New Circuits Page 7
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Beige Bag Software has been providing affordable and innovative circuit design tools since 1990. B2 Spice provides schematics as well as analog, digital and mixed mode electronic circuit simulation. Integrates with EAGLE and CADSTAR PCB software....
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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....
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Train Horn Circuit Diagram based IC NE556. The circuit is quite simple and easy to built, also it is inexpensive. With this circuit design, it will not give high output power, so you need to add audio amplifier to make this train horn circuit louder. Imagine....
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The following circuit shows about 6/12/24V Lead Acid Battery Charger Circuit Diagram. Features: ssentially a high-voltage pulse generator which is ....
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Most of my Blog posts involve short 3-4 hour projects/hacks that I just build up for learning and fun. I thought it was time to develop something a bit mo....
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The Quick and Easy Wireless circuit is not terribly difficult however it will take some double checking to make sure you have everything hooked up properly before working the first time. The main devices used in the circuit are the 7805, 18F452, RC Receiver....
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A simple buzzer to convert to an oscillating buzzer so as to obtain the sound similar to that of an automobile`s reverse indicator. I`ve posted a schematic(borrowed from electroschematics. com) below. I intent to replace the LED with my buzzer and omit the....
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Pick whichever circuit is better for you, but the one using the LM339 is better. Both the capacitors are 1uf metalized film, but anything that is non polar will work. It will need to be very close to 2 uF though. You can not use a capacitor that marks which....
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The SiC MOSFET also has significant advantages including simple drive circuit The silicon carbide (SiC) MOSFET has unique capabilities that make it a superior switch when compared....
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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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Hi all I made this circuit to be a light dimmer but it did not work. I use BT136 for the SCR and MOC3022 for optocoupler. Can you tell me what is the....
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We’d like to be able to use a PC to measure the temperature outside. Ideally this would be a serial connected device with a probe that could easily be placed outside. Google found us some, but there seem to be very complex and cost around $100! ..
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Despite the high impedance of its inputs, Darlington Q10 develops enough current to drive an LED. The inverted output of Q10 drives opto U5`s internal LED. Opto U5 couples to motor-control triac CR1. Motor Voltage Control Triac CR1. Triac CR1 is a....
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I am trying to design a digitally controlled analogue oscillator. The idea is that a control voltage is generated by the a microcontroller (Arduino) which is used via the 2 op amps, resistor and capacitor network which forms a integrator circuit. The....
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Development of the whole system required an exhaustive identification of all processes of the laser controller. I started with this diagram which outlines the major physical components that will be used for the cnc laser. The laser has a power supply, a....
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An useful feature of this circuit is that the frequency can be changed by changing a capacitor value, a switch can be add to choose between various frequencies...
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A, B are 2 common contact, outline drawing and pin definition. C is the infrared emission tube shape, pin definition and schematic symbol. CD4069 is the pin definition of inverter pin, and F is the 9013 transistor shape, pin definitions and symbol....
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The following circuit shows about Video and DVD Modulator in VHF / UHF Circuit Electronic Diagram. Features: oscillator uses a transistor for high ....
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Consumers have been found manipulating their electric meters, causing them to stop, under-register or even bypassing the meter, effectively using power without paying for it. An energy meter is a device that measures the amount of electrical energy supplied....
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There are several ways to read multiple switch inputs using a reduced number of microcontroller-unit (MCU) pins. For example, you can use an analog MCU pin to read multiple switches by assigning a unique voltage to each switch through a resistor network, or....
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This circuit has been designed to provide a clearly visible light, formed by 13 high efficiency flashing LEDs arranged in a pseudo-rotating order. Due to low voltage, low drain battery operation and small size, the device is suitable for mounting on bicycles....
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This is the most simplest and single transistor FM wireless transmitter circuit that ever posted in CircuitsGallery. In telecommunication field, frequency modulation (FM) transmits information by changing the frequency of a carrier wave according to message....
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The U2745B is a PLL transmitter IC which has been especially developed for the demands of RF low-cost data transmission systems at data rates up to 20 kBaud. The transmitting frequency range is 310 MHz to 440 MHz. It CAN be used in ASK sys- tems. The main....
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Consider that a school has a total of eight periods with a lunch break after the fourth period. Each period is 45 minutes long, while the duration of the lunch break is 30 minutes. The bell will be ringed to start the class, end of each period, extension at....
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This is a ultrasonic motion detector (or movement detector) circuit. The circuit claimed has a high movement sensitivity. Even air moving (hot air rising, wind blowing) will trigger it when the trimpot is set near the most sensitive position. The transmitter....
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If TIP32C (Q2) gets excessively hot, use an IRF9640 MOSFET instead. Experiment with different values for R6 to find the optimal value (I use a 390 ohm resistor). Temporarily substitute R6 for a trim potentiometer (470 or 1k) to find the optimal dumping....
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A Code Practice Oscillator and that I must have built it some time ago. I had a vague recollection of the project. It certainly looked like something I might have built. There was a straight key in the same box that plugged right into the key jack. I opened....
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This circuit, using a minimum amount of parts generates a 10Hz sine wave [based on the component values shown]. The active components are generic devices and may be substituted as required. The passive component values set the frequency and should only be....
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This is the schematics of a low cost mic mixer that can be assembled from the components in your junk box. This two channel mike mixer is designed for handling high impedance dynamic microphones. Transistor Q1 can be any general purpose pnp transistor like....
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@ goldsmith If you need a complete circuit , i have thousands of these circuits in my designs . i can give you some of them easily , but you have told ....
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This is a INA159 Dual-Polarity, Bidirectional Current-Shunt-Monitor Circuit. This circuit uses OPA340 because it has near rail-to-rail input and output swing....
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This text give reader it introduces another that Is produces to be central to seek the smooth robot as top management by 74HC240, still carry out low technology, low-cost making idea, enjoy together with everybody. The threshold voltage of the Schmitt....
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The circuit is a microphone amplifier for use with low impedance (~200 ohm) microphones. It will work with stabilized voltages between 6-30VDC. If you don`t build the impedance adapter part with T1, you get a micamp for higher impedance microphones. In this....
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h5. Introduction In this post we present the last application created from the development of the modular remote control we started describing in the issue of April....
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555 Timer Sound Effects Videos 1. This is Make website light theremin with 555 timer. Good spooky Halloween 3. film countdown 4. uHD chessboard timer karo black & 5. I made this tiny noise machine based on Forrest Mims` Engineer`s....
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SA9614 is a RF Amplifier used for signal conversion and auto laser power control (ALPC) between the CD optical pickup head and decoding chip. SA9614 includes Interface of CD optical Diode RF signal Amplifier and equalizer, VREF generation circuit, Automatic....
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The main problem with the design of stereo amplifier with a total bass driver, is that the signals of left and right channels, sooner or later, are summarized. As a result of merely adding up, the separation between channels is reduced to a minimum and....
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All of our electronic circuits were originally constructed on breadboards. Once the circuits were working, we soldered them on perfboards to give us a more robust system. We created a power board which stacked two batteries in series. This gave us access to....
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Here is the circuit diagram of a simple subwoofer filter that can be operated from a 12V DC supply. Such a circuit is very useful in automobile subwoofer applications. The circuit is nothing but a low pass filter whose pass frequency can be adjusted between....
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The Accu charger circuit is very simple and easy to make, because it only requires a few components are also not more than 10 components. Besides easy charger circuit is also very cheap and very efficient. This circuit requires power supply from a....
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The next counter section works the same way but is set up to count 4 quarters, single $1 (loonies) and single $2 (toonies). The toonies circuit is set....
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This projects makes it possible to use Sega Saturn peripherals (controllers, mouse) on a PC through an USB port. Using the schematic and firmware available on this page, one can make an adapter (Using the connector from a Saturn extension) or convert a....
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The LA3361 PLL FM multiplex stereo Demodulator is designed for low supply voltage-use appliance such as por- table Radio or car stereo. By Sanyo Semiconductor Corporation ..
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The following circuit shows about Airplane Flight Timer Circuit Diagram. Features:switches in the closed position, battery voltage in the safe ....
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Dodge Durango Fog Light Wiring Diagram...
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A couple of cheap CMOS ICs are used to digitally generate audio sinewaves across a wide range in this compact battery-powered test instrument. The oscillator features both unbalanced and balanced outputs. I use signal generators of one sort or another all....
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using only total of 7 pins from your microcontrollers GPIO. So LCD module will cost only single port out of fours. >> The EN line is called "Enable. " This control line indicates to the LCD that we are sending it data. To send data to the LCD, the EN should....
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This is a simple circuit of beeper using 555 timer. This circuit can be employed to energize lights, horn, or other signaling device at any desired interval...
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This circuit is use to 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....
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A TV flyback transformer can double as a low-power Tesla coil. The Tesla circuit consists of a pulse generator, a driver circuit, and a high-voltage transformer. Resistors R1 and R2 determine the time duration that the output at pin 3 is off, while R3 and R4....
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Frequency change produced in Colpitts oscillator by metal object near tank coil is indicated by 565 PLL connected asfrequency meter. Oscillator frequency increases when search coil is brought near nonferrous metal object. Oscillator frequency decreases, as....
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The circuit diagram of the Lie Detector is shown above. It consists of three transistors (TR1 to TR3), a capacitor (C1), tw1o lights or LEDs (L1 & L2), five resistors (R1 to R5), and a variable resistor (VR1). This circuit is based on the fact that a....
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This RF Wave Absorbion meter will detect signals between 10cms and 10m away all acording to the setting of the 22MegOhm gain adjustment potentialometer and the power of the transmitter. The RF signal is detected across the germamium OA91 doides and rectified....
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There are several sections in this website that you should read regarding track wiring. This section on track wiring, Part I, covers general wiring information, testing, and troubleshooting. Part II contains the actual wiring of track. The menu to the right....
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So there is a chance to use them in combination with a condenser microphone amplifier for a VLF Receiver. Bingo. The first tests as a Monopole gave good results. I live in a small town located at J041VG with approximately 7500 inhabitants. The height above....
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After I smashed about 5 mobile phones and collected some white LEDs, I decided to build some some LED searchlight. There are two ways to solve this problem: first, Chinese version, just connect some white LED`s to battery and use some ballast resistor. And....
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A modification to David Knight`s linear detector circuit. I wanted to build a "hi-fidelity" AM receiver and needed an ultra-linear AM detector for it. Here is the circuit I came up with: Note that I eliminated the meter circuit, and removed a lot of the....
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This guitar effect circuit uses a simple high gain amplification, followed by a symmetric clipping using parallel diodes clipper. The gain of the 741 op-amp....
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SHURE is an American corporation produces consumer and professional audio-electronics manufacturer of microphones, phonograph cartridges, discussion systems,....
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Separates 130-cps motor drive voltage from voice frequencies in output of adf receiver-P. V. Sparks, Servo Filter and Gain Control Improve Automatic Direction Finder, Electronics, 34:23, p 110-113....
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When the circuit is first powered up, neither transistor will be switched on. However, this means that at this stage they will both have high base voltages and therefore a tendency to switch on, and inevitable slight asymmetries will mean that one of the....
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This is not just another dimmer circuit. The improved design of this dimmer circuit enables its triac to be triggered with lower voltage values. Normally, the triggering voltage of a triac is around 70V. In some applications though, it is desirable to use a....
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HI FRIENDS, I HAVE A ANIMAL REPELLER CIRCUIT CIRCUIT DIAGRAM AS SHOWN: I HAVE WRKED ON THIS BUT NOT WORKING AS PREFERRED CAN U PLEASE CHECK THIS ONE....
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This is a design circuit for sine wave oscillators that will provide both a sine and square wave output for frequencies from below 20 Hz to above 20 KHz. The frequency of oscillation is easily tuned by varying a single resistor. This circuit is controlled by....
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The National Semiconductor`s Overture series of integrated circuit (IC) audio amplifiers owes its rise to `fame and glory` to a relatively big success of the 47 Laboratory`s Gaincard amplifier, based on the LM3875 chip from the National Semiconductor. Due to....
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-
Experimenting with `gainclone` amplifiers. Gainclone amplifiers use opamps instead of the tubes and transistors that can be found in most amplifiers. I now present the second reincarnation of the Chill-amp concept. My interest in trying something with opamps....
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A circuit to extract and measure the modulated carrier of an Infra Red remote control. Note that the circuit does not physically separate control pulses from modulation, but amplifies the completereceived signal allowing the waveform to be displayed ideally....
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Supports LCD Module (16x2 HD44780) Includes AVR Micro ATMEGA168 programmed with demo/test code. Top Quality US made PCB (w/Solder mask, Plated through holes, RoHS compliant) Designed by a long term amateur radio operator(N3ZI) and engineer (BSEE)....
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The HID ballast circuit includes (Figure 1) a buck stage for controlling lamp current and power, a full-bridge output stage for driving the lamp with a low-frequency (200Hz), AC square-wave voltage and current, and an ignition circuit for producing 4KV peak....
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After building my Z-match tuner, I wanted to design a circuit board for a Stockton type swr/pwr meter that I could reproduce easily and see how small I could make it. The result is in the above picture. It is a board that measures a scant 1" x 1. 5" and is....
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A 12V portable and mobile power supply circuit design which can be built quite inexpensively and needs only a minimum of circuitry. This circuit will give output current of 1 amp, well stabilized and smoothed..
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Sometimes the need arises for a simple, gated, pulsed alarm. The circuit shown here employs just four components and a piezo sounder and is unlikely to be out-done for simplicity. While it does not offer the most powerful output, it is likely to be adequate....
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The first thing that you must do, is to measure the end transistors (T3 and T4) amplifying coefficient, the hfe or ². If their disagreement is bigger than 30 %, the amplifier would not give a clear sound. I used MJ3001 and MJ2501 transistors, and this....
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You are right - this was what i was talking about in my description of EM fields in the WFC - the principle is the same, the only differance....
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This circuit shows about 4011 IC For Protection Surge Electronic CIrcuit Diagram. Features: used to delay other appliances connected to the output ....
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Monolithic/Hybrid Digital to Analog Converters using MC 1408IC,SE/NE 5018, Specifications and Applications....
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had to rewire a boat trailer due to damaged wiring and lights. I`m using a standard 4 pole flat connection to my truck. The trailer is simple - two rear lights and nbo side markers. Both rear lights are grounded to the harness to the truck. Almost everything....
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This circuit of powerful flashing lamp is good use in vehicles. The LM395 IC based on circuit also known as super-transistor, which is terribly powerful integrated monolithic power transistor with options such as thermal protection, current limit etc. In....
Beige Bag Software has been providing affordable and innovative circuit design tools since 1990. B2 Spice provides schematics as well as analog, digital and mixed mode electronic circuit simulation. Integrates with EAGLE and CADSTAR PCB software....
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....
Train Horn Circuit Diagram based IC NE556. The circuit is quite simple and easy to built, also it is inexpensive. With this circuit design, it will not give high output power, so you need to add audio amplifier to make this train horn circuit louder. Imagine....
The following circuit shows about 6/12/24V Lead Acid Battery Charger Circuit Diagram. Features: ssentially a high-voltage pulse generator which is ....
Most of my Blog posts involve short 3-4 hour projects/hacks that I just build up for learning and fun. I thought it was time to develop something a bit mo....
The Quick and Easy Wireless circuit is not terribly difficult however it will take some double checking to make sure you have everything hooked up properly before working the first time. The main devices used in the circuit are the 7805, 18F452, RC Receiver....
A simple buzzer to convert to an oscillating buzzer so as to obtain the sound similar to that of an automobile`s reverse indicator. I`ve posted a schematic(borrowed from electroschematics. com) below. I intent to replace the LED with my buzzer and omit the....
Pick whichever circuit is better for you, but the one using the LM339 is better. Both the capacitors are 1uf metalized film, but anything that is non polar will work. It will need to be very close to 2 uF though. You can not use a capacitor that marks which....
The SiC MOSFET also has significant advantages including simple drive circuit The silicon carbide (SiC) MOSFET has unique capabilities that make it a superior switch when compared....
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....
Hi all I made this circuit to be a light dimmer but it did not work. I use BT136 for the SCR and MOC3022 for optocoupler. Can you tell me what is the....
We’d like to be able to use a PC to measure the temperature outside. Ideally this would be a serial connected device with a probe that could easily be placed outside. Google found us some, but there seem to be very complex and cost around $100! ..
Despite the high impedance of its inputs, Darlington Q10 develops enough current to drive an LED. The inverted output of Q10 drives opto U5`s internal LED. Opto U5 couples to motor-control triac CR1. Motor Voltage Control Triac CR1. Triac CR1 is a....
I am trying to design a digitally controlled analogue oscillator. The idea is that a control voltage is generated by the a microcontroller (Arduino) which is used via the 2 op amps, resistor and capacitor network which forms a integrator circuit. The....
Development of the whole system required an exhaustive identification of all processes of the laser controller. I started with this diagram which outlines the major physical components that will be used for the cnc laser. The laser has a power supply, a....
An useful feature of this circuit is that the frequency can be changed by changing a capacitor value, a switch can be add to choose between various frequencies...
A, B are 2 common contact, outline drawing and pin definition. C is the infrared emission tube shape, pin definition and schematic symbol. CD4069 is the pin definition of inverter pin, and F is the 9013 transistor shape, pin definitions and symbol....
The following circuit shows about Video and DVD Modulator in VHF / UHF Circuit Electronic Diagram. Features: oscillator uses a transistor for high ....
Consumers have been found manipulating their electric meters, causing them to stop, under-register or even bypassing the meter, effectively using power without paying for it. An energy meter is a device that measures the amount of electrical energy supplied....
There are several ways to read multiple switch inputs using a reduced number of microcontroller-unit (MCU) pins. For example, you can use an analog MCU pin to read multiple switches by assigning a unique voltage to each switch through a resistor network, or....
This circuit has been designed to provide a clearly visible light, formed by 13 high efficiency flashing LEDs arranged in a pseudo-rotating order. Due to low voltage, low drain battery operation and small size, the device is suitable for mounting on bicycles....
This is the most simplest and single transistor FM wireless transmitter circuit that ever posted in CircuitsGallery. In telecommunication field, frequency modulation (FM) transmits information by changing the frequency of a carrier wave according to message....
The U2745B is a PLL transmitter IC which has been especially developed for the demands of RF low-cost data transmission systems at data rates up to 20 kBaud. The transmitting frequency range is 310 MHz to 440 MHz. It CAN be used in ASK sys- tems. The main....
Consider that a school has a total of eight periods with a lunch break after the fourth period. Each period is 45 minutes long, while the duration of the lunch break is 30 minutes. The bell will be ringed to start the class, end of each period, extension at....
This is a ultrasonic motion detector (or movement detector) circuit. The circuit claimed has a high movement sensitivity. Even air moving (hot air rising, wind blowing) will trigger it when the trimpot is set near the most sensitive position. The transmitter....
If TIP32C (Q2) gets excessively hot, use an IRF9640 MOSFET instead. Experiment with different values for R6 to find the optimal value (I use a 390 ohm resistor). Temporarily substitute R6 for a trim potentiometer (470 or 1k) to find the optimal dumping....
A Code Practice Oscillator and that I must have built it some time ago. I had a vague recollection of the project. It certainly looked like something I might have built. There was a straight key in the same box that plugged right into the key jack. I opened....
This circuit, using a minimum amount of parts generates a 10Hz sine wave [based on the component values shown]. The active components are generic devices and may be substituted as required. The passive component values set the frequency and should only be....
This is the schematics of a low cost mic mixer that can be assembled from the components in your junk box. This two channel mike mixer is designed for handling high impedance dynamic microphones. Transistor Q1 can be any general purpose pnp transistor like....
@ goldsmith If you need a complete circuit , i have thousands of these circuits in my designs . i can give you some of them easily , but you have told ....
This is a INA159 Dual-Polarity, Bidirectional Current-Shunt-Monitor Circuit. This circuit uses OPA340 because it has near rail-to-rail input and output swing....
This text give reader it introduces another that Is produces to be central to seek the smooth robot as top management by 74HC240, still carry out low technology, low-cost making idea, enjoy together with everybody. The threshold voltage of the Schmitt....
The circuit is a microphone amplifier for use with low impedance (~200 ohm) microphones. It will work with stabilized voltages between 6-30VDC. If you don`t build the impedance adapter part with T1, you get a micamp for higher impedance microphones. In this....
h5. Introduction In this post we present the last application created from the development of the modular remote control we started describing in the issue of April....
555 Timer Sound Effects Videos 1. This is Make website light theremin with 555 timer. Good spooky Halloween 3. film countdown 4. uHD chessboard timer karo black & 5. I made this tiny noise machine based on Forrest Mims` Engineer`s....
SA9614 is a RF Amplifier used for signal conversion and auto laser power control (ALPC) between the CD optical pickup head and decoding chip. SA9614 includes Interface of CD optical Diode RF signal Amplifier and equalizer, VREF generation circuit, Automatic....
The main problem with the design of stereo amplifier with a total bass driver, is that the signals of left and right channels, sooner or later, are summarized. As a result of merely adding up, the separation between channels is reduced to a minimum and....
All of our electronic circuits were originally constructed on breadboards. Once the circuits were working, we soldered them on perfboards to give us a more robust system. We created a power board which stacked two batteries in series. This gave us access to....
Here is the circuit diagram of a simple subwoofer filter that can be operated from a 12V DC supply. Such a circuit is very useful in automobile subwoofer applications. The circuit is nothing but a low pass filter whose pass frequency can be adjusted between....
The Accu charger circuit is very simple and easy to make, because it only requires a few components are also not more than 10 components. Besides easy charger circuit is also very cheap and very efficient. This circuit requires power supply from a....
The next counter section works the same way but is set up to count 4 quarters, single $1 (loonies) and single $2 (toonies). The toonies circuit is set....
This projects makes it possible to use Sega Saturn peripherals (controllers, mouse) on a PC through an USB port. Using the schematic and firmware available on this page, one can make an adapter (Using the connector from a Saturn extension) or convert a....
The LA3361 PLL FM multiplex stereo Demodulator is designed for low supply voltage-use appliance such as por- table Radio or car stereo. By Sanyo Semiconductor Corporation ..
The following circuit shows about Airplane Flight Timer Circuit Diagram. Features:switches in the closed position, battery voltage in the safe ....
A couple of cheap CMOS ICs are used to digitally generate audio sinewaves across a wide range in this compact battery-powered test instrument. The oscillator features both unbalanced and balanced outputs. I use signal generators of one sort or another all....
using only total of 7 pins from your microcontrollers GPIO. So LCD module will cost only single port out of fours. >> The EN line is called "Enable. " This control line indicates to the LCD that we are sending it data. To send data to the LCD, the EN should....
This is a simple circuit of beeper using 555 timer. This circuit can be employed to energize lights, horn, or other signaling device at any desired interval...
This circuit is use to 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....
A TV flyback transformer can double as a low-power Tesla coil. The Tesla circuit consists of a pulse generator, a driver circuit, and a high-voltage transformer. Resistors R1 and R2 determine the time duration that the output at pin 3 is off, while R3 and R4....
Frequency change produced in Colpitts oscillator by metal object near tank coil is indicated by 565 PLL connected asfrequency meter. Oscillator frequency increases when search coil is brought near nonferrous metal object. Oscillator frequency decreases, as....
The circuit diagram of the Lie Detector is shown above. It consists of three transistors (TR1 to TR3), a capacitor (C1), tw1o lights or LEDs (L1 & L2), five resistors (R1 to R5), and a variable resistor (VR1). This circuit is based on the fact that a....
This RF Wave Absorbion meter will detect signals between 10cms and 10m away all acording to the setting of the 22MegOhm gain adjustment potentialometer and the power of the transmitter. The RF signal is detected across the germamium OA91 doides and rectified....
There are several sections in this website that you should read regarding track wiring. This section on track wiring, Part I, covers general wiring information, testing, and troubleshooting. Part II contains the actual wiring of track. The menu to the right....
So there is a chance to use them in combination with a condenser microphone amplifier for a VLF Receiver. Bingo. The first tests as a Monopole gave good results. I live in a small town located at J041VG with approximately 7500 inhabitants. The height above....
After I smashed about 5 mobile phones and collected some white LEDs, I decided to build some some LED searchlight. There are two ways to solve this problem: first, Chinese version, just connect some white LED`s to battery and use some ballast resistor. And....
A modification to David Knight`s linear detector circuit. I wanted to build a "hi-fidelity" AM receiver and needed an ultra-linear AM detector for it. Here is the circuit I came up with: Note that I eliminated the meter circuit, and removed a lot of the....
This guitar effect circuit uses a simple high gain amplification, followed by a symmetric clipping using parallel diodes clipper. The gain of the 741 op-amp....
SHURE is an American corporation produces consumer and professional audio-electronics manufacturer of microphones, phonograph cartridges, discussion systems,....
Separates 130-cps motor drive voltage from voice frequencies in output of adf receiver-P. V. Sparks, Servo Filter and Gain Control Improve Automatic Direction Finder, Electronics, 34:23, p 110-113....
When the circuit is first powered up, neither transistor will be switched on. However, this means that at this stage they will both have high base voltages and therefore a tendency to switch on, and inevitable slight asymmetries will mean that one of the....
This is not just another dimmer circuit. The improved design of this dimmer circuit enables its triac to be triggered with lower voltage values. Normally, the triggering voltage of a triac is around 70V. In some applications though, it is desirable to use a....
HI FRIENDS, I HAVE A ANIMAL REPELLER CIRCUIT CIRCUIT DIAGRAM AS SHOWN: I HAVE WRKED ON THIS BUT NOT WORKING AS PREFERRED CAN U PLEASE CHECK THIS ONE....
This is a design circuit for sine wave oscillators that will provide both a sine and square wave output for frequencies from below 20 Hz to above 20 KHz. The frequency of oscillation is easily tuned by varying a single resistor. This circuit is controlled by....
The National Semiconductor`s Overture series of integrated circuit (IC) audio amplifiers owes its rise to `fame and glory` to a relatively big success of the 47 Laboratory`s Gaincard amplifier, based on the LM3875 chip from the National Semiconductor. Due to....
Experimenting with `gainclone` amplifiers. Gainclone amplifiers use opamps instead of the tubes and transistors that can be found in most amplifiers. I now present the second reincarnation of the Chill-amp concept. My interest in trying something with opamps....
A circuit to extract and measure the modulated carrier of an Infra Red remote control. Note that the circuit does not physically separate control pulses from modulation, but amplifies the completereceived signal allowing the waveform to be displayed ideally....
Supports LCD Module (16x2 HD44780) Includes AVR Micro ATMEGA168 programmed with demo/test code. Top Quality US made PCB (w/Solder mask, Plated through holes, RoHS compliant) Designed by a long term amateur radio operator(N3ZI) and engineer (BSEE).....jpg "Creating an HID Ballast with Constant Lamp Power Control")
The HID ballast circuit includes (Figure 1) a buck stage for controlling lamp current and power, a full-bridge output stage for driving the lamp with a low-frequency (200Hz), AC square-wave voltage and current, and an ignition circuit for producing 4KV peak....
After building my Z-match tuner, I wanted to design a circuit board for a Stockton type swr/pwr meter that I could reproduce easily and see how small I could make it. The result is in the above picture. It is a board that measures a scant 1" x 1. 5" and is....
A 12V portable and mobile power supply circuit design which can be built quite inexpensively and needs only a minimum of circuitry. This circuit will give output current of 1 amp, well stabilized and smoothed..
Sometimes the need arises for a simple, gated, pulsed alarm. The circuit shown here employs just four components and a piezo sounder and is unlikely to be out-done for simplicity. While it does not offer the most powerful output, it is likely to be adequate....
The first thing that you must do, is to measure the end transistors (T3 and T4) amplifying coefficient, the hfe or ². If their disagreement is bigger than 30 %, the amplifier would not give a clear sound. I used MJ3001 and MJ2501 transistors, and this....
You are right - this was what i was talking about in my description of EM fields in the WFC - the principle is the same, the only differance....
This circuit shows about 4011 IC For Protection Surge Electronic CIrcuit Diagram. Features: used to delay other appliances connected to the output ....
Monolithic/Hybrid Digital to Analog Converters using MC 1408IC,SE/NE 5018, Specifications and Applications....
had to rewire a boat trailer due to damaged wiring and lights. I`m using a standard 4 pole flat connection to my truck. The trailer is simple - two rear lights and nbo side markers. Both rear lights are grounded to the harness to the truck. Almost everything....
This circuit of powerful flashing lamp is good use in vehicles. The LM395 IC based on circuit also known as super-transistor, which is terribly powerful integrated monolithic power transistor with options such as thermal protection, current limit etc. In....
