulb as current regulator and charge status indicator. The bright....
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The circuit was designed to create an electronic siren to provide a scheme for producing an alert sound in emergency cases or any circumstances that requires its usage. 4011 a quad 2-input NAND gate integrated circuit, generally characterized by small....
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The wein bridge osillator employs as balanced wein bridge as the feedback network. Two stage common source amplifier provide 360 degree phase shift to the signal. The attenuation of the bridge is calculated to be 1/3 at resonant frequency. There for the....
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This application note provides insight into how synchronize multiple multiplext high-speed DACs in transmitter applications....
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Here you will find a interesting collection from frequency dividers with division factor from 2 until 10. All the choices they are based in the 7490 that are a Decade and Binary Counter....
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Now the camera mount is very sturdy, and I went a year without using one a tether, but if you like to ski through the woods filled with deep powder, let me tell you: a safety strap is a good idea. It`s made from a 12" toy dog collar! All you do is slide the....