New Circuits Page 146
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This circuit came out of some work I did for the two antenna analysers which are described elsewhere on this site. Those instruments both include an RF signal generator. This is used as the signal source to drive the impedance bridge and detectors used to....
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-
For all measurements with the oscilloscope, use the oscilloscope probe with the 10:1 attenuation to minimize measurement errors due to the capacitance of coaxial cable and the input resistance of the oscilloscope. Problem 1. The goal of this problem is to....
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This is a very simple yet effective circuit in which the equipments connected at the so called trailing sockets will run only if the equipment connected at the control socket is switched on. For example, let`s connect a motor is connected to the control....
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-
This simple heat sensor circuit could senses heat from various electronics device like computer, amplifier etc. and generate warning alarm. It could senses heat from environment also, but here I mention electronics device because it is being using mostly....
-
-
This sketch sends an ASCII A (byte of value 65) on startup and repeats that until it gets a serial response from the computer. Then it sends three sensor values as single bytes, and waits for another response from the computer. You can use the Arduino serial....
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The circuit is so simple that there is little to say about it, but it gives very good results. Tr1 is operated in grounded base mode with input to its emitter to give low impedance input. The values shown give correct operation from 9v. If operating from....
-
IR illuminator for night-vision tv cameras and scopes. This source uses LEDs and an astable oscillator to control the switch, duty-cycle, and effective IR illumination output..
-
-
This is a simple XTal tester circuit. T1 and XTal have formed an oscillator. C1 and C2 are voltage divider for oscillator. if the XTal is safe, the oscillator will work well and its output voltage will be rectified by C3, C4, D1 and D2, then T2 will run and....
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The Proximity Camera Head (A2047) is a Long-Wire Data Acquisition ( LWDAQ ) Device that reads out a TC255P image sensor. It is a radiation-tolerant descendent of the Inplane Sensor Head ( A2036 ). We use the A2036 and A2033 most often with the LWDAQ....
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An amplifier to go with an antique Meissner AM High Fidelity tuner that I had restored. But by the time the amp was finished it sounded so good that it has become my amp of choice for listening to CDs while working in the shop. The only parts purchased new....
-
-
LCD segment number growth increases the pin number of package in LCD driver. The LCD driver IC with key-scan function makes the burden of microprocessor light. But it increases the pin number more, and it is difficult to be mounted in the board for large IC.....
-
-
This EEPROM programmer reads, writes and erases 24C EEPROM devices. It has a PC serial port interface. The programmer needs 5VDC power supply. It can read or write one page (16 bytes) at a time by programming the page with a terminal program such as....
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Just about any power transistor can be used in this megaphone. Its suitable for boats, playing fields etc. the transistors Q1 & Q2 are the HEP-230 type which are easily available in the market. The transistors are parallely connected to handle the required....
-
Once you have compiled your C or C+ program into an AVR binary using AVR-GCC, you will need to "burn" it to the chip itself. This can be done with one of three applications: AVRDUDE, UISP, or AVR Studio. In order to actually get one of those applications....
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-
Booster for audio circuit diagram. Potentiometer R5 of 100K is a linear type with an on/off switch attached. The value of C1 may need to be between 0. 05 µF and 0. 1 µF (47nF/100nF). Experiment with the value for best performance. This is a20 watts audio....
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and I think I understand what`s going on. the induction coil senses the magnetic field flux around when the phone calls, boosts the signal, and pulses the LED. These types of circuits were meant to have the phone sitting on the pickup coil. The emf from the....
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This audio amplifier designed uses two LM3886 per channel, in parallel circuit, based on the PA100 parallel amplifier detailed in National Semiconductors application note - AN1192. This amplifier can deliver about 50W into a 8-ohm speaker and 100W into a....
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In my previous post of capacitive touch switch, it gives the o/p as long as you touch it. Means it was only drive the load when you touch it, and when you remove your hand/finger then it was not able to drive the load. Tough that touch switch circuit can be....
-
How can we rotate a DC motor in clockwise and anti clockwise directions Or how can we rotate a motor in forward and reverse direction These are the popular question asked by many of the robotic beginners. DC Motor (control) driver circuits are the essential....
-
This is a simple type remote control by using RF communication without microcontroller. In this project a remote has been designed for various home appliances like television, fan, lights, etc. It gives lot of comfort to the user since we can operate it by....
-
Add a cheap stopwatch to this circuit to produce an accurate reaction timer. The circuit is wired in parallel with the start/stop button in the watch via a 2. 5mm socket, which fits snugly in one corner of the casing. The person conducting the test (the....
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This is a guest post by Olger Groen . If you would like to write for ExtremeCircuits, then drop us an email via contact form or simply comment. A long tim....
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The purpose of this experiment is to discover the properties of a nonlinear circuit which closely approximates a driven pendulum. It`s a great introduction to nonlinear phenomena such as period doubling and chaos. "Chaotic States and Routes to Chaos in the....
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In single phase AC induction motors, often used in fridges and washing machines, a start winding is used during the starting phase. When the motor has reached a certain speed, this winding is turned off again. The start winding is slightly out of phase to....
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Varying Brightness AC Lamp Circuit, an SCR is used to slowly vary the intensity of a 120 volt light bulb by controlling the time that the AC line voltage is applied to the lamp during each half cycle. The circuit is directly connected to the AC power line....
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-
The design changes were primarily chosen to improve weight of the system. The majority of weight savings were due to having a single board design, switching to single battery operation and mounting the battery directly on the PCB. Other small weight....
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This circuit is an improved version of the circuit shown in Fig. 8-21. The hysteresis effect is eliminated by the addition of two diodes and the 5.1 -k? resistor. The RC network across the triac is a snubber to prevent line transients from accidentally....
-
-
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....
-
The TDA3567 is a monolithic integrated decoder for the NTSC colour Television standards. It combines all functions required for the demodulation of NTSC signals. Further more it contains a luminance Amplifier an RGB-matrix and Amplifier These Amplifiers....
-
Crowbar circuits are so-called because their operation is the equivalent of dropping a crowbar (large steel digging implement) across the terminals. It is only ever used as a last resort, and can only be used where the attached circuit is properly fused or....
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-
It is not the purpose of this folio to accommodate a abundant account of the IC`s acclimated by this circuit. If you appetite added advice on this accountable amuse accredit to the Flip-Flop Made With A LM556 Timer Chip folio in the assorted circuits area of....
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This is my long history the device that controls my home`s night light, air-conditioner, etc. The device is a Miniature Real-time Controller. The circuit uses only three chips, a 89C2051, DS275(or MAX232), and 74LS07 open collector driver. The scheduler for....
-
Nowadays the most commonly available headphones have an impedance of 2 G— 32 ©, this relatively low value makes them unsuitable for such a design. However, with a bit of crafty transformation these headphones can be used in just such a design. To adapt them,....
-
In appliance that appeal for aerial current, Nicad (NiCd) rechargeable array still has the angry achievement compared to NiMH and Lithium battery. The charger ambit actuality is acute in the way it handle the amiss polarity of the array placement. The core....
-
A "talking" computer is not necessarily expensive - not if you mate one of the low-cost computers (Sinclair ZX-80, ZX-81, or Timex 1000) with Texas Instruments popularly priced "Speak & Spell" learning device. The combination give you several hundred clearly....
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I got myself a Super GameBoy today, but I noticed that the sound pitch is notably higher than an original GameBoy(CPU clock frequency doesn`t match between the Super GameBoy and GameBoy "Brick," 4.194304 MHz for the "Brick" and 4.295454 MHz for the Super....
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The servo motor have many utilizes in everything from robotics to puppetry to photography and beyond. These tiny motors can position their output shaft to any position on command and hold that position. Most servos possess a range of motion to about 210....
-
An LED is an electronic component or semiconductor to be more precise. This means that it is neither a conductor (something that conducts electricity) or insulator (something that does not conduct electricity) - it is something in between. LED is an acronym....
-
The last section presented a number of basic free-air laser light communications projects. You learned how to modulate a He-Ne laser beam using a transformer, transistor, and even a piece of Mylar foil stretched in a needlepoint hoop. You also learned....
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The high durability nature of a light emitting diode (LED) make it suitable for ON/OFF indicator application. Because the limitation on low operating voltage,...
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This is a simple audio sound level LED display circuit diagram. The circuit is completely based on a single ic LM3915 from National Semiconductor. The LM3915 is a monolithic integrated circuit. It displays the audio sound level in terms of 10 LEDs and....
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Capacitance multiplier simulate high capacitance capacitor for analog signal signal processing. By using DAC (Digital-to-Analog Converter), we can simulate....
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With a few basic hand tools and a digital camera, this programmable camera controller project is for you. By using components already available at home, costs may be kept to a minimum. A servomotor may be reused from a radio-controlled model and aluminium....
-
Hi folks. I`m new to the forum and relatively new to diy electronics. My current project involves trying to make a battery-powered LED dimmer circuit. ....
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Using an AMI chip P/N S2561, this telephone ringer can be powered line. Audio output is about 50 mW when powered from a 10-V source....
-
More and more equipment is sold that runs off internal rechargeable batteries. Although a matching charger is usually supplied in the package, there are a....
-
The circuit below illustrates using a 10x10 matrix to sequence up to 100 LEDs with just three ICs and 20 transistors. The two 4017 decade counters control the 10 rows and 10 columns so that one LED is selected depending on the output of the decade counters.....
-
In the first, voltage from AC 220V or 110V entered to the transformer and will be lowered into 12V AC. And then AC voltage will be rectified by 4 diode or you can use bridge diode to the DC voltage. And the DC voltage output will be filtered by Condesator....
-
-
This circuit controls a Searchlight type signal head and produces solid - RED, YELLOW or GREEN indications. The signals can be connected for NORMAL or APPROACH type lighting of the Green signal. The circuit uses a LM556 - Dual Timer IC in a complimentary....
-
Much evidence indicates that specific communications and energies DO exist outside the conventional electromagnetic spectrum of which our finest examples may be....
-
This timer was designed for people wanting to get tanned but at the same time wishing to avoid an excessive exposure to sunlight. A Rotary Switch sets the timer according to six classified Photo-types (see table). A Photo resistor extends the preset time....
-
This simple alarm circuit was designed for use in a combined garage and rumpus room. It can be assembled on Veroboard and uses just one IC plus a handful of cheap components. The circuit is based on a straightforward 555 timer circuit (IC1). This is wired as....
-
It is 8-Bit, Microprocessor-Compatible, A/D Converters. Data Collection Analog to Digital Conversion and Communicating and It uses an ADC0804 chip to convert from analog to digital, an AT89C2051. The ADC0802 families are CMOS 8-Bit, successive-approximation....
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-
-
The block diagram below shows how the removable memory card or MMC card connection to other corresponding components. Since the memory card has two signal function operations, the SD mode and SPI mode, the SD mode indicates that all pins of the memory card....
-
This is a complete alarm system with 5 independent zones suitable for a small office or home environment. It uses just 3 CM IC`s and features a timed entry / exit zone, 4 immediate zones and a panic button. There are indicators for each zone a system armed ....
-
It`s a miniature 10/100-MbBit Ethernet module that includes an integrated microcontroller. Price is less than $60 a pop. With its minimal dimensions of 1. 38-in. x 2. 16-in. (34. 5-mm x 54-mm) the communications module can be used for compact designs such as....
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Metal detector schematic circuit using CS209A and few electronic components..
-
-
Hi Guys, Relatively new electronics newbie here - so thanks for your help Recently I purchased several electromechanical seven segment vane displays....
-
Jumping ahead just a little The YouTube video below illustrates how quickly and easily the system is set up at the launch site My to....
-
Software delay routine in 8051 for generating different time delays. Sine wave generator circuit using software delay in 8051. AT89C51 is the microcontroller used in this project....
-
The ATA5760 ATA5761 is a multi-chip PLL receiver device supplied in an SO20 pack- age. It has been especially developed for the demands of RF low-cost data transmission systems with data rates from 1 kBaud to 10 kBaud in Manchester or Bi-phase code. The....
-
Closed Loop Motor Control Closed loop (servo) control is used to make a constant speed motor control. Constant speed means that the speed of the motor will be...
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-
-
You are here: Btechzone | Job Updates | JNTU Updates » Basics, Electronics, Projects » ECE Mini & Major Project on Vehicle Tracking System using GPS and GSM modem Warning: Missing argument 2 for wpdb::prepare(), called in....
-
This circuit has an adjustable output timer that will re-trigger at regular intervals. The output period can be anything from a fraction of a second to half-an-hour or more - and it can be made to recur at regular intervals of anything from seconds to days....
-
-
How to make the tally light work on the F15 camera viewfinder when you don`t have the CCU/RCU....
-
A detailed DIY remote controlled AC Fan regulator with 10 stage speed control. Made with ATmega8, full source code and PCB Layout....
-
The goal of this project is to create a device that is capable of outputing VGA signals to a CRT monitor inorder to display figures, text and characters. T....
-
A high brightness LED evaluation board has been developed using the Fairchild Semiconductor FAN7554D PWM controller..
-
This circuit is especially designed for those who often need to wake up early in the morning. Ordinary alarms in electronic watches are not loud enough and very often they fail to wake up. The switch circuit described here will come handy; it can be used to....
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This circuit is basically the same as the channel LED sequencer with the addition of solid state relays to control the AC lamps. The relay shown in the diagram is a Radio Shack 3 amp unit (part no. 275-310) that requires 1.2 volts DC to activate. No current....
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Well i posted a similar circuit in another topic but a lot has changed in the design. So here is a brief story of what i am doing, actually i am in a project where i have to design a circuit which can be used to trigger solenoid valves for the airbags in the....
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This battery level indicator offers (5) LEDs that light up progressively as the voltage increases: Red: Power Connected (0%) Yellow: Greater than 10.5V (25....
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Those days when I come home at night and strait into the darkness are finally over. This is a very practical device and I built it so that it is a module t....
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Doppler units are the "weapon of choice" among mobile T-hunters in many parts of the country. They indicate the direction of incoming VHF signals on a circular ring of light-emitting diodes or a digital display. A doppler set updates bearings almost....
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In few previous post, I showed schematic for interfacing Keypad and LCD using 8051 architecture. This blog post shows complete implementation of the interface using AT89S51 Micro-controller with programming in assembly. Considering that one understands the....
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Composed of MAX1802 multiple output digital camera power supply circuit diagram is shown as below. MAX1802 Chip has 2 buck converters and 3 boost converters. Input voltage 2.5?11V, continuously adjustable output voltage 2.7?5.5V. The lowest output voltage....
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Light Sensitive Staircase Switch with Triac , Operation of the third circuit is much similar except that it has photo sensitivity. The circuit is shown in Schematic When there is no sufficient l....
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This 220 Volt disco lamp circuit is not a voice switch (VOX), because this circuit is too dumb to differentiate between musical sound and human voice. This is more of a voice-activated sound activated. An interesting application is to control the lighting in....
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The ammeter measures electric current. It may be calibrated in amperes, milliamperes, or microamperes. In order to measure current, the ammeter must be placed in series with the circuit to be tested (Figure 1). When an ammeter is placed in series with a....
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Here is the variable high voltage dc power supply circuit, which we can customize the output voltage from 0 to 311Vdc, and it is protected the current over limit that we define at about 100 mA. The power MOSFET Q1 is controlled the current output, with using....
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Here`s an inexpensive electronic circuit that you can build to put in your Jack-o`lantern. It provides power to drive a few LEDs at night, and automatically turns them off during the daytime. It`s a simple and automatic dark-detecting circuit that you can....
This circuit came out of some work I did for the two antenna analysers which are described elsewhere on this site. Those instruments both include an RF signal generator. This is used as the signal source to drive the impedance bridge and detectors used to....
For all measurements with the oscilloscope, use the oscilloscope probe with the 10:1 attenuation to minimize measurement errors due to the capacitance of coaxial cable and the input resistance of the oscilloscope. Problem 1. The goal of this problem is to....
This is a very simple yet effective circuit in which the equipments connected at the so called trailing sockets will run only if the equipment connected at the control socket is switched on. For example, let`s connect a motor is connected to the control....
This simple heat sensor circuit could senses heat from various electronics device like computer, amplifier etc. and generate warning alarm. It could senses heat from environment also, but here I mention electronics device because it is being using mostly....
This sketch sends an ASCII A (byte of value 65) on startup and repeats that until it gets a serial response from the computer. Then it sends three sensor values as single bytes, and waits for another response from the computer. You can use the Arduino serial....
The circuit is so simple that there is little to say about it, but it gives very good results. Tr1 is operated in grounded base mode with input to its emitter to give low impedance input. The values shown give correct operation from 9v. If operating from....
IR illuminator for night-vision tv cameras and scopes. This source uses LEDs and an astable oscillator to control the switch, duty-cycle, and effective IR illumination output..
This is a simple XTal tester circuit. T1 and XTal have formed an oscillator. C1 and C2 are voltage divider for oscillator. if the XTal is safe, the oscillator will work well and its output voltage will be rectified by C3, C4, D1 and D2, then T2 will run and....
The Proximity Camera Head (A2047) is a Long-Wire Data Acquisition ( LWDAQ ) Device that reads out a TC255P image sensor. It is a radiation-tolerant descendent of the Inplane Sensor Head ( A2036 ). We use the A2036 and A2033 most often with the LWDAQ....
An amplifier to go with an antique Meissner AM High Fidelity tuner that I had restored. But by the time the amp was finished it sounded so good that it has become my amp of choice for listening to CDs while working in the shop. The only parts purchased new....
LCD segment number growth increases the pin number of package in LCD driver. The LCD driver IC with key-scan function makes the burden of microprocessor light. But it increases the pin number more, and it is difficult to be mounted in the board for large IC.....
This EEPROM programmer reads, writes and erases 24C EEPROM devices. It has a PC serial port interface. The programmer needs 5VDC power supply. It can read or write one page (16 bytes) at a time by programming the page with a terminal program such as....
Just about any power transistor can be used in this megaphone. Its suitable for boats, playing fields etc. the transistors Q1 & Q2 are the HEP-230 type which are easily available in the market. The transistors are parallely connected to handle the required....
Once you have compiled your C or C+ program into an AVR binary using AVR-GCC, you will need to "burn" it to the chip itself. This can be done with one of three applications: AVRDUDE, UISP, or AVR Studio. In order to actually get one of those applications....
Booster for audio circuit diagram. Potentiometer R5 of 100K is a linear type with an on/off switch attached. The value of C1 may need to be between 0. 05 µF and 0. 1 µF (47nF/100nF). Experiment with the value for best performance. This is a20 watts audio....
and I think I understand what`s going on. the induction coil senses the magnetic field flux around when the phone calls, boosts the signal, and pulses the LED. These types of circuits were meant to have the phone sitting on the pickup coil. The emf from the....
This audio amplifier designed uses two LM3886 per channel, in parallel circuit, based on the PA100 parallel amplifier detailed in National Semiconductors application note - AN1192. This amplifier can deliver about 50W into a 8-ohm speaker and 100W into a....
In my previous post of capacitive touch switch, it gives the o/p as long as you touch it. Means it was only drive the load when you touch it, and when you remove your hand/finger then it was not able to drive the load. Tough that touch switch circuit can be....
How can we rotate a DC motor in clockwise and anti clockwise directions Or how can we rotate a motor in forward and reverse direction These are the popular question asked by many of the robotic beginners. DC Motor (control) driver circuits are the essential....
This is a simple type remote control by using RF communication without microcontroller. In this project a remote has been designed for various home appliances like television, fan, lights, etc. It gives lot of comfort to the user since we can operate it by....
Add a cheap stopwatch to this circuit to produce an accurate reaction timer. The circuit is wired in parallel with the start/stop button in the watch via a 2. 5mm socket, which fits snugly in one corner of the casing. The person conducting the test (the....
This is a guest post by Olger Groen . If you would like to write for ExtremeCircuits, then drop us an email via contact form or simply comment. A long tim....
The purpose of this experiment is to discover the properties of a nonlinear circuit which closely approximates a driven pendulum. It`s a great introduction to nonlinear phenomena such as period doubling and chaos. "Chaotic States and Routes to Chaos in the....
In single phase AC induction motors, often used in fridges and washing machines, a start winding is used during the starting phase. When the motor has reached a certain speed, this winding is turned off again. The start winding is slightly out of phase to....
Varying Brightness AC Lamp Circuit, an SCR is used to slowly vary the intensity of a 120 volt light bulb by controlling the time that the AC line voltage is applied to the lamp during each half cycle. The circuit is directly connected to the AC power line....
The design changes were primarily chosen to improve weight of the system. The majority of weight savings were due to having a single board design, switching to single battery operation and mounting the battery directly on the PCB. Other small weight....
This circuit is an improved version of the circuit shown in Fig. 8-21. The hysteresis effect is eliminated by the addition of two diodes and the 5.1 -k? resistor. The RC network across the triac is a snubber to prevent line transients from accidentally....
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....
The TDA3567 is a monolithic integrated decoder for the NTSC colour Television standards. It combines all functions required for the demodulation of NTSC signals. Further more it contains a luminance Amplifier an RGB-matrix and Amplifier These Amplifiers....
Crowbar circuits are so-called because their operation is the equivalent of dropping a crowbar (large steel digging implement) across the terminals. It is only ever used as a last resort, and can only be used where the attached circuit is properly fused or....
It is not the purpose of this folio to accommodate a abundant account of the IC`s acclimated by this circuit. If you appetite added advice on this accountable amuse accredit to the Flip-Flop Made With A LM556 Timer Chip folio in the assorted circuits area of....
This is my long history the device that controls my home`s night light, air-conditioner, etc. The device is a Miniature Real-time Controller. The circuit uses only three chips, a 89C2051, DS275(or MAX232), and 74LS07 open collector driver. The scheduler for....
Nowadays the most commonly available headphones have an impedance of 2 G— 32 ©, this relatively low value makes them unsuitable for such a design. However, with a bit of crafty transformation these headphones can be used in just such a design. To adapt them,....
In appliance that appeal for aerial current, Nicad (NiCd) rechargeable array still has the angry achievement compared to NiMH and Lithium battery. The charger ambit actuality is acute in the way it handle the amiss polarity of the array placement. The core....
A "talking" computer is not necessarily expensive - not if you mate one of the low-cost computers (Sinclair ZX-80, ZX-81, or Timex 1000) with Texas Instruments popularly priced "Speak & Spell" learning device. The combination give you several hundred clearly....
I got myself a Super GameBoy today, but I noticed that the sound pitch is notably higher than an original GameBoy(CPU clock frequency doesn`t match between the Super GameBoy and GameBoy "Brick," 4.194304 MHz for the "Brick" and 4.295454 MHz for the Super....
The servo motor have many utilizes in everything from robotics to puppetry to photography and beyond. These tiny motors can position their output shaft to any position on command and hold that position. Most servos possess a range of motion to about 210....
An LED is an electronic component or semiconductor to be more precise. This means that it is neither a conductor (something that conducts electricity) or insulator (something that does not conduct electricity) - it is something in between. LED is an acronym....
The last section presented a number of basic free-air laser light communications projects. You learned how to modulate a He-Ne laser beam using a transformer, transistor, and even a piece of Mylar foil stretched in a needlepoint hoop. You also learned....
The high durability nature of a light emitting diode (LED) make it suitable for ON/OFF indicator application. Because the limitation on low operating voltage,...
This is a simple audio sound level LED display circuit diagram. The circuit is completely based on a single ic LM3915 from National Semiconductor. The LM3915 is a monolithic integrated circuit. It displays the audio sound level in terms of 10 LEDs and....
Capacitance multiplier simulate high capacitance capacitor for analog signal signal processing. By using DAC (Digital-to-Analog Converter), we can simulate....
With a few basic hand tools and a digital camera, this programmable camera controller project is for you. By using components already available at home, costs may be kept to a minimum. A servomotor may be reused from a radio-controlled model and aluminium....
Hi folks. I`m new to the forum and relatively new to diy electronics. My current project involves trying to make a battery-powered LED dimmer circuit. ....
Using an AMI chip P/N S2561, this telephone ringer can be powered line. Audio output is about 50 mW when powered from a 10-V source....
More and more equipment is sold that runs off internal rechargeable batteries. Although a matching charger is usually supplied in the package, there are a....
The circuit below illustrates using a 10x10 matrix to sequence up to 100 LEDs with just three ICs and 20 transistors. The two 4017 decade counters control the 10 rows and 10 columns so that one LED is selected depending on the output of the decade counters.....
In the first, voltage from AC 220V or 110V entered to the transformer and will be lowered into 12V AC. And then AC voltage will be rectified by 4 diode or you can use bridge diode to the DC voltage. And the DC voltage output will be filtered by Condesator....
This circuit controls a Searchlight type signal head and produces solid - RED, YELLOW or GREEN indications. The signals can be connected for NORMAL or APPROACH type lighting of the Green signal. The circuit uses a LM556 - Dual Timer IC in a complimentary....
Much evidence indicates that specific communications and energies DO exist outside the conventional electromagnetic spectrum of which our finest examples may be....
This timer was designed for people wanting to get tanned but at the same time wishing to avoid an excessive exposure to sunlight. A Rotary Switch sets the timer according to six classified Photo-types (see table). A Photo resistor extends the preset time....
This simple alarm circuit was designed for use in a combined garage and rumpus room. It can be assembled on Veroboard and uses just one IC plus a handful of cheap components. The circuit is based on a straightforward 555 timer circuit (IC1). This is wired as....
It is 8-Bit, Microprocessor-Compatible, A/D Converters. Data Collection Analog to Digital Conversion and Communicating and It uses an ADC0804 chip to convert from analog to digital, an AT89C2051. The ADC0802 families are CMOS 8-Bit, successive-approximation....
The block diagram below shows how the removable memory card or MMC card connection to other corresponding components. Since the memory card has two signal function operations, the SD mode and SPI mode, the SD mode indicates that all pins of the memory card....
This is a complete alarm system with 5 independent zones suitable for a small office or home environment. It uses just 3 CM IC`s and features a timed entry / exit zone, 4 immediate zones and a panic button. There are indicators for each zone a system armed ....
It`s a miniature 10/100-MbBit Ethernet module that includes an integrated microcontroller. Price is less than $60 a pop. With its minimal dimensions of 1. 38-in. x 2. 16-in. (34. 5-mm x 54-mm) the communications module can be used for compact designs such as....
Metal detector schematic circuit using CS209A and few electronic components..
Hi Guys, Relatively new electronics newbie here - so thanks for your help Recently I purchased several electromechanical seven segment vane displays....
Jumping ahead just a little The YouTube video below illustrates how quickly and easily the system is set up at the launch site My to....
Software delay routine in 8051 for generating different time delays. Sine wave generator circuit using software delay in 8051. AT89C51 is the microcontroller used in this project....
The ATA5760 ATA5761 is a multi-chip PLL receiver device supplied in an SO20 pack- age. It has been especially developed for the demands of RF low-cost data transmission systems with data rates from 1 kBaud to 10 kBaud in Manchester or Bi-phase code. The....
Closed Loop Motor Control Closed loop (servo) control is used to make a constant speed motor control. Constant speed means that the speed of the motor will be...
You are here: Btechzone | Job Updates | JNTU Updates » Basics, Electronics, Projects » ECE Mini & Major Project on Vehicle Tracking System using GPS and GSM modem Warning: Missing argument 2 for wpdb::prepare(), called in....
This circuit has an adjustable output timer that will re-trigger at regular intervals. The output period can be anything from a fraction of a second to half-an-hour or more - and it can be made to recur at regular intervals of anything from seconds to days....
How to make the tally light work on the F15 camera viewfinder when you don`t have the CCU/RCU....
A detailed DIY remote controlled AC Fan regulator with 10 stage speed control. Made with ATmega8, full source code and PCB Layout....
The goal of this project is to create a device that is capable of outputing VGA signals to a CRT monitor inorder to display figures, text and characters. T....
A high brightness LED evaluation board has been developed using the Fairchild Semiconductor FAN7554D PWM controller..
This circuit is especially designed for those who often need to wake up early in the morning. Ordinary alarms in electronic watches are not loud enough and very often they fail to wake up. The switch circuit described here will come handy; it can be used to....
This circuit is basically the same as the channel LED sequencer with the addition of solid state relays to control the AC lamps. The relay shown in the diagram is a Radio Shack 3 amp unit (part no. 275-310) that requires 1.2 volts DC to activate. No current....
Well i posted a similar circuit in another topic but a lot has changed in the design. So here is a brief story of what i am doing, actually i am in a project where i have to design a circuit which can be used to trigger solenoid valves for the airbags in the....
This battery level indicator offers (5) LEDs that light up progressively as the voltage increases: Red: Power Connected (0%) Yellow: Greater than 10.5V (25....
Those days when I come home at night and strait into the darkness are finally over. This is a very practical device and I built it so that it is a module t....
Doppler units are the "weapon of choice" among mobile T-hunters in many parts of the country. They indicate the direction of incoming VHF signals on a circular ring of light-emitting diodes or a digital display. A doppler set updates bearings almost....
In few previous post, I showed schematic for interfacing Keypad and LCD using 8051 architecture. This blog post shows complete implementation of the interface using AT89S51 Micro-controller with programming in assembly. Considering that one understands the....
Composed of MAX1802 multiple output digital camera power supply circuit diagram is shown as below. MAX1802 Chip has 2 buck converters and 3 boost converters. Input voltage 2.5?11V, continuously adjustable output voltage 2.7?5.5V. The lowest output voltage....
Light Sensitive Staircase Switch with Triac , Operation of the third circuit is much similar except that it has photo sensitivity. The circuit is shown in Schematic When there is no sufficient l....
This 220 Volt disco lamp circuit is not a voice switch (VOX), because this circuit is too dumb to differentiate between musical sound and human voice. This is more of a voice-activated sound activated. An interesting application is to control the lighting in....
The ammeter measures electric current. It may be calibrated in amperes, milliamperes, or microamperes. In order to measure current, the ammeter must be placed in series with the circuit to be tested (Figure 1). When an ammeter is placed in series with a....
Here is the variable high voltage dc power supply circuit, which we can customize the output voltage from 0 to 311Vdc, and it is protected the current over limit that we define at about 100 mA. The power MOSFET Q1 is controlled the current output, with using....
Here`s an inexpensive electronic circuit that you can build to put in your Jack-o`lantern. It provides power to drive a few LEDs at night, and automatically turns them off during the daytime. It`s a simple and automatic dark-detecting circuit that you can....
