New Circuits Page 128
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This is a very versatile voice modulator circuit using IC HT8950A from Holtek Semiconductors. The IC is capable of creating 7 upward or downward steps on the frequency of the input voice at a rate of 8Hz. There is also two special variation effects namely....
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Amateur laser construction basic information on the construction of various types of lasers from scratch including: home-built laser safety, setting up a home laser lab, sources of supplies and chemicals, vacuum systems, glass working, structural materials,....
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SCC3 12 Volt 20 Amp Solar Charge Controller. A kit with the circuit board and parts for this circuit is available from CirKits. SCC3 - 12 Volt 20 Amp Solar Charge Controller (C) G. Forrest Cook June...
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Normally home appliances are controlled by means of switches, sensors, etc. However, physical contact with switches may be dangerous if there is any shorting. The circuit described here requires no physical contact for operating the appliance. You just need....
-
-
A circuit of an off-line telephone tester which does not require any telephone line for testing a telephone instrument. The circuit is so simple that it can be easily assembled even by a novice having very little knowledge of electronics. A telephone line....
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Negative video plus iff signals are inserted at grid, while range strobe, from cathode output of blocking oscillator, is applied to cathode. -NBS, "Handbook Preferred Circuits Navy Aeronautical Electronic Equipment, " Vol. 1, Electron Tube Circuits, 1963, p....
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A Digital Clock can be made easily by using PIC Microcontroller, DS1307 and a 16G—2 LCD. I have already posted about Interfacing DS1307 RTC with PIC Microcontroller. The DS1307 RTC can work either in 24-hour mode or 12-hour mode with AM/PM indicator. It....
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Phase Locked Loop (PLL) Operating Principle with block diagram showing Phase Detector, Voltage Controlled Oscillator, Low Pass Filter....
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The TEA5711 is a high performance Bimos IC for use in AM/FM stereo Radios All necessary functions are integrated: from AM and FM front-end to AM detector and FM stereo output stages. ..
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Here is a simple LED blinker or flasher for decoration purpose. The 20 High bright LEDs flashes alternately giving a brilliant colour display. The circuit....
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Briefly, the circuit works as follows; the clock signal drives 4 D-flipflops in the control section which store the on/off state of each of the current directions for the two stepper motor coils. The flipflops comprise a FSM (finite state machine) which....
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The following figure shown an example of a three-output flyback regulator built using LM2577 that has electrical isolation between the input and output voltages. The values shown in the circuit diagram will be 5V for the voltage. An electrical isolation is....
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The first was interested in a flexible preamp for use with a high-end acoustic guitar with piezo-electric bridge pickup, and the second wanted a preamp for use with a guitar emulator, to provide add someof the warmth that vacuum valves can provide. Both of....
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Since the ultrasonic receiver used in this circuit is one designed to vibrate optimally at about 40 kHz, the transmitter paired with this receiver must also transmit 40 kHz waves. When these waves hit the receiver, the receiver vibrates and produces electric....
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This is a small general purpose audio test set. It comprises a low 0. 3% distortion phase shift oscillator and a level meter. The level meteris set at 100mV FSD and can be used for gain measurements and general testing. Current consumption is just under 4mA.....
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The completion of a 35 year project to build a practice guitar amp....
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This receiver covers 8.5 to 11.5 MHz in two bands and has a sensitivity of under 1 ?V. Nn NE602 mixer feeds a 455-kHz IF amplifier (Q1 and Q2), detector D4, and audio amplifier IC2. Q4 serves as an AGC amplifier coil data is given in the table. The LO is....
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Hey! It`s another ESQ-1 repair thread! I got an ESQ-1 tonight for a very good price, and I totally expected it to have a few issues. And it`s got them....
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This is a simple SCR based burglar alarm circuit. Its features include automatic Exit and Entry delays - together with a timed Bell Cut-off and Reset. The basic alarm has a single zone. This will be adequate in many situations. However - the modular design....
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How to build a MIDI interface to connect a SB/SB Pro/SB16 sound card joystick port to a MIDI capable musical instrument....
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This figure shows the schematic diagram of the simple inductance meter. U1, a 74LS00 two-input quad NAND gate logic integrated circuit, two resistors, a capacitor, and a surplus microprocessor crystal form a stable crystal oscillator near the marked....
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If you are working at frequencies of the order of 850MHz to 4GHz andnd that a frequency multiplier is required, the HMC 187, HMC 188 and HMC 189 (see table) frequency doubler may be just the solution you are looking for. The isolation performance of these....
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This design allows to operate two intercom stations leaving the operator free of using his/her hands in some other occupation, thus avoiding the usual push-to-talk operation mode. No complex changeover switching is required: the two units are connected....
-
An equalizer is a device that allows you to adjust the gains of individual frequencies. You may want to lower bass, so on an equalizer, you would go to the frequency range of bass, which may be around 500Hz and turn down the volume. If you want to increase....
-
The post explains a simple delay ON circuit which allows the connected load at the output to be switched ON with some predetermined delay after power switch ON. The explained circuit can be used for all applications which calls for an initial delay ON....
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The beacon controller is intended to be operated for telemetering data available on board of the VUSAT in Morse code so that the ham radio operator can decode the info without any costly and complex equipment. The design strictly follows the KISS concept. It....
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Small and very useful circuit, Can be built on a veroboard Volt regulators such as the LM708, and LM317 series (and others) sometimes need to provide a li....
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This circuit shows about 300-350W Lighting Control Circuit Diagram . Features: Cheap to build, Simple circuit, 120V AC voltages. Component: ....
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Acoustic spectrum is extended by the 20Hz frequency is very low and reaches as high frequency 20000Hz. In the low frequency is lowered sense of direction. This reasoning leads us to attribute to the speaker`s use of very low frequency. Making it to you we....
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-
The ATA5743 is a multi-chip PLL receiver device supplied in an SSO20 package. It has been especially developed for the demands of RF low-cost data transmission sys- tems with data rates from 1 kBaud to 10 kBaud in Manchester or Bi-phase code. The receiver is....
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The pulse width of the compact pulse cum frequency modulator can be varied by altering the change-over point of comparator IC1 with a control voltage via resistor R1. The hysteresis of the IC is determined by resistors R3 and R4. The control voltage also....
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As the continuous growth of global vehicle production and owned, the problems brought by vehicles are conspicuousness day after day. These problems are much more serious in China. Thus developing zero emission electric vehicles have become the main....
-
The application circuit shown in the picture below with output voltage higher thanreferenced voltage is composed of the W723 multi-port adjustable positive stabilizer. There is current limiting protectionin this circuit and the output voltage is adjustable....
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The following circuit diagram is a simplified application circuit of the TDA8932B/33(B) device when operated from an asymmetrical supply (single supply)....
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The circuit includes a shift register chip (74HC595N), which I couldn`t find on CircuitLab. Is there any specific drawing to represent a shift register on a schematic I can`t help you with circuitlab, but if you just want a schematic picture, you can take a....
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The ICM7226 is a fully integrated Universal Counter and LED Display driver. It combines a high frequency Oscillator a decade timebase Counter an 8-decade data Counter and Latches a 7-segment decoder, digit multiplexer and segment and digit drivers which CAN....
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LED message system on a Strida folding bicycle wheel After I`ve bought my strida folding bicycle, one of the first things I`ve done was to check out instru....
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It started out as a simple unenclosed variac (variable autotransformer) and electrical outlet mounted on a block of wood. I eventually put it in the case of what used to be an old audio signal generator for safety and appearance. Among the other added....
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This egg timer, which is both simple and functional, shows once again that it is not essential to use a microcontroller for everything these days. The circuit consists of only two ICs from the standard 4000 logic family, a multi-position rotary switch and a....
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This photoelectric smoke detector circuit uses one LED and 2 LDRs to detect the smoke and sound an alarm. The LM1801 IC is the best choice for this circuit....
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This rf amplifier ensure the power you need to boost a small transmitter. Depending of input rf power, power supply and transistor, this amplifier can boos....
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The circuit, is a comparator, can measure with step of 1Volt, the voltage of battery of car. The clue of voltage become after comparison of voltage of battery, that is applied in the inverting inputs of amplifiers, with voltages of reference that are....
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The circuit described here can create three different US-style` siren sounds: police, ambulance and fire engine. The desired sound can be selected using switch S1. The circuit can be used in toys (such as model vehicles), as part of an alarm system, and in....
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The article describes a simple method of making an incremental LED bar graph by using the IC 4017, which is rather equipped with specifications not suiting the present functions. Let`s learn how we can mod the IC for the operations. Here we study an easy....
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The afterward diagram is the four bandage blaster circuit. Blaster is about acclimated to advance the allegiance of sound, to accent assertive instruments, to abolish causeless noises, or to actualize absolutely new and altered timbres..
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The LT3754 16 channel LED driver with a step-up DC DC controller designed by Linear Technology is capable of driving up to 45V of LEDs. Each channel of the LT3754 led driver contains an accurate current sink with ±2. 8% current matching. ..
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When the carrier level is adequate to switch the cross-coupled pair of differential amplifiers, the modulation signal, which has been applied to the gate, will be switched at the carrier rate, between the collector loads. When switching occurs, it will....
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Infrared transmitter and receiver circuit shown in the schematic diagram below can be used as remote control. The transmitter is basically an oscillator circuit, and the frequency can be adjusted using R1 potentiometer (or trimmer pot). This oscillation....
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Color sensor circuit which can sense eight colors, i.e. blue, green and red (primary colors); magenta, yellow and cyan (secondary colors); and black and white...
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Here is a simple LED night light circuit which can be used as a room night lamp. The circuit is simple and can be built with few components. The circuit is using four LEDs to perform as a night lamp. You can use blue or white colour LEDs or any other colour....
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A Light Dependent Resistor (LDR) to create a simple childrens bedroom nightlight which turns on automatically when it gets dark and turns off when it gets light. An LDR`s resistance changes depending upon the amount of light hitting the sensor. For the LDR....
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Army Radio Sales Co. specialises in military communications equipment for the ham radio operator or collector. Military Radios From Many Countries For Sale, We Buy and Swap Military Radios and Accessories....
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This multitone electronic siren is useful for burglar alarms, reverse horns, etc. It produces five different audio tones and is much more earcatching than a single-tone siren. The circuit is built around popular CMOS oscillator-cum-divider IC 4060 and small....
-
The Dynaco Mark III is the highest power amplifier that was widely sold under the dyna name. There was a nigher power amp (the Mark VI), but it wasn`t widely available. The Dyna MKIII has a basic design flaw that none of the other Dynaco products have. The....
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-
-
-
BD237 datasheet, .Selling leads from all over the world, ChinaICMart is the world`s biggest IC trading marketplace on the internet. We offer finest suppliers for BD237, you can also download the datasheet for BD237...
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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...
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The signal from a synchro receiver or a variable resistive cam follower (potentiometer) is boosted by operational amplifier U1, whose output swing is limited by back-to-back zeners D3 and D4. The signal is then applied to operational amplifiers U2 and U3,....
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I dont claim circuit can test all bad mosfets or all fault mosfet conditions. If mosfet is working it will operate in the astable multivibrator circuit causing the Led to flash...
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-
The Schematic has three main parts to it. The Sensor Circuitry where the accelerometer is wired up to the A/D converters. The second part is the power circuit where we have the On/Off switch, the 3. 7v battery & +5v 7805 Voltage Regualtor. The 3rd part of....
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Using the LM1458 IC number to expand the difference of the input signal left (L). It came out as surround sound sure enough. When raising the power and enter the left and right input circuit. The signal on the left (L) to signal coupling through C2 and R1 to....
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-
The main reason to go to the trouble and expense of running trains on battery power is to avoid cleaning or even wiring the track. The issues of track cleaning really can be a big deal. Adding radio control to a battery power system adds the capability of....
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What is a servo? A servo is a small motor that you can position at any angle very accurately. It contains internal circuits that will automatically maintain....
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This circuit is a ultra low noise magnetic phono preamp. This circuit uses an LM381/1A. This circuit also includes RIAA equalization. This circuit has ultra....
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This circuit can be used for an assist in parking the car near the garage wall backing up Pls. LED D7 illuminates Pls bumper-wall distance is about 20 cm. , D7 + D6 illuminate at about 10 cm. and D7 + D6 + D5 at about 6 cm. In this manner you are alerted Pls....
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This circuit shows about LM741 Ham Radio Circuit Diagram. Features: including AM, FM, 7 MHz SSB Transceiver, FSM, Dummy load, DSB transmitters, ....
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This is a color sensor Circuit Diagram. This circuit will sense 8 colors that are:, green, red and blue ; magenta, cyan and yellow ; and black and white. It`s will be very useful for robotics project. The object whose colour is required to be detected should....
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An Intergrated ircuit is just that. an intergrated circuit. These small packages combine many individual components to perform a specific function. They vary in shape and size depending on their complexity. They are categorised into functions like Audio,....
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-
IC Voltage Regulators -Circuit diagram & Block diagram of Linear,Fixed, Adjustable (positive & negative) & Switching voltage regulators....
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-
Schematic, breadboard photo, parts list, and results of several transistor variations on the classic bipolar hbridge motor driver circuit....
-
An Armstrong Oscillator is a type of oscillator that uses a tickler coil which provides feedback from tank circuit. The Armstrong Oscillator is used to produce a sine-wave output of constant amplitude and of fairly constant frequency within the rf range.....
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The purpose of this project is to construct a computer that uses the combined computational power of many microcontrollers (MCUs). All the MCUs cooperate to solve one problem. The computer is defined as parallel processing machine and the algorithms that....
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-
There are many circuits for low voltage regulators. For higher voltages, such as supplies for valve circuits, the situation is different. That`s why we decided to design this simple regulator that can cope with these voltages. This circuit is obviously well....
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This Chip from TI is simple to accommodate into your designs and this band-aid is acceptable for assembly of lighting gadgets, actuality a constant affection and anticipated achievement is calmly obtained. The absolute ambit consists of the ascendancy IC,....
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The alarm may be used for a variety of applications, such as frost monitor, room temperature monitor, and so on. In the quiescent state, the circuit draws a current of only a few microamperes, so that, in theory at least, a 9 V dry battery (PP3, 6AM6,....
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This is the FSK modulation circuit composed of 74LS74. The FSK modulation circuit has neither PLL nor bandpass filter with high Q value, so there is no need of any tune adjustment in the high-frequency modulation circuit. The 2 tune circuits composed of L1,....
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All LED`s Negatives are a connection to the "COM" pad, than through a 220 Ohm resistor to Ground. No Need for other "current limiting" resistors, even with supply voltages up to 16 volts. ) ..
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The choice of IF is usually determined from availability of filters with desired characteristics. For communication receiver or transceiver the requirements for main selective element are very high, and usually two types of filters are used:....
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Clock timer uses a PIC16F628 microcontroller to display 3 and 1/2 digit time and control an external load. The clock includes a calendar with leap year and optional daylight savings adjustments. The timer output can be set from 1 to 59 minutes and manually....
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This is a simple water level indicator circuit or water level sensor circuit. The circuit is very easy to build and contains only three PNP transistors and some other components. This is a very useful circuit to detect the level of water in the tank. The....
This is a very versatile voice modulator circuit using IC HT8950A from Holtek Semiconductors. The IC is capable of creating 7 upward or downward steps on the frequency of the input voice at a rate of 8Hz. There is also two special variation effects namely....
Amateur laser construction basic information on the construction of various types of lasers from scratch including: home-built laser safety, setting up a home laser lab, sources of supplies and chemicals, vacuum systems, glass working, structural materials,....
SCC3 12 Volt 20 Amp Solar Charge Controller. A kit with the circuit board and parts for this circuit is available from CirKits. SCC3 - 12 Volt 20 Amp Solar Charge Controller (C) G. Forrest Cook June...
Normally home appliances are controlled by means of switches, sensors, etc. However, physical contact with switches may be dangerous if there is any shorting. The circuit described here requires no physical contact for operating the appliance. You just need....
A circuit of an off-line telephone tester which does not require any telephone line for testing a telephone instrument. The circuit is so simple that it can be easily assembled even by a novice having very little knowledge of electronics. A telephone line....
Negative video plus iff signals are inserted at grid, while range strobe, from cathode output of blocking oscillator, is applied to cathode. -NBS, "Handbook Preferred Circuits Navy Aeronautical Electronic Equipment, " Vol. 1, Electron Tube Circuits, 1963, p....
A Digital Clock can be made easily by using PIC Microcontroller, DS1307 and a 16G—2 LCD. I have already posted about Interfacing DS1307 RTC with PIC Microcontroller. The DS1307 RTC can work either in 24-hour mode or 12-hour mode with AM/PM indicator. It....
Phase Locked Loop (PLL) Operating Principle with block diagram showing Phase Detector, Voltage Controlled Oscillator, Low Pass Filter....
The TEA5711 is a high performance Bimos IC for use in AM/FM stereo Radios All necessary functions are integrated: from AM and FM front-end to AM detector and FM stereo output stages. ..
Here is a simple LED blinker or flasher for decoration purpose. The 20 High bright LEDs flashes alternately giving a brilliant colour display. The circuit....
Briefly, the circuit works as follows; the clock signal drives 4 D-flipflops in the control section which store the on/off state of each of the current directions for the two stepper motor coils. The flipflops comprise a FSM (finite state machine) which....
The following figure shown an example of a three-output flyback regulator built using LM2577 that has electrical isolation between the input and output voltages. The values shown in the circuit diagram will be 5V for the voltage. An electrical isolation is....
The first was interested in a flexible preamp for use with a high-end acoustic guitar with piezo-electric bridge pickup, and the second wanted a preamp for use with a guitar emulator, to provide add someof the warmth that vacuum valves can provide. Both of....
Since the ultrasonic receiver used in this circuit is one designed to vibrate optimally at about 40 kHz, the transmitter paired with this receiver must also transmit 40 kHz waves. When these waves hit the receiver, the receiver vibrates and produces electric....
This is a small general purpose audio test set. It comprises a low 0. 3% distortion phase shift oscillator and a level meter. The level meteris set at 100mV FSD and can be used for gain measurements and general testing. Current consumption is just under 4mA.....
This receiver covers 8.5 to 11.5 MHz in two bands and has a sensitivity of under 1 ?V. Nn NE602 mixer feeds a 455-kHz IF amplifier (Q1 and Q2), detector D4, and audio amplifier IC2. Q4 serves as an AGC amplifier coil data is given in the table. The LO is....
Hey! It`s another ESQ-1 repair thread! I got an ESQ-1 tonight for a very good price, and I totally expected it to have a few issues. And it`s got them....
This is a simple SCR based burglar alarm circuit. Its features include automatic Exit and Entry delays - together with a timed Bell Cut-off and Reset. The basic alarm has a single zone. This will be adequate in many situations. However - the modular design....
How to build a MIDI interface to connect a SB/SB Pro/SB16 sound card joystick port to a MIDI capable musical instrument....
This figure shows the schematic diagram of the simple inductance meter. U1, a 74LS00 two-input quad NAND gate logic integrated circuit, two resistors, a capacitor, and a surplus microprocessor crystal form a stable crystal oscillator near the marked....
If you are working at frequencies of the order of 850MHz to 4GHz andnd that a frequency multiplier is required, the HMC 187, HMC 188 and HMC 189 (see table) frequency doubler may be just the solution you are looking for. The isolation performance of these....
This design allows to operate two intercom stations leaving the operator free of using his/her hands in some other occupation, thus avoiding the usual push-to-talk operation mode. No complex changeover switching is required: the two units are connected....
An equalizer is a device that allows you to adjust the gains of individual frequencies. You may want to lower bass, so on an equalizer, you would go to the frequency range of bass, which may be around 500Hz and turn down the volume. If you want to increase....
The post explains a simple delay ON circuit which allows the connected load at the output to be switched ON with some predetermined delay after power switch ON. The explained circuit can be used for all applications which calls for an initial delay ON....
The beacon controller is intended to be operated for telemetering data available on board of the VUSAT in Morse code so that the ham radio operator can decode the info without any costly and complex equipment. The design strictly follows the KISS concept. It....
Small and very useful circuit, Can be built on a veroboard Volt regulators such as the LM708, and LM317 series (and others) sometimes need to provide a li....
This circuit shows about 300-350W Lighting Control Circuit Diagram . Features: Cheap to build, Simple circuit, 120V AC voltages. Component: ....
Acoustic spectrum is extended by the 20Hz frequency is very low and reaches as high frequency 20000Hz. In the low frequency is lowered sense of direction. This reasoning leads us to attribute to the speaker`s use of very low frequency. Making it to you we....
The ATA5743 is a multi-chip PLL receiver device supplied in an SSO20 package. It has been especially developed for the demands of RF low-cost data transmission sys- tems with data rates from 1 kBaud to 10 kBaud in Manchester or Bi-phase code. The receiver is....
The pulse width of the compact pulse cum frequency modulator can be varied by altering the change-over point of comparator IC1 with a control voltage via resistor R1. The hysteresis of the IC is determined by resistors R3 and R4. The control voltage also....
As the continuous growth of global vehicle production and owned, the problems brought by vehicles are conspicuousness day after day. These problems are much more serious in China. Thus developing zero emission electric vehicles have become the main....
The application circuit shown in the picture below with output voltage higher thanreferenced voltage is composed of the W723 multi-port adjustable positive stabilizer. There is current limiting protectionin this circuit and the output voltage is adjustable....
The following circuit diagram is a simplified application circuit of the TDA8932B/33(B) device when operated from an asymmetrical supply (single supply)....
The circuit includes a shift register chip (74HC595N), which I couldn`t find on CircuitLab. Is there any specific drawing to represent a shift register on a schematic I can`t help you with circuitlab, but if you just want a schematic picture, you can take a....
The ICM7226 is a fully integrated Universal Counter and LED Display driver. It combines a high frequency Oscillator a decade timebase Counter an 8-decade data Counter and Latches a 7-segment decoder, digit multiplexer and segment and digit drivers which CAN....
LED message system on a Strida folding bicycle wheel After I`ve bought my strida folding bicycle, one of the first things I`ve done was to check out instru....
It started out as a simple unenclosed variac (variable autotransformer) and electrical outlet mounted on a block of wood. I eventually put it in the case of what used to be an old audio signal generator for safety and appearance. Among the other added....
This egg timer, which is both simple and functional, shows once again that it is not essential to use a microcontroller for everything these days. The circuit consists of only two ICs from the standard 4000 logic family, a multi-position rotary switch and a....
This photoelectric smoke detector circuit uses one LED and 2 LDRs to detect the smoke and sound an alarm. The LM1801 IC is the best choice for this circuit....
This rf amplifier ensure the power you need to boost a small transmitter. Depending of input rf power, power supply and transistor, this amplifier can boos....
The circuit, is a comparator, can measure with step of 1Volt, the voltage of battery of car. The clue of voltage become after comparison of voltage of battery, that is applied in the inverting inputs of amplifiers, with voltages of reference that are....
The circuit described here can create three different US-style` siren sounds: police, ambulance and fire engine. The desired sound can be selected using switch S1. The circuit can be used in toys (such as model vehicles), as part of an alarm system, and in....
The article describes a simple method of making an incremental LED bar graph by using the IC 4017, which is rather equipped with specifications not suiting the present functions. Let`s learn how we can mod the IC for the operations. Here we study an easy....
The afterward diagram is the four bandage blaster circuit. Blaster is about acclimated to advance the allegiance of sound, to accent assertive instruments, to abolish causeless noises, or to actualize absolutely new and altered timbres..
The LT3754 16 channel LED driver with a step-up DC DC controller designed by Linear Technology is capable of driving up to 45V of LEDs. Each channel of the LT3754 led driver contains an accurate current sink with ±2. 8% current matching. ..
When the carrier level is adequate to switch the cross-coupled pair of differential amplifiers, the modulation signal, which has been applied to the gate, will be switched at the carrier rate, between the collector loads. When switching occurs, it will....
Infrared transmitter and receiver circuit shown in the schematic diagram below can be used as remote control. The transmitter is basically an oscillator circuit, and the frequency can be adjusted using R1 potentiometer (or trimmer pot). This oscillation....
Color sensor circuit which can sense eight colors, i.e. blue, green and red (primary colors); magenta, yellow and cyan (secondary colors); and black and white...
Here is a simple LED night light circuit which can be used as a room night lamp. The circuit is simple and can be built with few components. The circuit is using four LEDs to perform as a night lamp. You can use blue or white colour LEDs or any other colour....
A Light Dependent Resistor (LDR) to create a simple childrens bedroom nightlight which turns on automatically when it gets dark and turns off when it gets light. An LDR`s resistance changes depending upon the amount of light hitting the sensor. For the LDR....
Army Radio Sales Co. specialises in military communications equipment for the ham radio operator or collector. Military Radios From Many Countries For Sale, We Buy and Swap Military Radios and Accessories....
This multitone electronic siren is useful for burglar alarms, reverse horns, etc. It produces five different audio tones and is much more earcatching than a single-tone siren. The circuit is built around popular CMOS oscillator-cum-divider IC 4060 and small....
The Dynaco Mark III is the highest power amplifier that was widely sold under the dyna name. There was a nigher power amp (the Mark VI), but it wasn`t widely available. The Dyna MKIII has a basic design flaw that none of the other Dynaco products have. The....
BD237 datasheet, .Selling leads from all over the world, ChinaICMart is the world`s biggest IC trading marketplace on the internet. We offer finest suppliers for BD237, you can also download the datasheet for BD237...
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...
The signal from a synchro receiver or a variable resistive cam follower (potentiometer) is boosted by operational amplifier U1, whose output swing is limited by back-to-back zeners D3 and D4. The signal is then applied to operational amplifiers U2 and U3,....
I dont claim circuit can test all bad mosfets or all fault mosfet conditions. If mosfet is working it will operate in the astable multivibrator circuit causing the Led to flash...
The Schematic has three main parts to it. The Sensor Circuitry where the accelerometer is wired up to the A/D converters. The second part is the power circuit where we have the On/Off switch, the 3. 7v battery & +5v 7805 Voltage Regualtor. The 3rd part of....
Using the LM1458 IC number to expand the difference of the input signal left (L). It came out as surround sound sure enough. When raising the power and enter the left and right input circuit. The signal on the left (L) to signal coupling through C2 and R1 to....
The main reason to go to the trouble and expense of running trains on battery power is to avoid cleaning or even wiring the track. The issues of track cleaning really can be a big deal. Adding radio control to a battery power system adds the capability of....
What is a servo? A servo is a small motor that you can position at any angle very accurately. It contains internal circuits that will automatically maintain....
This circuit is a ultra low noise magnetic phono preamp. This circuit uses an LM381/1A. This circuit also includes RIAA equalization. This circuit has ultra....
This circuit can be used for an assist in parking the car near the garage wall backing up Pls. LED D7 illuminates Pls bumper-wall distance is about 20 cm. , D7 + D6 illuminate at about 10 cm. and D7 + D6 + D5 at about 6 cm. In this manner you are alerted Pls....
This circuit shows about LM741 Ham Radio Circuit Diagram. Features: including AM, FM, 7 MHz SSB Transceiver, FSM, Dummy load, DSB transmitters, ....
This is a color sensor Circuit Diagram. This circuit will sense 8 colors that are:, green, red and blue ; magenta, cyan and yellow ; and black and white. It`s will be very useful for robotics project. The object whose colour is required to be detected should....
An Intergrated ircuit is just that. an intergrated circuit. These small packages combine many individual components to perform a specific function. They vary in shape and size depending on their complexity. They are categorised into functions like Audio,....
IC Voltage Regulators -Circuit diagram & Block diagram of Linear,Fixed, Adjustable (positive & negative) & Switching voltage regulators....
Schematic, breadboard photo, parts list, and results of several transistor variations on the classic bipolar hbridge motor driver circuit....
An Armstrong Oscillator is a type of oscillator that uses a tickler coil which provides feedback from tank circuit. The Armstrong Oscillator is used to produce a sine-wave output of constant amplitude and of fairly constant frequency within the rf range.....
The purpose of this project is to construct a computer that uses the combined computational power of many microcontrollers (MCUs). All the MCUs cooperate to solve one problem. The computer is defined as parallel processing machine and the algorithms that....
There are many circuits for low voltage regulators. For higher voltages, such as supplies for valve circuits, the situation is different. That`s why we decided to design this simple regulator that can cope with these voltages. This circuit is obviously well....
This Chip from TI is simple to accommodate into your designs and this band-aid is acceptable for assembly of lighting gadgets, actuality a constant affection and anticipated achievement is calmly obtained. The absolute ambit consists of the ascendancy IC,....
The alarm may be used for a variety of applications, such as frost monitor, room temperature monitor, and so on. In the quiescent state, the circuit draws a current of only a few microamperes, so that, in theory at least, a 9 V dry battery (PP3, 6AM6,....
This is the FSK modulation circuit composed of 74LS74. The FSK modulation circuit has neither PLL nor bandpass filter with high Q value, so there is no need of any tune adjustment in the high-frequency modulation circuit. The 2 tune circuits composed of L1,....
All LED`s Negatives are a connection to the "COM" pad, than through a 220 Ohm resistor to Ground. No Need for other "current limiting" resistors, even with supply voltages up to 16 volts. ) ..
The choice of IF is usually determined from availability of filters with desired characteristics. For communication receiver or transceiver the requirements for main selective element are very high, and usually two types of filters are used:....
Clock timer uses a PIC16F628 microcontroller to display 3 and 1/2 digit time and control an external load. The clock includes a calendar with leap year and optional daylight savings adjustments. The timer output can be set from 1 to 59 minutes and manually....
This is a simple water level indicator circuit or water level sensor circuit. The circuit is very easy to build and contains only three PNP transistors and some other components. This is a very useful circuit to detect the level of water in the tank. The....
