New Circuits Page 104
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Found some more photos of the cutter parts: This shows the conical inserts to the quick change nozzle to reduce contamination of the stream on the cut. The one....
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This circuit was developed to charge the Lithium-Polymer cells used in a model aircraft. Lithium-Polymer cells are incredibly lightweight compared to Ni-cad battery packs of the same voltage and amp-hour rating. Their only drawback is that they require a....
-
This circuit controls a load (in this case a dc brushless fan) based on a temperature compared with a setpoint. THe transduced is a diode in the forward polarization regime. In fact when forward biased, the forward voltage drop accross a diode has a....
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-
-
Design a circuit with four single-bit inputs X, Y, T, and Z, but only one single-bit output E. A two bit control code word S0S1 selects which of the four inputs is propagated to the output (the selection code is not unique). Your answer should be in the form....
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This voltage to frequency converter circuit has an oscillator that is voltage controlled and has a small, 0.5% deviation. IC1 function as a multivibrator a...
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This is example project in which the 8051 is Producing PWM outputs for seperate two channels, The PWM can be used to control the phase angle of SCR or triace for power control of any AC load like Heater Motor Fan, this project can be used as heater power....
-
The circuit for a SIM card reader is shown here. The circuit uses a CMOS hex inverter and other simple components; yet, not only does it work but it can also communicate with a PC via serial port! I am learning electronic circuits as a hobby and I was....
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The schematic diagram come from circuit: Adjustable High Voltage Power Supply 0 to 1000V power supply. Go to that page to read the explanation about above power supply related circuit diagram. To supply the high voltage converter suitable source of....
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The SN74AVCA406E is a transceiver for interfacing Microprocessors with MultiMediaCards (MMCs), secure digital (SD) cards, and Memory Stick compliant products. By Texas Instruments ..
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It can be simplified and you can leave out short-circuit protection if you wish. This circuit is a Mosfet-based linear voltage regulator with a voltage drop of as low as 60mV at 1A. The circuit uses a 15V-0-15V transformer and employs an IRF540 N-channel....
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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....
-
Control electrical appliances using PC. Here is a circuit for using the printer port of a PC, for control application using software and some interface hardware. The interface circuit along with the...
-
-
-
Here is a Flasher circuit that directly derives power from AC to give brilliant flashes at the rate of one flash per second. It uses a Diac as the main ele...
-
This circuit provides an FM modulated signal with an output power of around 500mW. The input Mic preamp is built around a couple of 2N3904 transistors, audio gain limited by the 5k preset. The oscillator is a colpitts stage, frequency of oscillation governed....
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A complete description is given upon generation of required frequency by using phase shift method along with the advantages and limitation against Wien`s bridge method of oscillations. Complete circuitry of phase shift oscillator is illustrated to describe....
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Pyroelectric infrared sensor head is same with the figure. When it detects the human body infrared signal in guarding zone, the sensor head will output a positive jump pulse signal, this signal is added to input terminal P point. IC1 adopts 555 time base....
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-
A digital stop watch or digital timer circuit schematic built around timer IC LM555 and 4-digit counter IC MM74C926 with multiplexed 7-segment LED display....
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Using this low amount Project one can carbon AUDIO from TV after advancing anyone. It does not use any wire amid TV and HEADPHONE. In abode of brace of affairs it uses airy Infrared ablaze to address audio signals from TV to Headphone. After application any....
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-
You`ll feed the audio from each radio into the ipod audio output, and vice versa. which changes the impedance and affects the sound levels (along with possibly damaging the audio circuit of one or all of the radios involved). I`m no expert, by I don`t think....
-
Measure voltage across the 1k resistor connected to the input stage and Vcc. The DC voltage should be about 2 volt, or 2 mA of current through this resistor. Eg, if Vcc is at 24 volts, the side of this resistor connected to the 2N5210 transisor ought to be....
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A phase control circuit can be used to control the power delivered to an AC load. The phase control circuit control the AC waveform, cutting the cycle to give...
-
Motion detectors often we hear, is to use ultrasonic sensors, the advantages of this sensor is sensitive and rapid response. But the main problem is that sometimes these sensors also respond to vibration in the environment, such as a passing car or plane....
-
This circuit operate between 150 to 165 Mhz. The Crystals I use Are The Digi-Key Electronics Barrel Crystals CA-301 Type which cost a couple of bucks per crystal. Virtually any Fundamental Crystal between 14 and 17 Mhz will output a frequency of between 140....
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A relatively High power H-bridge motor controller (which is the most common way to control DC motors) With cheap TIP transistors. 5 Amperes of continuous current through an H-bridge module may not seen high power to someof you, depending on your field and....
-
-
This circuit will flash a white LED, on a supply from 2v to 6v and produce a very bright flash. The circuit takes about 2mA and old cells can be used. The two 100u electros in parallel produce a better flash when the supply is 6v...
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Controlling your door lock through your personal cell phone was never this easy. Learn how to build a simple electronic circuit that will help in converting your ordinary door lock into a high security door lock which can be now controlled through your own....
-
We always like to use Halloween as a chance to show off neat homemade electronics to the general public. In this special Halloween video tutorial, we have recreated the idea behind a musical instrument called the theremin, and built one into a Halloween....
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thermocouple cold junction compensation and the MAX6675 converter circuit diagram of temperature measuring system composed of The circuit components are used:Temperature measurement system composed by the MAX6675 circuit diagram as shown. K-type thermocouple....
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Do you drive an older car without an automatic "lights-on" warning circuit If so, you`ve probably accidentally left the lights on and flattened the battery on one or more occasions. This headlights reminder circuit will prevent that. It`s more complicated....
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This is a standard digital clock circuit,frequency size 1 Hz or 2 Hz. It can be used in the normal clock circuit. It consists of IC-4060 and IC-4013, the....
-
Using the LM3434 adaptive constant on-time DC/DC buck (step-down) constant current controller can be designed a very simple high power led driver application. The LM3434 provides a constant current for illuminating high power LEDs. The output configuration....
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If you want to omit this balance control, such as when using separate pots for the volume controls, see the balance control notes on the 7-tube output amplifier page. "Wes, I used the schematic posted on your site, and built this. modified slightly with....
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This power amp OCL 100w is a very excellent sound quality. Since we provide the circuit in look All direct coupling form is connection join together direct all, to cut-off frequency low-loss problems, the super bass really do not tell who. The signal Input....
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-
-
The ignition process in any vehicle becomes the heart of the entire system as without this stage the vehicle just won`t start. To initiate the process, earlier we use to have the circuit breaker unit for the required actions. Nowadays a more efficient and....
-
The Arduino displays the time and date on a LCD (optional) and in the Arduino IDE serial monitor window. A PCF8563 real time clock (RTC) IC is used to generate the time and date. The time and date can be set using the Arduino serial monitor window. An....
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Alphanumeric LCD displays have become very popular for microcontroller applications because they can add a lot to a project in a variety of different ways. A text message giving the user instructions as well as feedback can make the application seem much....
-
The circuits light a 20 watt lamp when the contacts are touched and the skin resistance is about 2 Megs or less. The circuit on the left uses a power MOSFET which turns on when the voltage between the source and gate is around 6 volts. The gate of the MOSFET....
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Hi to all I`m new in the forum or better I have used it some ago to make a diy projector!I do not know electronics so much (I`m reading books and....
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-
The simple audio mixer circuit is built on common base principle, where input voltages are transformed in alternative currents wich are summed to form the....
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This circuit can be built from readily available low-cost components, some of which may even be hiding in your junk-box! The indicated value of 22 for resistor R1 causes an average current of about 65mA through infrared emitter D1. Because the IRED is....
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automatic gain control. A control circuit that automatically changes the gain (amplification) of a receiver....
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By configuring a comparator and a transistor to control the oscillator in a charge pump circuit, you enable the pump to generate a regulated output of in principle any desired value. Charge pump ICs can either invert or double an input voltage (for example,....
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-
A popular project among microcontroller aficionados is to build a radio-controlled clock. Tiny receiver boards are available, with a pre-adjusted ferrite antenna, that receive and demodulate the DCF77 time signal broadcast from Mainf lingen in Germany. DCF77....
-
This post answers the question, ""How to capture a pulse to generate an interrupt in PIC16F877"" ? Also, using PIC16 simulator (Proteus) you can verify this....
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This LED thermometer is designed for in home use, to read temperatures between about 60 and 78 degrees Fahrenheit. It is based around a precision temperature sensor IC, the LM34DZ. This sensor require no calibration and can measure temperatures of between....
-
Piezo Disks, Audio Schematics and a Condenser Mic The schematics and diagrams here are provide the basis for sonic investigations using piezo disks and mics along use or connect and use 2 and 3 terminal electret condenser stage buffers the high output....
-
A low cost device to temporarily disable the reception of the civilian coarse acquisition (C/A) code used for the standard positioning service (SPS) on the Global Positioning System (GPS/NAVSTAR) L1 frequency of 1575. 42 MHz. This is accomplished by....
-
With many audio systems consisting of separate units, you`ll oftennd that due to economic reasons only the amplifier has a remote control receiver module. The control signals are then sent to the other units using patch cables. The tuner and CD player, for....
-
M1 is a stepper taken from an old disk drive. There are five pins, i. e. , common, coil 1, 2, 3 and 4. Resistance measured between common pin and each coil is about 75 Ohms. Driving current for each coil is then needed about 60mA at +5V supply. A Darlington....
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Unit is driving 80V/10A motor. I currently use the following matching rigg, but since MOSFETs isn`t my domain I`m abit uncertain of the validity of the matching in accordance with the application...
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One requirement in a wide range of applications is a spontaneous source of some continuous signal, having a regular and definable wave shape. One of the most important of these is a square wave. The circuit to the right uses a comparator with both positive....
-
Mixers (sometimes known as frequency converters), modulators, balanced modulators and other circuit blocks are considered below. Each works on the same basic principles. A mixer circuit normally has two inputs - from two separate signal sources. In the....
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Circuit Diagram for Mini Emergency Lamp. This Mini Emergency Lamp turns on when power fails to give cool white light in the room. It uses 1 watt White LED to provide sufficient light in the room ..
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Calculates the difference between the two waveforms to arrive at what he believes is the voltage across the CSR. At the 33Kc or so frequency of the positive going voltage peak (calculated from time interval at FWHM), around 500nHy of inductance in the....
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The Radio Hat was a portable radio built into a pith helmet that would bring in stations within a 20 mile (32km) radius. It was introduced in early 1949 for $7. 95 as the "Man-from-Mars Radio Hat. " [1] Thanks to a successful publicity campaign, the Radio....
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At the start condition all pin 15 are connected to the ground, so R0 is energized. A 555multivibrator sendsthe clock signalto IC1, which activates the outputs from R0 to R8. This simple circuit can be utilized to drive a monostable relay through a single....
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-
This circuit uses a thin piezoelectric sensor to sense the vibrations generated by knocking on a surface; eg, a door or table. Basically, it amplifies and processes the signal from the sensor and sounds an alarm for a preset period. In operation, the....
-
The performance of the 80 meter CW transceiver using the phase method for side band suppression is very good. Construction was easy with all good obtainable standard electronic components and without the expensive or complex crystal filter. Almost nothing is....
-
This led series will Blinking alternately, The way it works is determined by IC NE555 and transistors are used as reinforcement for each section (20 upper, 20 lower) work optimally. 555 circuit below is a flashing bicycle light powered with four C, D or AA....
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-
Here a single IC 556 has been incorporated for creating the PWM pulses. One half of the IC has been configured as the high frequency generator for feeding the other half IC which is rigged as a pulse width modulator. The sample modulating frequency is....
-
-
Here`s an updated schematic with the RF Solutions receiver and some other small additions. There`s a lot of extra circuitry to deal with the signals....
-
The equation is: Putting some values to this equation, if a circuit has a resistance of 25 ohms (O) and a potential of 125 volts, the current that is drawn in this circuit would be 5 amps. This basic circuit will give you some understanding for the next....
-
Isolation amplifiers provide an effective method to protect IGBTs against over-current, overload and overvoltage conditions in addition to their current/voltage sensing function. Using these devices together with feature-rich gate drivers, you can implement....
-
When turning a computer on and off, various peripherals (such as printers, screen, scanner, etc.) often have to be turned on and off as well. By using the....
-
This single IC circuit which is based on the Wien Bridge Oscillator, produces low distortion sine waves in the range of 15 Hz up to 22KHz in two ranges. The two output voltage ranges are from about 0-250mV and 0-2. 5Vrms. The image to the right shows an....
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With the help of a simple ceramic piezo-electric detector it is possible to assemble an interesting and useful Impact sensor unit,which can be used to dete....
-
DC Power Supply 9 Volt Regulator, that can give current get about 1 Amp arrive at 2Amp. I sees part already modify transistor TIP31 and part come to can be usable well. By this circuit can give voltage 9 Volt at 1 Amp, be stable or can fine can decorate 6V....
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12V Battery Charge Nominal Discharge (Low) Indicator Circuit This circuit monitors car battery voltage. It provides an indication of nominal....
-
The voltage regulators from the 78xx-series are found in many analogue power supplies. It seems, then, somewhat super‚uous to say much more about them. But on the other hand, it can be very useful to highlight the important points, just because they are so....
-
The LME49830 EF125WT1 amplifier PCB module showcases National Semiconductor s LME ultra-high fidelity power amplifier input stage ICs (drivers). The LME49....
-
-
How to make the hardware connections between the Raspberry Pi and the house wiring. Check out this post if you want a PCB that does the connections for you. In my house (and the vast majority of others) the thermostat wiring runs at 24V AC. There`s a live....
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Some links and info on remotely using a DSLR, mainly arduino-based..
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Read the article and learn how you can make your own parking sensor for just $4.99...
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To order boards, click to go to the ESP Purchase form. Verify the price and postage, then open the order form, fill it in and print it from your browser. Boards are sold only as a stereo pair, and are supplied with component overlay, circuit diagram, bill of....
-
In Figure 7-2 is the FSK signal demodulation circuit composed of the digital phase-lock. The circuit consists of 2 oscillators with different frequencies, i.e crystal oscillators X (the frequency is 983.04KHz) and X2 (the frequency is 1.2288MHz) compose the....
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The emitter is always going to be a few hundred milli volts behind the base voltage (in this type of configuration) and as the base voltage is 5V, depending on how much current is taken by the "switched" circuit" on the emitter, it is more likely to be 4. 5V....
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The power switch with infrared proximity sensor is intended for the recognition of obstructions at distances of a few millimetres to a few centimetres. Thi....
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A portable phone charger for a Siemens mobile phone. Since I don`t use that phone anymore and recent phones can usually be charged with a USB connector I built a new version of the charger. This time with a proper PCB, a USB connector and a higher current....
Found some more photos of the cutter parts: This shows the conical inserts to the quick change nozzle to reduce contamination of the stream on the cut. The one....
This circuit was developed to charge the Lithium-Polymer cells used in a model aircraft. Lithium-Polymer cells are incredibly lightweight compared to Ni-cad battery packs of the same voltage and amp-hour rating. Their only drawback is that they require a....
This circuit controls a load (in this case a dc brushless fan) based on a temperature compared with a setpoint. THe transduced is a diode in the forward polarization regime. In fact when forward biased, the forward voltage drop accross a diode has a....
Design a circuit with four single-bit inputs X, Y, T, and Z, but only one single-bit output E. A two bit control code word S0S1 selects which of the four inputs is propagated to the output (the selection code is not unique). Your answer should be in the form....
This voltage to frequency converter circuit has an oscillator that is voltage controlled and has a small, 0.5% deviation. IC1 function as a multivibrator a...
This is example project in which the 8051 is Producing PWM outputs for seperate two channels, The PWM can be used to control the phase angle of SCR or triace for power control of any AC load like Heater Motor Fan, this project can be used as heater power....
The circuit for a SIM card reader is shown here. The circuit uses a CMOS hex inverter and other simple components; yet, not only does it work but it can also communicate with a PC via serial port! I am learning electronic circuits as a hobby and I was....
The schematic diagram come from circuit: Adjustable High Voltage Power Supply 0 to 1000V power supply. Go to that page to read the explanation about above power supply related circuit diagram. To supply the high voltage converter suitable source of....
The SN74AVCA406E is a transceiver for interfacing Microprocessors with MultiMediaCards (MMCs), secure digital (SD) cards, and Memory Stick compliant products. By Texas Instruments ..
It can be simplified and you can leave out short-circuit protection if you wish. This circuit is a Mosfet-based linear voltage regulator with a voltage drop of as low as 60mV at 1A. The circuit uses a 15V-0-15V transformer and employs an IRF540 N-channel....
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....
Control electrical appliances using PC. Here is a circuit for using the printer port of a PC, for control application using software and some interface hardware. The interface circuit along with the...
Here is a Flasher circuit that directly derives power from AC to give brilliant flashes at the rate of one flash per second. It uses a Diac as the main ele...
This circuit provides an FM modulated signal with an output power of around 500mW. The input Mic preamp is built around a couple of 2N3904 transistors, audio gain limited by the 5k preset. The oscillator is a colpitts stage, frequency of oscillation governed....
A complete description is given upon generation of required frequency by using phase shift method along with the advantages and limitation against Wien`s bridge method of oscillations. Complete circuitry of phase shift oscillator is illustrated to describe....
Pyroelectric infrared sensor head is same with the figure. When it detects the human body infrared signal in guarding zone, the sensor head will output a positive jump pulse signal, this signal is added to input terminal P point. IC1 adopts 555 time base....
A digital stop watch or digital timer circuit schematic built around timer IC LM555 and 4-digit counter IC MM74C926 with multiplexed 7-segment LED display....
Using this low amount Project one can carbon AUDIO from TV after advancing anyone. It does not use any wire amid TV and HEADPHONE. In abode of brace of affairs it uses airy Infrared ablaze to address audio signals from TV to Headphone. After application any....
You`ll feed the audio from each radio into the ipod audio output, and vice versa. which changes the impedance and affects the sound levels (along with possibly damaging the audio circuit of one or all of the radios involved). I`m no expert, by I don`t think....
Measure voltage across the 1k resistor connected to the input stage and Vcc. The DC voltage should be about 2 volt, or 2 mA of current through this resistor. Eg, if Vcc is at 24 volts, the side of this resistor connected to the 2N5210 transisor ought to be....
A phase control circuit can be used to control the power delivered to an AC load. The phase control circuit control the AC waveform, cutting the cycle to give...
Motion detectors often we hear, is to use ultrasonic sensors, the advantages of this sensor is sensitive and rapid response. But the main problem is that sometimes these sensors also respond to vibration in the environment, such as a passing car or plane....
This circuit operate between 150 to 165 Mhz. The Crystals I use Are The Digi-Key Electronics Barrel Crystals CA-301 Type which cost a couple of bucks per crystal. Virtually any Fundamental Crystal between 14 and 17 Mhz will output a frequency of between 140....
A relatively High power H-bridge motor controller (which is the most common way to control DC motors) With cheap TIP transistors. 5 Amperes of continuous current through an H-bridge module may not seen high power to someof you, depending on your field and....
This circuit will flash a white LED, on a supply from 2v to 6v and produce a very bright flash. The circuit takes about 2mA and old cells can be used. The two 100u electros in parallel produce a better flash when the supply is 6v...
Controlling your door lock through your personal cell phone was never this easy. Learn how to build a simple electronic circuit that will help in converting your ordinary door lock into a high security door lock which can be now controlled through your own....
We always like to use Halloween as a chance to show off neat homemade electronics to the general public. In this special Halloween video tutorial, we have recreated the idea behind a musical instrument called the theremin, and built one into a Halloween....
thermocouple cold junction compensation and the MAX6675 converter circuit diagram of temperature measuring system composed of The circuit components are used:Temperature measurement system composed by the MAX6675 circuit diagram as shown. K-type thermocouple....
Do you drive an older car without an automatic "lights-on" warning circuit If so, you`ve probably accidentally left the lights on and flattened the battery on one or more occasions. This headlights reminder circuit will prevent that. It`s more complicated....
This is a standard digital clock circuit,frequency size 1 Hz or 2 Hz. It can be used in the normal clock circuit. It consists of IC-4060 and IC-4013, the....
Using the LM3434 adaptive constant on-time DC/DC buck (step-down) constant current controller can be designed a very simple high power led driver application. The LM3434 provides a constant current for illuminating high power LEDs. The output configuration....
If you want to omit this balance control, such as when using separate pots for the volume controls, see the balance control notes on the 7-tube output amplifier page. "Wes, I used the schematic posted on your site, and built this. modified slightly with....
This power amp OCL 100w is a very excellent sound quality. Since we provide the circuit in look All direct coupling form is connection join together direct all, to cut-off frequency low-loss problems, the super bass really do not tell who. The signal Input....
The ignition process in any vehicle becomes the heart of the entire system as without this stage the vehicle just won`t start. To initiate the process, earlier we use to have the circuit breaker unit for the required actions. Nowadays a more efficient and....
The Arduino displays the time and date on a LCD (optional) and in the Arduino IDE serial monitor window. A PCF8563 real time clock (RTC) IC is used to generate the time and date. The time and date can be set using the Arduino serial monitor window. An....
Alphanumeric LCD displays have become very popular for microcontroller applications because they can add a lot to a project in a variety of different ways. A text message giving the user instructions as well as feedback can make the application seem much....
The circuits light a 20 watt lamp when the contacts are touched and the skin resistance is about 2 Megs or less. The circuit on the left uses a power MOSFET which turns on when the voltage between the source and gate is around 6 volts. The gate of the MOSFET....
Hi to all I`m new in the forum or better I have used it some ago to make a diy projector!I do not know electronics so much (I`m reading books and....
The simple audio mixer circuit is built on common base principle, where input voltages are transformed in alternative currents wich are summed to form the....
This circuit can be built from readily available low-cost components, some of which may even be hiding in your junk-box! The indicated value of 22 for resistor R1 causes an average current of about 65mA through infrared emitter D1. Because the IRED is....
automatic gain control. A control circuit that automatically changes the gain (amplification) of a receiver....
By configuring a comparator and a transistor to control the oscillator in a charge pump circuit, you enable the pump to generate a regulated output of in principle any desired value. Charge pump ICs can either invert or double an input voltage (for example,....
A popular project among microcontroller aficionados is to build a radio-controlled clock. Tiny receiver boards are available, with a pre-adjusted ferrite antenna, that receive and demodulate the DCF77 time signal broadcast from Mainf lingen in Germany. DCF77....
This post answers the question, ""How to capture a pulse to generate an interrupt in PIC16F877"" ? Also, using PIC16 simulator (Proteus) you can verify this....
This LED thermometer is designed for in home use, to read temperatures between about 60 and 78 degrees Fahrenheit. It is based around a precision temperature sensor IC, the LM34DZ. This sensor require no calibration and can measure temperatures of between....
Piezo Disks, Audio Schematics and a Condenser Mic The schematics and diagrams here are provide the basis for sonic investigations using piezo disks and mics along use or connect and use 2 and 3 terminal electret condenser stage buffers the high output....
A low cost device to temporarily disable the reception of the civilian coarse acquisition (C/A) code used for the standard positioning service (SPS) on the Global Positioning System (GPS/NAVSTAR) L1 frequency of 1575. 42 MHz. This is accomplished by....
With many audio systems consisting of separate units, you`ll oftennd that due to economic reasons only the amplifier has a remote control receiver module. The control signals are then sent to the other units using patch cables. The tuner and CD player, for....
M1 is a stepper taken from an old disk drive. There are five pins, i. e. , common, coil 1, 2, 3 and 4. Resistance measured between common pin and each coil is about 75 Ohms. Driving current for each coil is then needed about 60mA at +5V supply. A Darlington....
Unit is driving 80V/10A motor. I currently use the following matching rigg, but since MOSFETs isn`t my domain I`m abit uncertain of the validity of the matching in accordance with the application...
One requirement in a wide range of applications is a spontaneous source of some continuous signal, having a regular and definable wave shape. One of the most important of these is a square wave. The circuit to the right uses a comparator with both positive....
Mixers (sometimes known as frequency converters), modulators, balanced modulators and other circuit blocks are considered below. Each works on the same basic principles. A mixer circuit normally has two inputs - from two separate signal sources. In the....
Circuit Diagram for Mini Emergency Lamp. This Mini Emergency Lamp turns on when power fails to give cool white light in the room. It uses 1 watt White LED to provide sufficient light in the room ..
The Radio Hat was a portable radio built into a pith helmet that would bring in stations within a 20 mile (32km) radius. It was introduced in early 1949 for $7. 95 as the "Man-from-Mars Radio Hat. " [1] Thanks to a successful publicity campaign, the Radio....
At the start condition all pin 15 are connected to the ground, so R0 is energized. A 555multivibrator sendsthe clock signalto IC1, which activates the outputs from R0 to R8. This simple circuit can be utilized to drive a monostable relay through a single....
This circuit uses a thin piezoelectric sensor to sense the vibrations generated by knocking on a surface; eg, a door or table. Basically, it amplifies and processes the signal from the sensor and sounds an alarm for a preset period. In operation, the....
The performance of the 80 meter CW transceiver using the phase method for side band suppression is very good. Construction was easy with all good obtainable standard electronic components and without the expensive or complex crystal filter. Almost nothing is....
This led series will Blinking alternately, The way it works is determined by IC NE555 and transistors are used as reinforcement for each section (20 upper, 20 lower) work optimally. 555 circuit below is a flashing bicycle light powered with four C, D or AA....
Here a single IC 556 has been incorporated for creating the PWM pulses. One half of the IC has been configured as the high frequency generator for feeding the other half IC which is rigged as a pulse width modulator. The sample modulating frequency is....
Here`s an updated schematic with the RF Solutions receiver and some other small additions. There`s a lot of extra circuitry to deal with the signals....
The equation is: Putting some values to this equation, if a circuit has a resistance of 25 ohms (O) and a potential of 125 volts, the current that is drawn in this circuit would be 5 amps. This basic circuit will give you some understanding for the next....
Isolation amplifiers provide an effective method to protect IGBTs against over-current, overload and overvoltage conditions in addition to their current/voltage sensing function. Using these devices together with feature-rich gate drivers, you can implement....
When turning a computer on and off, various peripherals (such as printers, screen, scanner, etc.) often have to be turned on and off as well. By using the....
This single IC circuit which is based on the Wien Bridge Oscillator, produces low distortion sine waves in the range of 15 Hz up to 22KHz in two ranges. The two output voltage ranges are from about 0-250mV and 0-2. 5Vrms. The image to the right shows an....
With the help of a simple ceramic piezo-electric detector it is possible to assemble an interesting and useful Impact sensor unit,which can be used to dete....
DC Power Supply 9 Volt Regulator, that can give current get about 1 Amp arrive at 2Amp. I sees part already modify transistor TIP31 and part come to can be usable well. By this circuit can give voltage 9 Volt at 1 Amp, be stable or can fine can decorate 6V....
12V Battery Charge Nominal Discharge (Low) Indicator Circuit This circuit monitors car battery voltage. It provides an indication of nominal....
The voltage regulators from the 78xx-series are found in many analogue power supplies. It seems, then, somewhat super‚uous to say much more about them. But on the other hand, it can be very useful to highlight the important points, just because they are so....
The LME49830 EF125WT1 amplifier PCB module showcases National Semiconductor s LME ultra-high fidelity power amplifier input stage ICs (drivers). The LME49....
How to make the hardware connections between the Raspberry Pi and the house wiring. Check out this post if you want a PCB that does the connections for you. In my house (and the vast majority of others) the thermostat wiring runs at 24V AC. There`s a live....
Read the article and learn how you can make your own parking sensor for just $4.99...
To order boards, click to go to the ESP Purchase form. Verify the price and postage, then open the order form, fill it in and print it from your browser. Boards are sold only as a stereo pair, and are supplied with component overlay, circuit diagram, bill of....
In Figure 7-2 is the FSK signal demodulation circuit composed of the digital phase-lock. The circuit consists of 2 oscillators with different frequencies, i.e crystal oscillators X (the frequency is 983.04KHz) and X2 (the frequency is 1.2288MHz) compose the....
The emitter is always going to be a few hundred milli volts behind the base voltage (in this type of configuration) and as the base voltage is 5V, depending on how much current is taken by the "switched" circuit" on the emitter, it is more likely to be 4. 5V....
The power switch with infrared proximity sensor is intended for the recognition of obstructions at distances of a few millimetres to a few centimetres. Thi....
A portable phone charger for a Siemens mobile phone. Since I don`t use that phone anymore and recent phones can usually be charged with a USB connector I built a new version of the charger. This time with a proper PCB, a USB connector and a higher current....
