New Circuits Page 105
- Page 105
-
As shown in the diagram above, it is a radio remote control dimmer circuit. The radio remote control dimmer circuit adopts micro radio transmit/receive module and light modulation ASIC. So the circuit is concise and easy to produce. It works reliably. And....
-
-
The above circuit uses RS232 for interfacing with PC. It is very simple circuit & works very well with PC. Power is drawn from usb port OR needs external supply of 5V. The value of the crystal is very critical at AT89C2051 and must be 11. 0592MHz. Here....
-
The BA1404 fm stereo modulator Ic contains all parts needed to design an simple high efficiency stereo transmitter circuit, it contains a stereo modulator that creates stereo composites signals, an FM modulator that creates FM signals and a RF amplifier. The....
-
This tutorial shows concepts for make a lamp withdual actuation. Through aparallelswitchor by relay controlled with RF Module (based on protocol of ZigBee- IEEE 802. 15. 4). The circuit one is a receiver. This circuit controls the load and have a Relay....
-
Hi Everyone out there! I am new to microcontrollers. I am using AT89C55WD to control H-Bridge (L298) which in turn drives the DC motor. Circuits for....
-
-
-
The basis of an audio mixer is an inverting summing circuit below. For real audio mixers, a single-supply voltage is seldom used. To increase dynamic range,....
-
This circuit is designed to output both a sine wave and cosine wave. This particular design uses an operational amplifier. As shown in the schematic the output frequency is set by the component values as 1Hz. The first operational amplifier outputs a 1Hz....
-
The circuit uses an IR phototransistor, Q1, to detect a remote control`s IR output signal. A PNP transistor, Q2, then amplifies Q1`s output and lights LED1. That indicates that an infrared signal has been detected by the phototransistor, or in other words,....
-
The switching power supply provides 12 volts, at 10 amps, maximum, using a discrete transistor regulator with an op-amp functioning as a comparator in the feedback circuit. With reference to the schematic, the front panel power-on light is not shown. There....
-
Here is the schematic of a simple DIY solar cell phone or USB charger circuit. This solar USB battery charger circuit can be used to charge any device, which can be charge from computer USB port. For example MP3 players, cell phone, iphone etc. The circuit....
-
-
-
-
-
-
The ambit declared actuality is that of a metal detector. The opera- tion of the ambit is based on superheterodyning assumption which is frequently acclimated in superhet receivers. The ambit utilises two RF oscillators. The frequencies of both oscillators....
-
There are at least 3 different versions of this circuit. The first DM-2 version was using the MN3005 BBD and the MN3101 Clock Driver IC (PCB marking: ET5214-510). Later they changed the clock driver to MN3102 and the BBD to the low current version of the....
-
The add-on circuit presented here is useful for stereo systems. This circuit has provision for connecting stereo outputs from four different sources/channels as inputs and only one of them is selected/connected to the output at any one time. When power....
-
I already have one project where arduino outputs audio signal to USB speakers via software 10-bits PWM. In first, I was not satisfied with quality of sound generated via PWM. There are just not enough speed in arduino engine to run PWM well. For example for....
-
One can transform an ordinary binary counter, such as a 7493, into an up/down counter with mode control by adding XOR gates 7486 to the counter`s outputs. The circuit counts up when the DN/UP line is low and down when the DN/UP line is high. To use the 7493....
-
This LAN tester circuit originally designed by Vassilis Stergiopoulos. This LAN tester circuit optionally has two designs. The first design is built based 2 main ICs that are timer IC555 and decade counter 4017. The second design is based microcontroller....
-
The Circuit consists of two 555 timer/oscillators in a dual timer configuration both setup in unstable mode. Component: 1N4148 Diode, 555 IC, ....
-
-
-
Quartz crystals have the property that their amplitude/phase characteristic repeats itself at frequencies that are an uneven multiple of the fundamental f....
-
The circuit was designed to produce a preamplifier with symmetrical audio input while the output operates in Class A type. Preamplifier (pre-amp) a devi....
-
The continuity tester is a handy adjunct to an ohmmeter. The unit or component whose continuity is to be checked is connected between terminals E1 and E2....
-
The PR4403 is an enhanced cousin of the PR4402 40mA LED driver. It has an extra input called LS which can be taken low to turn the LED on. This makes it very easy to build an automatic LED lamp using a rechargeable battery and a solar module. The LS input is....
-
Following in the footsteps of the "primitive" but quite successful 4 pin OM802 timer IC manufactured by the original SIGNETICS ITT - GEMINI chip fabrication plants way back in 1969 / 1970, a new and very innovative I. C. known as the " NE-555 " timer I. C.....
-
Here`s how to build your own adjustable power supply based on LM317. The IC LM317 is so versatile that an almost unlimited number of different, small, high grade power supply circuits can be built using it. The configurations can be introduced for different....
-
If you`ve got a Squeezebox then you`ve probably got an amplifer to go with it. Having to get up and turn the amp on and off when you need it is just far too tedious (especially if your Squeezebox is hidden away in a cupboard or something), so we need a....
-
unbalance pre amp single supply. The use of a single power supply requires the presence of a voltage equal to the voltage divided by two. This half-voltage is created by the resistors R9 and R10 connected in voltage divider bridge. ..
-
You can see that circuit is complete and bulb is ON. Suppose you want to OFF bulb from the upper switch at top of stair, simply Switch OFF the switch then circuit will break and the bulb will be OFF. You can switch ON the bulb again to switch ON this Switch.....
-
Remote controlled light switches are becoming more and more common. DIY stores have inexpensive sets consisting of several light switches and a remote control unit. It`s then easy to control everything from your armchair. But how can you control the lighting....
-
Using the LM3410 constant current LED driver is a monolithic IC we can design, many high efficiency and low cost lights, using just few electronic components. The LM3410 utilizes current-mode control and internal compensation to provide high-performance over....
-
DMRC`s uniqueness lies in how it has managed soft issues related to the general public affected by it. To ease out traffic snarls and general chaos around construction sites on main roads, DMRC deployed special personnel to assist Delhi Police. Cars....
-
Balanced signal consist of two lines that have opposite phases, and should be received with differential input receiver. Balanced signal is employed in many....
-
Here is a very simple circuit that can be used for testing Zener diodes. The IC1 NE555 is wired as an astable multivibrator and the output of the IC is stepped up to a high voltage AC using the transformer T1. The unloaded AC voltage will be around 120V. The....
-
Here we are going to discuss about a simple timer IC 555 project. The 555 timer IC can be used as an audio amplifierwithastable multivibrator configuration. It functions as to carry outpulse width modulation (PWM) of audio signal. Current(I) capacity of 555....
-
The IR Theremin hardware schematic is deliciously simple in that the main input and output devices do not require many connections. This is usually a mixed blessing because less hardware, often means more software. The main devices used in the circuit are....
-
Here are some 3V to 9V DC converter circuits that were requested by some of our visitors. It may be helpful to have one of this converters when no 9V battery is available or if you consider that they are too expensive. The first circuit is very simple, it....
-
A simple method of charging a battery from a higher voltage battery is shown in the circuit below to the left. Only one resistor is needed to set the desired charging current and is calculated by dividing the difference in battery voltages by the charge....
-
Depending on its design an electric guitar may have anything from one to six pickup elements. Classic (acoustic) guitars could also benefit from one or mo....
-
The shortcoming of the inductive ballast is that volume and weight are larger, one`s own power consumption is great, there are noises. The electronic ballast has low-voltage starter, non-stroboscopic, has no noise, energy-efficient, immediate advantage in....
-
This is a circuit for voice transmitter using a pair of BC548 transistors in this circuit. Although not strictly RF transistors, they still give good results. I have used an ECM Mic insert from Maplin Electronics, order code FS43W. It is a two terminal ECM,....
-
This amplifier has Output power about 500 Watt with the compatible voltage supply is under 63 Volt or same. If this amplifier operated the transistor output recomended to be place on the good heatsink. Because, the transistor will be hot. Transistor Ouput....
-
Here`s a project that could be useful this summer on the beach, to stop anyone touching your things left on your beach towel while you`ve gone swimming; you might equally well use it at the office or workshop when you go back to work. In a very small space,....
-
History of Nikola Tesla and Tesla Coils, how a tesla coil works, and an example of a homemade TC. The homemade diy tesla coil is battery operated, and has a gas plasma discharge terminal., Arcs can be made to resemble a double helix. High voltage capacitors,....
-
It`s a single integrated circuit with EEPROM, Ram, Analog to Digital converter, a lot of digital input and output lines, timers, UART for RS 232 communication and many other things. The best is however that a complete programming environment is available....
-
I was excited when I found VRbot - a voice recognition module, that has several interesting functions such as Without hesitation, I bought one of the module for my experiment. The module size is about 1" x 1 3/4". The company provides a free download GUI....
-
Most homes today have at least a few infrared remote controls, whether they be for the television, the video recorder, the stereo, etc. Despite that fact, who among us has not cursed the light that remained lit after we just sat down in a comfortable chair....
-
Here is 6 zone alarm independent circuit. this circuit suitable for a small office or home environment, it can also be adapted to use a combination lock or keypad to set and reset the alarm. All zones Z1 to Z6 use normally closed alarm contacts. Zone 1 is a....
-
The schematic is very simple for this tutorial. It is just a matter of wiring up the ADXL320 sensor to the PIC and the LED. The power circuitry assumes you have a battery of +5v to power the PIC. You can create your own custom circuitry for this or just use....
-
Yes, it does charge the inductor again. Diodes are a good that they will not charge the inductor back but of course dissipate fair amount of instantaneous power due to the forward voltage drop. One way would be to monitor the current and stop driving those....
-
This stereo FM wireless microphone also makes a great quality audio link. We tested it to beyond 50 meters and it was rock solid. It s certainly not the first wireless microphone we ve ever published but this one is a little different. It s stereo, providing....
-
This is a simple SCR based burglar alarm circuit. Its features include automatic Exit and Entry delays - together with a timed Bell cut-off and Reset. It`s designed to be used with the usual types of normally-closed input devices such as - magnetic-reed....
-
Starting from a 30 volt power supply this high voltage converter circuit can deliver a voltage between 0 to 3 kV (version 1) or from 0 to 10 kV (version 2)....
-
Small and interesting circuit that flashes your head lights. Automotive, head lights, circuit diagram. Built around famous NE555 timer circuit....
-
-
A low frequency test oscillator for testing tone controls and experimenting....
-
Used this circuit once to track down the location of a plastic pipe, buried underground. It transmits a weak RF signal, which can be picked up by a portable AM radio from about 6 feet away...
-
Economy radar detector Circuit diagram This circuit uses a 1458 dual op-amp to form a radar detector. C1 is the detector of the radar signal. The first op-amp forms a current-to-voltage converter and the second op-amp buffers the output to....
-
-
This is a complete alarm system with 5 independent zones suitable for a small office or home environment. It uses just 3 CMOS IC`s and features a timed entry / exit zone, 4 immediate zones and a panic button. There are indicators for each zone a "system....
-
This LED lamp was originally designed for use on a budget solar-charged 12V electrical system. It is bright enough for comfortable reading at night and fe....
-
In order to solve the lag and light transition phenomena, it can use the Triac dimming light circuit shown in the figure with dual time constant. The circuit increases R3, C2 resistor-capacitor network, and the reducing charge on capacitor C1 can get....
-
-
This Blog show the Different Electronics Circuit Design, Application, Fields and Resources which could help students, engineers, professionals, and common people whose interest is in electronics! For your comments, suggestions, or your looking for a circuit....
-
The Fluke interface diagram is an example of a typical microcontroller circuit. There is not really much to see, apart from the microcontroller itself. Nevertheless I`ll try to explain what`s happening here, because not everything is as obvious as it may....
-
This microphone preamp schematic electronic circuit project is designed using the OP37 operational amplifier manufactured by Analog Devices and is effective, fixed-gain transformerless microphone preamp which amplifies differential signals from low impedance....
-
Excess electrical energy has been discovered in spark gaps using Carbon/Graphite - Thoriated Tungsten rods with a Coefficient of Performance (COP) greater than 100% across the gap. A Wimshurst Generator is used as a primary high-voltage dynamo. A Tesla-like....
-
-
This project consists of a small, portable DJ mixer powered by a 9V dc external supply adaptor or from a 9V PP3 battery. The mixer features two stereo phono inputs and two stereo line-level inputs and has one stereo mixing channel. A microphone input and a....
-
BattMan II is a computer controlled battery manager, intended for typical rechargeable batteries used by R/C and electronics hobbyists, as well as various consumer product batteries. BattMan II has the following capabilities: Works with Nickel-Cadmium....
-
What is mean logic-1 or logic-0 Logic-1 and logic-0 strongly connection between the state at one moment and one condition. Logic-1 means any states are in the condition of high voltage close to Vcc voltage, and logic-0 means any states that close to netral....
-
A preamplifier circuit suitable for high impedance type electric guitar pickups is given here. The circuit is based on a uA 741 op-amp (IC1). The IC1 is wired as a non-inverting amplifier. The POT R1 can be used as a volume controller. The POT R6 can be used....
-
-
The circuit presented here illustrates the fact that in spite of all kinds of new component and technology, it is still possible to design useful, and interesting, circuits. The circuit is based on two well-established transistors, a Type BF256C and a BF494.....
-
This TDA1514 audio amplifier circuit design electronic project is capable to provide a high audio power output using a specialized audio IC and other few common components. The TDA1514 audio IC is manufactured by Philips Semiconductor and is capable to....
-
This is the circuit diagram of UHF band TV antenna booster with 15dB gain power. This low cost antenna booster is simple and easy to build. This circuit formed based on BF180 UHF Transistor. The first stage is an band pass filter constructe....
-
-
This handy circuit can be used as a speed controller for a 12V motor rated up to 5A (continuous) or as a dimmer for a 12V halogen or standard incandescent....
-
A compact and portable 12V Solar power inverter circuit that will keep away darkness. This tried and tested design converts 12V DC from the storage battery...
-
Make a 0-25 mA current limiter. I want to take a control voltage of 0-5 V as input and have it control a current of 0-25 mA through a restive load (the restive load may vary between 0-200, it`s represented as R2 below). The O2 op-amp is used to make a....
-
-
Diodes with a low voltage drop, also have a high reverse current (leaking current), this will load the detector circuit heavier, the Q of the detector circuit reduces, and with that also the voltage across the LC circuit. At a lower input voltage the diode....
-
Normally we often encountered the frequency meter can be used in speed sensor, tachometer, measurement or signal recurring. This frequency to voltage converter (FVC) can be used to change the voltage into a digital or analog tachometer. Circuit that consists....
-
The ADUC812 MicroConverter is a fully integrated 12-bit data acquisition system-on-a-chip. Like all of ADI`s MicroConverter products, it features precision A/D & D/A conversion and a Flash Microcontroller on a single chip. ..
-
NJM2274AR is a sub package of NJM2274A, If you need see the description, please click NJM2274A. If you need NJM2274AR`s datasheet, please download it from below. By New Japan Radio Co. , Ltd ..
-
This article is of interest only to readers whose bicycle lights are powered by a dynamo. The laws on bicycle lights in the United Kingdom are stricter th....
-
The long exposure modified TouCam Pro II camera may show signs of unacceptable noise in the pictures for exposures of over 30s or so. In order to combat this effect the CCD chip may be cooled. The cooling device I used was a Peltier module. A second hand....
-
Here is a high performance RF amplifier for the entire VHF broadcast and PMR band (100-175 MHz) which can be successfully built without any special test equipment. The grounded-gate configuration is inherently stable without any neutralization if appropriate....
-
This circuit will power a 6 inch 4 Watt fluorescent tube off a 12 volt supply, consuming 300 mA...
-
This circuit turns-off an amplifier or any other device when a low level audio signal fed to its input is absent for 15 minutes at least. Pushing P1 the device is switched-on feeding any appliance connected to SK1. Input audio signal is boosted and squared....
-
Before you can design an adjustable voltage regulator into your circuit, or do a redesign, you need to calculate the values for two resistors. This is not difficult in itself, but actually finding the right resistors may pose problems. Fortunately a trick is....
-
I own a 2005 McGregor 26 sailboat. I had a Standard Horizon CP150C installed in my boat. I recently moved my boat to British Columbia, Canada and to my surprise my GPS unit did not power on. Although it is an old model it is brand new. I am the original....
-
-
An interesting DC/DC converter IC is available from Linear Technology. The LT1615 step-up switching voltage regulator can generate an output voltage of up to +34V from a +1. 2 to +15V supply, using only a few external components. The tiny 5-pin SOT23 package....
-
This circuit measures the distance covered during a walk. Hardware is located in a small box slipped in pants` pocket and the display is conceived in the following manner: the leftmost display D2 (the most significant digit) shows 0 to 9 Km. and its dot is....
-
An Internet connection would be a valuable addition to many projects, but often designers are put off by the complexities involved. The NetWorker`, which consists of a small printed circuit board, a free software library and a ready-to-use....