New Circuits Page 67
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When both S1 and R2 are on, current flows through each of the lamps, which are connected to the rheostat in. parallel. The amount of current flow and thus the intensity of illumination can be controlled by varying the effective the batteries because the....
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-
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the moving message will be display on the LCD which will be controlled through microcontroller and the message will be sent by computer using RS232. The circuit diagram of the moving message display is shown in this post and how the whole process is....
-
Arduino is an open-source electronics prototyping platform based on flexible, easy-to-use hardware and software. It`s intended for artists, designers, hobbyists, and anyone interested in creating interactive objects or environments. Arduino can sense the....
-
This type of infrared proximity circuit is widely used as an electric switch where physical contact is not desired for hygiene purpose. For example, we commonly see use of infrared proximity sensors on public drinking fountains and in public washrooms. The....
-
A keypad enters a four-digit access code, which is programmed via jumpers on a 24-pin plug-in header and socket. U1 is an LST220, which detects a four-digit sequential data input. When the correct data is entered into the keyboard, pin 13 of U1 goes high,....
-
-
You can cut away the 555 timer oscillator part and add your favorite microphone modulating circuit to transmit voice over to your tv set with a little tuning. Schematics in Schematics Depot were found on the internet and assumed to be in public domain.....
-
Voltage Regulators low ability burning IC 78W alternation acclimated in our chart is now so bargain they are an economical another to simple regulators NPN-stabilizers. In addition, they action the allowances of bigger regulation, accepted absorbed /....
-
A series of digital clocks, all with LED outputs, were created for the Electronics in Schools Strategy (EiSS) and used in several of the courses run on behalf of SETPOINT (now STEMPOINT) Devon & Cornwall for secondary school teachers in the south west. The....
-
We use the L293D H-Bridge to operate a 12VDC motor with the Arduino. This H-Bridge allows us to do several things. First it allows us to interface the motor, which requires much more current and voltage than the output pins can supply, with the Arduino. With....
-
The first schematic is for those who never buy parts anywhere but Radio Shack. You can walk in the store and walk out with all the electronics that you need. For the heat sink, sorry to say, you`re on your own. Find a hardware store and buy a big chunk of....
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-
With transistor switching circuit shown for RCA SG2007 laser diode, pulses as short as 10 ns are possible at repetition rates above 100 kHz. Used in optical communication system in which fiber bundle or singlefiber is attached directly to laser pellet. -J.....
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I went with electric because it`s quieter, not smelly and I can carry it up a flight of stairs. I chose the conversion kit made by Currie. Factory service is nonexistent, but EVdeals is a good, knowledgeable dealer. The motor delivers more than ½ horsepower....
-
After charging the batteries for many hours with the 12V charger and PowerCheqs, I drove for about 5 miles and the low battery light came on. PakTrakr showed that the battery next to the most positive battery needed recharging. Apparent that battery is bad,....
-
This circuit measures the distance covered during a walk. Hardware is located in a small box slipped in pants` pocket and the display is conceived in the following manner: the leftmost display D2 (the most significant digit) shows 0 to 9 Km. and its dot is....
-
In hybrid system, analog system with digital control, a voltage controlled things is very important since it can be interfaced by DAC from digital system. For....
-
Building a DIY Alarm System: The Concept So, you want to protect your property, or maybe a room, car, or even your backyard. The concept of an alarm system is to notify the ""alarm administrator"" that there is an intruder entering the previously designated....
-
Build a Knight Rider LED display on breadboard controller by an Arduino. An easy circuit for beginners in electronics using an Arduino Uno....
-
PIC microcontrollers are a very useful and versatile tool for use in many electronic projects. They are very inexpensive and easy to find. They are al....
-
-
MAX2659 low-noise amplifier (LNA) is designed for GPS, Galileo, and GLONASS applications. Designed in Maxim`s advanced SiGe process, the device achieves a 20. 5dB gain and an ultra-low-noise figure of 0. 8dB while maximizing the input-referred 1dB....
-
This is an easy to build, but nevertheless very accurate and useful digital voltmeter. It has been designed as a panel meter and can be used in DC power supplies or anywhere else it is necessary to have an accurate indication of the voltage present. The....
-
Turns-off your amplifier when idle for 15 minutes, Fed by amplifier tape-output This circuit turns-off an amplifier or any other device when a low level a....
-
-
Using the LM4992 stereo audio power amplifier you can design a very simple audio power amplifier electronic project, that can be used for portable electronic devices. This power audio amplifier circuit is capable of delivering 1 watt, per channel, of....
-
Dynamic Mic Mid Boost And Bass Rolloff Schematic Photo: dynamic mic mid boost and bass rolloff schematic. taken from documentation of a known working po ....
-
The current Milwaukee Guitar design uses an off-board computer (a desktop PC) to control the servomotors. A standard USB number pad is connected to the computer which then provides output signals through a Velleman K8055 USB experiment interface board to the....
-
When you press sensor switch SW2, the LED D3 and the alarm switches ON for a while. The timing of the circuit is dependent upon R3 and C1. You can get all the details of the RC circuit from the links given above...
-
CXA1019 FM RADIO CXA1019 is a one-chip FM/AM radio IC designed for radio-cassette tape recorders and headphone tape recorders, and CXA1019S has the...
-
With the aid of an (old) moving coil instrument it is very little effort to make a simple voltmeter that, at a glance, indicates the status of a telephone....
-
240/24Vac(rms) transformer was used. After rectification and filtration i got about 30Vdc. Therefore the transformer and diode rating should be well chosen to meet your demand At the current limiting stage, transistor U1, Q1 and resistor R1 plays the vital....
-
Using the LM3404 are monolithic switching regulator can be designed a very simple constant current driver for high power LEDs. This LED driver electronic project is ideal for automotive, industrial, and general lighting applications. Hysteretic controlled....
-
These two headlight reminder circuits are easy to install and operate on the KISS (Keep It Simple Stupid) principle. The simple circuit involves adding just a 12V piezo buzzer between the lights circuit and a door switch. The buzzer sounds if the lights are....
-
However since the ROM is mapped in at &F000, this in binary is %1111 0000 0000 0000; or in other words when accessing the ROM, A12, A13, A14, and A15 will always be high. Thus, the I/O device selections will always be active at the same time as the ROM....
-
This scheme is an SWR meter, which is quite simple and easily built. Once you make a directional coupler, the results will be displayed with the measure led meters as a ratio SWR...
-
The high temperature alarm will beep and LED blinks when the temperature of the device increases abnormally. This simple over heat alarm is to monitor heat....
-
-
-
J201 JFET works best at 10 volts. The minimum current is 0. 5 mA. These are all ideal specifications. The specification spread of FETs is normally three to five times. I`ve personally seen a five-X variation in brand-name devices. The devices that I`ve....
-
I wanted to use a 3. 5" jack instead of a microphone, I would need to change something else in the circuit. What would be changed in order to use an audio jack instead of a electret microphone to transmit One like this: taken from an old radio. It has 7....
-
Together with a good directional antenna this high performance two-stage antenna amplifier for the VHF FM broadcast band will enable you to capture far removed (DX) stations. Alternatively, it will drastically improve reception of FM signals you`ve come to....
-
Power supplies ? Linear or SMPS (Switched mode) Right away there?s a distinction made between a linear and a switch mode power supply, what?s the difference? A power supply fundamentally is an....
-
-
You have mentioned 89S51/52.But in the picture I see 89C51. Which one do I use for the given .hex file(without the need to change the .hex file)?2....
-
-
A simple and interesting project of a light activated LED circuit, which will light up an LED when receives light. The circuit is very easy to build and using only six components. The photoresistor is performing the light sensing task. The transistor 2N2222....
-
Build primarily as proof of concept and because I found the challenge interresting, this little unit is able to send an ascii string terminated with a CR/LF via a RS232 connection. It`s emulating the transmission of a barcode and can be used with any kind of....
-
-
Some months ago I ordered a EM-406 GPS module from Sparkfun. I intended to explore geotagging and this module seemed to be a simple one to use : integrated antenna, SiRF III chipset (seems to be well know on forums) while not too expensive. You provide a 5V....
-
This is a circuit for alternative sources selection. It combines mechanical selection using a rotating switch S1, the electronic drive of the relays RL 1-10 and also the optical indication of the selection by the Display DSP1....
-
This device beeps intermittently for about two seconds when a person in a range of around meters emits a whistle. The first two inverters contained in IC1 are used as audio amplifiers. IC1A amplifies consistently the signal picked-up by the small....
-
The telephone ring generator shown generates the bare aerial voltage from a simple switching approach ability accumulation (SMPS) which employs a CMOS Schmitt Trigger aboveboard beachcomber oscillator, 10 mH inductor, aerial voltage switching transistor....
-
-
When we modulate a carrier signal with amplitude modulation, there will be four frequency components as the result. The first is the modulating signal itself, the second is the frequency carrier, the the latest two are the difference and the sum of the....
-
This article examines key parameters in choosing a low noise amplifier for low frequency analog applications such as buffering data converters, amplifying strain-gauge signals, and pre-amplifying microphone outputs....
-
CRV-59AAE is 20" long by 9" wide by 10"high. It weighs a mere 33 pounds. It is at least 60 years old and in excellent condition. It represents some of the finest in miniaturized technology for its time. It uses an iconoscope tube as the imager. It contains....
-
-
utilize RGB LED lightsources, an optical sensor and feedback controller. The aim of using optical feedback is a color stability over temperature, maintaining constant brightness, and controlling any color point or brightness required by the LCDs. Within the....
-
This little phono stage completely trounced my sub-mini phono preamp. The phono preamp was extremely quiet with my vintage Grado 8MR cartridge (not MC). This is not a vintage-sounding phono preamp. While it sounds pleasant and definately tube-based, it has....
-
Microchip has announced the availability of new PIC16F1512 and PIC16F151213 XLP microcontrollers. These new XLP (EXtreme Low Power) microcontrollers feature....
-
With this sound activated switch, control by sound may be very useful, not just on a robot but also for a bit of home automation, for example a sound-acti....
-
Building a computer-controlled LED lamp with an ATMEL microcontroller....
-
On astable multivibrators, the duty cycle is usually fixed unless there`s a potentiometer in place, but even still with a diode in parallel with R2, you will only get a duty cycle less than 50%. Also, to ask a question in a new thread, youcan click here.....
-
The micropower circuit provides shutdown, power-up, and low-battery lockout functions automatically, without the need for software or operator control....
-
It is very rugged and reasonably power amplifier circuit that can be used for any audio applications. The amplifier produces 60W rms at 50V supply on a 8 Ohm load. The circuit is designed such that most of the components are not critical and can be easily....
-
The TPA3112D1 is a 25-W efficient, Class-D Audio power Amplifier for driving a bridge tied speaker. Advanced EMI Suppression Technology enables the use of inexpensive ferrite bead Filters at the outputs while meeting EMC requirements. SpeakerGuard speaker....
-
The simple pressure sensor alarm is built around a couple of readily available cheap components. Working of this circuit is straight forward and self-explanatory. When the circuit is powered by a 9V compact battery, the active piezo-sounder at the output of....
-
This lovely circuit is a real gem! Easy to assemble and more sensitive than many commercial devices available....
-
-
Here s a project that could be useful this summer on the beach, to stop anyone touching your things left on your beach towel while you ve gone swimming; y....
-
While working two-meter SSB from the Benson area, I decided that local terrain and the limited height of my home-made six-element yagi, necessitate I incorporate a high gain antenna pre-amplifier at it`s terminations to enhance receiver signal strength. This....
-
-
-
Quartz crystals have the property that their amplitude/phase characteristic repeats itself at frequencies that are an uneven multiple of the fundamental frequency. There are so-called overtone crystals that are cut in such a manner that they possess this....
-
Potentially, headphone listening can be technically superior since room reflections are eliminated and the intimate contact between transducer and ear mea....
-
The drawbacks of pi-filters are the comparatively larger cost, more weight, bigger size and external field developed by the series inductor. However, these drawbacks can be overcome by replacing the series inductor by a series resistor R. Such a circuit is....
-
Hobby Servo`s Turn DMX signals into mechanical motion. Generally hobby servo`s require a pulse having a variable width from 1 to 2 milli seconds, with 1. 5mSec as the center position. The schematic below is a simple voltage to pulse width circuit. This is a....
-
-
Using a heatsink, the TRIAC (TR1) can handle up to 350 watts. The neon lamp, I1, won`t trip the gate until after it conducts and using R1, set the lighting wherever you want it. ..
-
Diode D1 and resistor R1 provide the VDD isolation when programming the 24 pin devices. The jumper J3 must be shorted for 24 pin devices, and open circuit for 28 pin device programming. Following EEPROMs are pin compatible with their EPROMs version, ..
-
This is a high-brightness LED-driver circuit. To provide a constant-voltage output we usually use DC/DC regulators. But constant-current output is the one that....
-
This simple circuit that can be used to flash incandescent lamps up to 10W power rating. The circuit is ideal for making flashing beacons on automobiles and other applications like that. The circuit is nothing but an astable multi vibrator based on Q1&Q2 (....
-
The following circuit shows about BC547 Transistor For Output Relay Delay Audio Amplifier Circuit Diagram. Features: disconnects the speaker immdiatly when the ....
-
The purpose of this application note is to present an example circuit, illustrating how to operate the XR-T5683 device at 10. 1 Mbps. This note shows the results of measurements made on the XR-T5683 at a 10. 1 Mbps data rate. Hardware used for this....
-
Large Dancing Robot Build a large dancing robot. This was supposed to be a walking robot, but it more kinda beebopped around. video on last step. Build a P....
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The plumbing is done and the fuel system is done. Final checks on the electrical system are under way. More tidying up and testing of the bike loom. Nearly there. I`ve got onequery though. My 2003 loom has two unused connectors for an alarm system. To me,....
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This is a circuit of Low-Light Level Drop Detector. This circuit utilize self-biasing configuration to detect small changes in light level. This circuit....
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A very efficient buck boost converter circuit is shown here. The circuit is based on the LTC3440 buck boost regulator IC from Linear Technology. The LTC3440 requires only one inductor and provides up to 96% efficiency. There is no need of Schottky diode for....
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This Electro Harmonix Big Muff Pi circuit would most likely be better making the change by a contemporary input-jack power and a DPDT bypass switch. The kinds of transistors and diodes are unknown. It really is most likely that any high acq....
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The series of light switches this time slightly different from the voltage of work. The series of light switches can work directly on the AC power network. Light switches are using the main component of TRIAC and LDR. The circuit is very simple and the....
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A popular circuit known as a Hartley oscillator. Its identifiable feature is the tapped coil in the LC tank circuit. Notice that the coil`s tap point is grounded. The amplifier portion of the oscillator is a common-emitter amplifier. Therefore, the ac base....
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Also you have mentioned that the op amp in the second stage gets damaged. Can you confirm that by testing that op amp in a buffer configuration(or any simple configuration) I am asking you to do this because we need to know if the part is actually failing or....
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So far in this series we`ve had a diverse look at how Arduino can interact with a range of real-world devices from servo motors to ultrasonic range finders TVs to humidity sensors. Now we`ll see if we could get the Arduino to make a few sounds. We`ll....
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A good quality preamp tone controls, a total of three circuits. We choose to use the NE5532 is main so interesting IC, because the ultra-low noise properties, it is commonly used in many fine audio. But these circuits are old. I have a circuits of friends.....
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In the 20. 5X10. 5 cm rectangular piece, there is a hole of diameter 1. 5 cm to attach the motors for movement of the ROBO CAR with the help of nut and bolt system. The caster wheels used in the DTMF based ROBO CAR is made up from the cast iron material and....
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This analog switch circuit is designed to switch on or off and analog line. it consists of two analog switches in IC form that are controlled by two pushbu....
When both S1 and R2 are on, current flows through each of the lamps, which are connected to the rheostat in. parallel. The amount of current flow and thus the intensity of illumination can be controlled by varying the effective the batteries because the....
the moving message will be display on the LCD which will be controlled through microcontroller and the message will be sent by computer using RS232. The circuit diagram of the moving message display is shown in this post and how the whole process is....
Arduino is an open-source electronics prototyping platform based on flexible, easy-to-use hardware and software. It`s intended for artists, designers, hobbyists, and anyone interested in creating interactive objects or environments. Arduino can sense the....
This type of infrared proximity circuit is widely used as an electric switch where physical contact is not desired for hygiene purpose. For example, we commonly see use of infrared proximity sensors on public drinking fountains and in public washrooms. The....
A keypad enters a four-digit access code, which is programmed via jumpers on a 24-pin plug-in header and socket. U1 is an LST220, which detects a four-digit sequential data input. When the correct data is entered into the keyboard, pin 13 of U1 goes high,....
You can cut away the 555 timer oscillator part and add your favorite microphone modulating circuit to transmit voice over to your tv set with a little tuning. Schematics in Schematics Depot were found on the internet and assumed to be in public domain.....
Voltage Regulators low ability burning IC 78W alternation acclimated in our chart is now so bargain they are an economical another to simple regulators NPN-stabilizers. In addition, they action the allowances of bigger regulation, accepted absorbed /....
A series of digital clocks, all with LED outputs, were created for the Electronics in Schools Strategy (EiSS) and used in several of the courses run on behalf of SETPOINT (now STEMPOINT) Devon & Cornwall for secondary school teachers in the south west. The....
We use the L293D H-Bridge to operate a 12VDC motor with the Arduino. This H-Bridge allows us to do several things. First it allows us to interface the motor, which requires much more current and voltage than the output pins can supply, with the Arduino. With....
The first schematic is for those who never buy parts anywhere but Radio Shack. You can walk in the store and walk out with all the electronics that you need. For the heat sink, sorry to say, you`re on your own. Find a hardware store and buy a big chunk of....
With transistor switching circuit shown for RCA SG2007 laser diode, pulses as short as 10 ns are possible at repetition rates above 100 kHz. Used in optical communication system in which fiber bundle or singlefiber is attached directly to laser pellet. -J.....
I went with electric because it`s quieter, not smelly and I can carry it up a flight of stairs. I chose the conversion kit made by Currie. Factory service is nonexistent, but EVdeals is a good, knowledgeable dealer. The motor delivers more than ½ horsepower....
After charging the batteries for many hours with the 12V charger and PowerCheqs, I drove for about 5 miles and the low battery light came on. PakTrakr showed that the battery next to the most positive battery needed recharging. Apparent that battery is bad,....
This circuit measures the distance covered during a walk. Hardware is located in a small box slipped in pants` pocket and the display is conceived in the following manner: the leftmost display D2 (the most significant digit) shows 0 to 9 Km. and its dot is....
In hybrid system, analog system with digital control, a voltage controlled things is very important since it can be interfaced by DAC from digital system. For....
Building a DIY Alarm System: The Concept So, you want to protect your property, or maybe a room, car, or even your backyard. The concept of an alarm system is to notify the ""alarm administrator"" that there is an intruder entering the previously designated....
Build a Knight Rider LED display on breadboard controller by an Arduino. An easy circuit for beginners in electronics using an Arduino Uno....
PIC microcontrollers are a very useful and versatile tool for use in many electronic projects. They are very inexpensive and easy to find. They are al....
MAX2659 low-noise amplifier (LNA) is designed for GPS, Galileo, and GLONASS applications. Designed in Maxim`s advanced SiGe process, the device achieves a 20. 5dB gain and an ultra-low-noise figure of 0. 8dB while maximizing the input-referred 1dB....
This is an easy to build, but nevertheless very accurate and useful digital voltmeter. It has been designed as a panel meter and can be used in DC power supplies or anywhere else it is necessary to have an accurate indication of the voltage present. The....
Turns-off your amplifier when idle for 15 minutes, Fed by amplifier tape-output This circuit turns-off an amplifier or any other device when a low level a....
Using the LM4992 stereo audio power amplifier you can design a very simple audio power amplifier electronic project, that can be used for portable electronic devices. This power audio amplifier circuit is capable of delivering 1 watt, per channel, of....
Dynamic Mic Mid Boost And Bass Rolloff Schematic Photo: dynamic mic mid boost and bass rolloff schematic. taken from documentation of a known working po ....
The current Milwaukee Guitar design uses an off-board computer (a desktop PC) to control the servomotors. A standard USB number pad is connected to the computer which then provides output signals through a Velleman K8055 USB experiment interface board to the....
When you press sensor switch SW2, the LED D3 and the alarm switches ON for a while. The timing of the circuit is dependent upon R3 and C1. You can get all the details of the RC circuit from the links given above...
CXA1019 FM RADIO CXA1019 is a one-chip FM/AM radio IC designed for radio-cassette tape recorders and headphone tape recorders, and CXA1019S has the...
With the aid of an (old) moving coil instrument it is very little effort to make a simple voltmeter that, at a glance, indicates the status of a telephone....
240/24Vac(rms) transformer was used. After rectification and filtration i got about 30Vdc. Therefore the transformer and diode rating should be well chosen to meet your demand At the current limiting stage, transistor U1, Q1 and resistor R1 plays the vital....
Using the LM3404 are monolithic switching regulator can be designed a very simple constant current driver for high power LEDs. This LED driver electronic project is ideal for automotive, industrial, and general lighting applications. Hysteretic controlled....
These two headlight reminder circuits are easy to install and operate on the KISS (Keep It Simple Stupid) principle. The simple circuit involves adding just a 12V piezo buzzer between the lights circuit and a door switch. The buzzer sounds if the lights are....
However since the ROM is mapped in at &F000, this in binary is %1111 0000 0000 0000; or in other words when accessing the ROM, A12, A13, A14, and A15 will always be high. Thus, the I/O device selections will always be active at the same time as the ROM....
This scheme is an SWR meter, which is quite simple and easily built. Once you make a directional coupler, the results will be displayed with the measure led meters as a ratio SWR...
The high temperature alarm will beep and LED blinks when the temperature of the device increases abnormally. This simple over heat alarm is to monitor heat....
J201 JFET works best at 10 volts. The minimum current is 0. 5 mA. These are all ideal specifications. The specification spread of FETs is normally three to five times. I`ve personally seen a five-X variation in brand-name devices. The devices that I`ve....
I wanted to use a 3. 5" jack instead of a microphone, I would need to change something else in the circuit. What would be changed in order to use an audio jack instead of a electret microphone to transmit One like this: taken from an old radio. It has 7....
Together with a good directional antenna this high performance two-stage antenna amplifier for the VHF FM broadcast band will enable you to capture far removed (DX) stations. Alternatively, it will drastically improve reception of FM signals you`ve come to....
Power supplies ? Linear or SMPS (Switched mode) Right away there?s a distinction made between a linear and a switch mode power supply, what?s the difference? A power supply fundamentally is an....
You have mentioned 89S51/52.But in the picture I see 89C51. Which one do I use for the given .hex file(without the need to change the .hex file)?2....
A simple and interesting project of a light activated LED circuit, which will light up an LED when receives light. The circuit is very easy to build and using only six components. The photoresistor is performing the light sensing task. The transistor 2N2222....
Build primarily as proof of concept and because I found the challenge interresting, this little unit is able to send an ascii string terminated with a CR/LF via a RS232 connection. It`s emulating the transmission of a barcode and can be used with any kind of....
Some months ago I ordered a EM-406 GPS module from Sparkfun. I intended to explore geotagging and this module seemed to be a simple one to use : integrated antenna, SiRF III chipset (seems to be well know on forums) while not too expensive. You provide a 5V....
This is a circuit for alternative sources selection. It combines mechanical selection using a rotating switch S1, the electronic drive of the relays RL 1-10 and also the optical indication of the selection by the Display DSP1....
This device beeps intermittently for about two seconds when a person in a range of around meters emits a whistle. The first two inverters contained in IC1 are used as audio amplifiers. IC1A amplifies consistently the signal picked-up by the small....
The telephone ring generator shown generates the bare aerial voltage from a simple switching approach ability accumulation (SMPS) which employs a CMOS Schmitt Trigger aboveboard beachcomber oscillator, 10 mH inductor, aerial voltage switching transistor....
When we modulate a carrier signal with amplitude modulation, there will be four frequency components as the result. The first is the modulating signal itself, the second is the frequency carrier, the the latest two are the difference and the sum of the....
This article examines key parameters in choosing a low noise amplifier for low frequency analog applications such as buffering data converters, amplifying strain-gauge signals, and pre-amplifying microphone outputs....
CRV-59AAE is 20" long by 9" wide by 10"high. It weighs a mere 33 pounds. It is at least 60 years old and in excellent condition. It represents some of the finest in miniaturized technology for its time. It uses an iconoscope tube as the imager. It contains....
utilize RGB LED lightsources, an optical sensor and feedback controller. The aim of using optical feedback is a color stability over temperature, maintaining constant brightness, and controlling any color point or brightness required by the LCDs. Within the....
This little phono stage completely trounced my sub-mini phono preamp. The phono preamp was extremely quiet with my vintage Grado 8MR cartridge (not MC). This is not a vintage-sounding phono preamp. While it sounds pleasant and definately tube-based, it has....
Microchip has announced the availability of new PIC16F1512 and PIC16F151213 XLP microcontrollers. These new XLP (EXtreme Low Power) microcontrollers feature....
With this sound activated switch, control by sound may be very useful, not just on a robot but also for a bit of home automation, for example a sound-acti....
On astable multivibrators, the duty cycle is usually fixed unless there`s a potentiometer in place, but even still with a diode in parallel with R2, you will only get a duty cycle less than 50%. Also, to ask a question in a new thread, youcan click here.....
The micropower circuit provides shutdown, power-up, and low-battery lockout functions automatically, without the need for software or operator control....
It is very rugged and reasonably power amplifier circuit that can be used for any audio applications. The amplifier produces 60W rms at 50V supply on a 8 Ohm load. The circuit is designed such that most of the components are not critical and can be easily....
The TPA3112D1 is a 25-W efficient, Class-D Audio power Amplifier for driving a bridge tied speaker. Advanced EMI Suppression Technology enables the use of inexpensive ferrite bead Filters at the outputs while meeting EMC requirements. SpeakerGuard speaker....
The simple pressure sensor alarm is built around a couple of readily available cheap components. Working of this circuit is straight forward and self-explanatory. When the circuit is powered by a 9V compact battery, the active piezo-sounder at the output of....
This lovely circuit is a real gem! Easy to assemble and more sensitive than many commercial devices available....
Here s a project that could be useful this summer on the beach, to stop anyone touching your things left on your beach towel while you ve gone swimming; y....
While working two-meter SSB from the Benson area, I decided that local terrain and the limited height of my home-made six-element yagi, necessitate I incorporate a high gain antenna pre-amplifier at it`s terminations to enhance receiver signal strength. This....
Quartz crystals have the property that their amplitude/phase characteristic repeats itself at frequencies that are an uneven multiple of the fundamental frequency. There are so-called overtone crystals that are cut in such a manner that they possess this....
Potentially, headphone listening can be technically superior since room reflections are eliminated and the intimate contact between transducer and ear mea....
The drawbacks of pi-filters are the comparatively larger cost, more weight, bigger size and external field developed by the series inductor. However, these drawbacks can be overcome by replacing the series inductor by a series resistor R. Such a circuit is....
Hobby Servo`s Turn DMX signals into mechanical motion. Generally hobby servo`s require a pulse having a variable width from 1 to 2 milli seconds, with 1. 5mSec as the center position. The schematic below is a simple voltage to pulse width circuit. This is a....
Using a heatsink, the TRIAC (TR1) can handle up to 350 watts. The neon lamp, I1, won`t trip the gate until after it conducts and using R1, set the lighting wherever you want it. ..
Diode D1 and resistor R1 provide the VDD isolation when programming the 24 pin devices. The jumper J3 must be shorted for 24 pin devices, and open circuit for 28 pin device programming. Following EEPROMs are pin compatible with their EPROMs version, ..
This is a high-brightness LED-driver circuit. To provide a constant-voltage output we usually use DC/DC regulators. But constant-current output is the one that....
This simple circuit that can be used to flash incandescent lamps up to 10W power rating. The circuit is ideal for making flashing beacons on automobiles and other applications like that. The circuit is nothing but an astable multi vibrator based on Q1&Q2 (....
The following circuit shows about BC547 Transistor For Output Relay Delay Audio Amplifier Circuit Diagram. Features: disconnects the speaker immdiatly when the ....
The purpose of this application note is to present an example circuit, illustrating how to operate the XR-T5683 device at 10. 1 Mbps. This note shows the results of measurements made on the XR-T5683 at a 10. 1 Mbps data rate. Hardware used for this....
Large Dancing Robot Build a large dancing robot. This was supposed to be a walking robot, but it more kinda beebopped around. video on last step. Build a P....
The plumbing is done and the fuel system is done. Final checks on the electrical system are under way. More tidying up and testing of the bike loom. Nearly there. I`ve got onequery though. My 2003 loom has two unused connectors for an alarm system. To me,....
This is a circuit of Low-Light Level Drop Detector. This circuit utilize self-biasing configuration to detect small changes in light level. This circuit....
A very efficient buck boost converter circuit is shown here. The circuit is based on the LTC3440 buck boost regulator IC from Linear Technology. The LTC3440 requires only one inductor and provides up to 96% efficiency. There is no need of Schottky diode for....
This Electro Harmonix Big Muff Pi circuit would most likely be better making the change by a contemporary input-jack power and a DPDT bypass switch. The kinds of transistors and diodes are unknown. It really is most likely that any high acq....
The series of light switches this time slightly different from the voltage of work. The series of light switches can work directly on the AC power network. Light switches are using the main component of TRIAC and LDR. The circuit is very simple and the....
A popular circuit known as a Hartley oscillator. Its identifiable feature is the tapped coil in the LC tank circuit. Notice that the coil`s tap point is grounded. The amplifier portion of the oscillator is a common-emitter amplifier. Therefore, the ac base....
Also you have mentioned that the op amp in the second stage gets damaged. Can you confirm that by testing that op amp in a buffer configuration(or any simple configuration) I am asking you to do this because we need to know if the part is actually failing or....
So far in this series we`ve had a diverse look at how Arduino can interact with a range of real-world devices from servo motors to ultrasonic range finders TVs to humidity sensors. Now we`ll see if we could get the Arduino to make a few sounds. We`ll....
A good quality preamp tone controls, a total of three circuits. We choose to use the NE5532 is main so interesting IC, because the ultra-low noise properties, it is commonly used in many fine audio. But these circuits are old. I have a circuits of friends.....
In the 20. 5X10. 5 cm rectangular piece, there is a hole of diameter 1. 5 cm to attach the motors for movement of the ROBO CAR with the help of nut and bolt system. The caster wheels used in the DTMF based ROBO CAR is made up from the cast iron material and....
This analog switch circuit is designed to switch on or off and analog line. it consists of two analog switches in IC form that are controlled by two pushbu....
