Top Circuits Page 97
- Page 97
-
The circuit is bell timer. This new project uses AT89S52 microcontroller and I2C EEPROM to store the alarm timings. Also the 7segment display is replaced with LCD display. DS1307 is used for Real time clock. The user can store upto 25 bell timings and they....
-
-
This benchpower supplyfeatures three solid-state DC power supplies. The first supply gives a 1. 5 to 15 volts at 1 ampere. The second supply gives a -1. 5 to -15 volts at 1 ampere. The third has a fixed 5V at 3 amperes. All DC supplies are fully regulated. A....
-
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 tha...
-
Present roads in good condition than the former Pan. The traffic is convenient. But often ran high speeds. When we use the bicycle at night. Although the...
-
The dual outputs of the LTC6103 can be used individually to provide overload detection, and/or may be taken as a differential pair to provide a bidirectional signal to an analog-to-digital converter (ADC) for example. Figure 3 shows a typical circuit for a....
-
This is a circuit of board system monitoring for temperature and voltage condition. It uses the NE1617A. The NE1617A is a 2 channel temperature sensor. It can...
-
-
Here is abooster antennacircuit for 550Khz to 1650Khz. to amplify the input from a telescopic antenna. cover the medium waveband from about 550Khz to 1650Khz. To drive low impedance (50 ohm) receivers, the medium output impedance of the BF981 stage is....
-
The 555 on the right is wired as an alarm sound generator and the second 555 timer on the left is a 1 Hz astable multivibrator. The output of the left timer is to modulate the frequency of the right timer. This process will cause the right timers frequency....
-
Bubba oscillator is another example of phase shift oscillator. The Bubba oscillator takes the advantage of quad op-amp package to get 45 degree phase shift for...
-
A very efficient buck boost converter circuit is shown here. The circuit is based on the LTC3440 buck boost regulator IC from Linear Technology. The LTC3440 requires only one inductor and provides up to 96% efficiency. There is no need of Schottky diode for....
-
how to build own RIFD, use one Microcontroller we can build it. This schematics is Very Simple..
-
-
CXA1019 FM RADIO CXA1019 is a one-chip FM/AM radio IC designed for radio-cassette tape recorders and headphone tape recorders, and CXA1019S has the...
-
cable LAN tester circuit can also to test cable on telephone, coaxial cable, Lan cable and other. this circuit using led for main indicator device..
-
Here is camera switch circuit. This circuit can be used for multiple cameras with one monitor. The circuit can be operated manually or automatically. When operated automatically the switch will be connected to the output of 555 astable multivibrator that....
-
Speaker relay delay controlling circuit for audio amplidier..
-
This capacitance meter circuit is similar with previous meter circuit, but it uses transistors rather than logic gates. Here is the schematic diagram: You...
-
Capacitance meter is one instrument that you should have in your toolbox if you are an electronics hobbyist, or if you`re a professional electronic technician ...
-
The frequency formula of 555 oscillator is popularly known. For a known resistors and capacitor, the frequency can be determined by a formula. From the math...
-
This alarm circuit is an anti- theft wireless alarm can be used with any vehicle having 6- to 12-volt DC supply system. The mini VHF FM radio-controlled, FM transmitter is fitted in the vehicle at night when it is parked in the car porch or car park. The....
-
First, to indicate that the head lights (or the side lights) should be switched off after switching off the ignition contact. With this circuit, there should be no dead battery due to headlights that were left on. ..
-
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....
-
When the battery voltage is 11. 5V or less transistor Q1 is turned on and the LED D1 will be bright. When the battery voltage is between 11. 5 and 13. 5 V, the transistor Q2 is turned on and the LED D2 will light up. When the battery voltage is 13. 5V....
-
The schematic diagram come from circuit: Car Lamp Charger power supply. Go to that page to read the explanation about above power supply related circuit diagram. Scheme of the Car lamp charger is shown in above. A distinctive feature of the scheme is that....
-
A circuit schemes basic heavy-duty electrical system which connecting components such battery, starting motor, alternator, magnetic switch, ignition switch, and connected wiring..
-
This is the simple and easy way to tap current from a Motor Bike battery to charge the Mobile Phone. Most of the Mobile Phone battery pack has three 1.2 vo...
-
Cellular phone detector circuit schematic using common electronic parts..
-
This easy as well as cheap but effective device is mainly intended for your ease to leave your fish autofed. You need no longer worry your fish would starve as this autofeeder would replace your job. This autofeeder device will expell pellets byquantityas....
-
Even though today`s electrical appliances are increasingly often self-powered, especially the portable ones you carry around when camping or holidaying in summer, you do still sometimes need a source of 230 V AC - and while we`re about it, why not at a....
-
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...
-
Circuit-delay relay circuit speakers is useful as a delaying / delay on the speaker that functions as a deterrent to prevent pounding of the very first amplifier is turned on. This aims to avoid memperawet speakers easily damaged. The following is a....
-
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 following circuit show about Circuit Diagram Of Motor Control Unit. This circuit based on the LM317 IC. Features:diodes protect the regulator, ...
-
The following circuit shows about Slave Flash Light Control Circuit Diagram. Features: 68mH Inductor, give auto trigger for secondary flash light, ...
-
useful to make a constant speed motor control. Which means the speed will stay constant despite of load and electric voltage change. Component: ...
-
This is Easy and Mini Timer Circuit ( Egg Timer) by IC 555. Alarm by Buzzer. This be mini timer circuit that interesting. I calls that Circuit Egg Timer. By...
-
This is circuit of Clap Triggered Switch. When the circuit detects tap, or short whistle or a clap, this circuit will toggle the LEDs. 33k and 5K6 charge The...
-
Discrete Class AB Transistor Audio Power Amplifier Circuit Diagram This is a class AB transistor power amplifier. It is a simple amplifier to...
-
This is a circuit of Closed-Loop Automatic Power Control for RF Applications. The circuit uses a log detector (AD8318) and a VGA (ADL5330). This circuit has a...
-
Closed Loop Motor Control Closed loop (servo) control is used to make a constant speed motor control. Constant speed means that the speed of the motor will be...
-
This is a 2 MHz crystal circuit using CMOS pair. This circuit is ideal for uses in digital watches and clock because this circuit has low power drain. The oscillator in this circuit is built by connecting the One CMOS transistor pair from CA3600E array with....
-
Why measure the temperature of the coffee? Well, coffee taste depends on two things. First, how strong the coffee is and second, how hot it is. The second...
-
Colour TV Camera Tutorial - Block Diagrams - Electronics Circuit and Tutorials - Hobby Science Projects - Modulation enables low frequency audio signals to be radiated long distances. This is done by superimposing the low frequency audio signal on the high....
-
The NE5539 wideband op amp is easily adapted for use as a color video amplifier. The gain varies less than 0.5% Irom the bottom to the top of the staitVlse. The maximum differential phase is approximately 0.1. The amplifier circuit was optimized for a 75-ohm....
-
This circuit is a stable frequency counter accurate to 5 significant digits. The range is 0 - 30MHz with an input sensitivity of greater then 100mV. The probe connects to the PC serial port. So by using the crystal oscillator already present on your PC....
-
Even power device is made to provide energy to some pc. It really is usually devised for converting alternating electric current, (AC), in order to low attention household power, (DC). Without having this bit of equipment, the pc is simply package of....
-
So you`ve read about my Computerized Room or have seen those nifty home automation products advertised in the back of electronics magazines Or perhaps someone you know has done something similar. At any rate, you have decided to try it yourself. The first....
-
I found this circuit really simple and interesting. It is really simple to drive Nokia 3310 graphical LCD by using simple LPT cable and some PC software. Firs of all connect graphical LCD to LPT port according to following circuit: Graphical display needs....
-
This constant current constant voltage SMPS can be used to efficiently charge a battery. This circuit gives 7. 2V at constant voltage mode, and 600 mA at constant current mode. Here is the schematic diagram of the circuit: The mechanism is simple, when the....
-
This is a Constant Current Source LED Driver, When the LED driver Upper-NPN is driven by a voltage thru 4. 7K the LED lights up. Assume that the Lower-NPN at bottom is absent. The current via LED and NPN is limited by R. 20mA may be ok 15mA even better. Or....
-
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..
-
LED displays are nothing more than sets of Light Emitting Diodes. The difference is that they have different shapes in order to display specific information. So driving LED displays is the same as regular LEDs. This is simple connection when there are enough....
-
In general there are two ways to control DC motor speed: by varying supply voltage and pulse width modulation (PWM). First control method is not convenient especially in digital systems. It requires analog circuitry and so on. Second motor speed control....
-
This is the simple digital counter circuit, the IC application number 4029 from binary data, and then sent to the IC number 4513, a driver IC 7 Segment, to show...
-
Here is an interesting hobby circuit of a crank door bell! The circuit is built around a timer 555 and a musical piezo-buzzer. The circuit works off 9 volt battery supply. One 9volt PP3/6F22 compact battery is enough for powering the whole gadget. Timer IC....
-
74HCU04 is a chip that was made for this purpose, HCT may not work for such a circuit. C1 and C2 can go to upto 33pF and R2 can be increased to make R2 * C2 = t. The circuit above is a parallel resonant oscillator circuit. The Crystal works by the....
-
Crystal oscillator circuitis a simple oscillator circuit when we look at the schematic diagram. A crystal oscillator circuit is nothing but a replacement of an ordinary oscillator network, which is a combination of LC. This simplicity is also reflected in....
-
This is an astable multivibrator? (oscillator) circuit using CMOS inverter. This circuit uses CD4007 or MC14007. This circuit has operating frequency range of ...
-
A crystal tester circuit is very simple, it contains only oscillator and detector inside. This crystal tester circuit uses one transistor for the oscillator and...
-
This circuit is two wire light level detector, we don`t separate wires for power this sensor system and for delivering the output signal. With current loop, we...
-
Current loop interface has been widely used in industrial environment because it`s robustness. Noise resistance and fail detection capability? made it suitable...
-
High voltage current sensing/monitoring can be designed using LTC6101 op-amp. The following current sensing circuit is capable of measuring electrical current...
-
The converter generates an output voltage which is linearly proportional to the input frequency waveform. Each zero crossing at the comparator`s input causes a precise amount of change to be dispensed into the op amp`s summing junction. This charge in turn....
-
The DC to AC inverter circuit shown in the schematic here is very simple circuit since it produce square wave, but it`s enough to power many devices. Here is the schematic diagram of the inverter circuit: The MOSFET is configured as bridge, so the current....
-
To operate a small motor used for opening and closing a pair of curtains. DC motor has six basic components: commutator, stator, rotor (a. k. a. , armature), axle, field magnet(s), and brushes. Component: LED, Diode, Resistor, Motor, Transistor. [hampatong.....
-
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....
-
A schematic arrangement for a two quadrant controller is shown on figure below. This figure show us the outer speed control loop and the inner current control loop. The tachogenerator derive the speed feedback signal, although alternatively an approximation....
-
This dc voltage doubler circuit produces a voltage that is twice its voltage supply. This is useful when a higher voltage level is needed out of a single l...
-
The LTC3717 is a synchronous step-down switching regulator controller for double data rate (DDR) and Quad Data Rate (QDRTM) memory termination. The controller uses a valley current control architecture to deliver very low duty cycles without requiring a....
-
Diode for alternating current is a trigger diode which conducts current only after the DIAC reach the breakdown voltage. The breakdown voltage of DIAC is 30 V..
-
This diy digital thermometer circuit can measure temperatures up to 150?C with an accuracy of ?1?C. The temperature is read on a 1V full scale-deflectio...
-
This tremolo effect circuit uses the XR2206 and the TCA730 IC which is designed as an electronic balance and volume regulator with frequency correction. T...
-
Have immensely interest in the audio DAC design, and would like to DIY a low cost but powerful audio DAC Ok, now you have the chance, as you`ll learn to create your very own audio DAC today. You will use the circuit PCM2902 for this project, where you will....
-
The following circuit shows about ?DTMF Remote Domestic System Control Circuit Diagram. Features: DTMF signals can be transmitted over a radio to ...
-
220V (5Hz) alternating voltagepass Z1 circuit filter filtering, then it will send to the connect point of AC over voltage, under voltage protect relay K2. When normal working, K2 connect point should up-close, connect AC 220V voltage to AC current-limiting....
-
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....
-
If you refer to the above schematic, you`ll notice that the VGA-to-Scope converter has been simplified, while op-amp buffers and inverters were simply eliminated. The continuous current supply to charge up the capacitor can be replaced by a 1Meg pot from 5V....
-
The potensiometer adjust the trigger on` level. The diode in the circuit diagram shows to be 1N914. This is ok if you have a light-duty relay, also the 1N914 is a signal diode so actually does not qualify. Use a 1N4001 (or better) instead. A couple of....
-
The circuit below responds to sound pressure levels from about 60 to 70 dB. The sound is picked up by an 8 ohm speaker, amplified by a transistor stage and one LM324 op-amp section..
-
Protect your LCD or Plasma TV with this tiny delay on circuit. The SMPS based power supply of these modern electronic devices is vulnerable to spikes in t...
-
given motor coil while motor need controllers to adjust position and speed. Then you will needa motor driverto amplify a controller`s low output current to a larger current that is required by a motor. Below is an article that describe you about how to....
-
Temperature controlled pulse-width-modulator (PWM) boost converter circuit diagram is shown in the following figure. The boost converter may provide temperature-controlled operation of 12V fan from 5V supply..
-
The detect ringing signal tone circuit with light and sound.It is easy to use and good quality, Do not enter the power supply. Which as Detect ringing signal...
-
Hysteresis in lamp dimmer or in other electric appliance might cause some trouble if you need a fine tuning, something like out of control. This is a circuit of...
-
This circuit is a differential analog circuit switches. The FM1208 monolithic dual differential multiplexer used in applications where the RDS (ON) must be the same match. Since RDS (ON) for monolithic dual tracks at better than 1% of the broad temperature....
-
A differential current sensing that is inserted inside a H bridge circuit. is shown in the schematic diagram below. This circuit is one example of AD8205 application. The AD8205 measures current in both directions as the motor changes direction and H-bridge....
-
The following applications circuits are intended to illustrate the following points: A 2-KO resistor should be in series with V to limit supply current with negative ringing oi the bit. inputs. Temperature compensation for Rns(on) can be provided in the....
-
This circuit is derived from an application note of L296, It is a Power Switching Regulator from ST. The advantage of using a switching regulator is that there is not much Heat Dissipation in this circuit. If you had to build the same with a series....
-
Here is calendar digital circuit. this circuit using Microcontroller is an advanced digital calendar, which displays the Date, Day, Month over the LED display. All the above systems are controlled by the Microcontroller. It has an 8 bit Microcontroller which....
-
From Figure 1, the host microprocessor (uP) controls the HMC6352 via I2C serial data interface lines for data (SDA) and clock (SCL). Two external 10k-ohm pull-up resistors to the nominal 3 volt DC supply create normally high logic states when the interface....
-
This circuit is a circuit diagram digital voltmeter with LED display. It`s ideal to use for measuring the output voltage of your DC power supply. It includes a 3.5-digit LED display with a negative voltage indicator. It measures DC voltages from 0 to 199.9V....
-
This circuit is a Digital Radar Speedometer. It allows us to evaluate the speed of any object moving, especially cars and other vehicles. The speed is calculated in kilometers per hour (KPH). Its display has three digits. This radar works with the laser....
-
This circuit is intended for precision centigrade temperature measurement, with a transmitter section converting to frequency the sensor`s output voltage proportional to the measured temperature. The output frequency bursts are conveyed into the mains supply....
-
PIC16F84A Digital Thermometer Circuit The digital thermometer circuit is built, almost all by using the temperature sensor of some form of discrete components,...
-
Figure A is an R/2R resistor ladder. Each switch that is closed increases the amount of current at. A simple channel A/D converter is shown in Fig. B. The voltage reference (D2) is common to all channels, but-the value of the dropping resistor (R9) varies as....
-
Digital scoreboard circuit functions to display values from 0 to 9 on the 7 segment display. 7 segments using a common type of anode..
-
Variable-gain amplifiers (VGAs) can be used in may types of systems, such as radio receivers. In this system, the input signal voltage depends on an...
-
Light dimmer circuit is used to control the lamp for arbitrary brightness. This dimmer circuit work for incandescent lamp, not a fluorescent one.? The dimmer...
-
Laser-receiver circuits must bias their avalanche photo diodes (APD) to achieve optimal gain. Unfortunately, an APD""s gain depends on the operating temperature. The circuit controls the operating voltage of an APD over a large temperature range to maintain....
-
This digital thermometer circuit diagram uses a common 1N4148 diode as the temperature sensor. The temperature coefficient of the diode, -2 mV / 0C is expl...
-
oscillator is a mechanical or electronic device that works on this principles of oscillation. Oscillators are a basic building blockupon which the whole structure of electronics and computers is based. Here you can find an article about how to make an....