New Circuits Page 53
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A nice design which even turns off if the pushbutton is held depressed or jammed a long time. Not re-triggerable while the light is still on though(Thanks for pointing that out Watson): Below is one that starts off bright and slowly dims out to nothing. They....
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The LM48824`s Stereo Headphone Amplifier (Class G architecture ) increases audio (MP3, mobile TV, etc. ) playback time with its adaptive power supply approach that enables very low supply rails, which doubles the power-efficiency compared to typical Class AB....
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This TDA2030 200 watt amp low cost audio power amplifier can deliver high output audio power up to 200 watts on a 2 4 ohms load impedance. This 200 watt amp high power audio amplifier is build around the TDA2030 audio amplifier IC which normally can deliver....
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Combines signals from loop and sense antennas of automatic direction finder, to give 130-cps output having correct phase for driving rotor of resolver to null position.-P. V.Sparks, Servo Filter and Gain Control lmprove Automatic Direction Finder,....
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The target of this project was the design of a small portable mixer supplied by a 9V PP3 battery, keeping high quality performance. The mixer is formed assembling three main modules that can be varied in number and/or disposition to suit everyone needs. The....
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Common Light Emitting Diodes (LEDs) require a DC forward bias current of 10 to 20 mA for proper operation. Typically the maximum DC current is 30 to 50 mA. The color of light (or wavelength ») emitted from an LED depends on the semiconductor material used to....
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The State Jal Boards supply water for limited duration in a day. Time of water supply is decided by the management and the public does not know the same. In such a situation, this water alarm circuit will save the people from long wait as it will inform them....
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-
The AK4532 is a low-cost high-quality 16-Bit CODEC designed specifically for Internet Boxes, Network PCs, and to Interface with Audio Video controller ICs for standard PC applications. AKMs AK4532 serial Interface mode simplifies the design process on....
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This is the circuit diagram for the Comfile CUSB-36R Programmed Christmas Lights. If it is a little hard to read drop me an email at keithsw1@yahoo. com and I will return a more detailed schematic. Basically the Comfile CUSB-36R can either directly drive....
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Color TV chroma processor with ACC, color killer, and an injection lock reference system. fypical power supply voltage is 9 to 11. 5 volts. Hue control range is 100 degrees. The oscillator output signal is 180 mV PMS (courtesy GTE Sylvania Incorporated). ..
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The following circuit shows about NE555 Timer For Electronic Scooring Game Circuit Diagram. Features:The circuit comprises a timer IC, with a ....
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I have a Nidec TA450DC B35502-35 fan which I`ve installed in a large wooden cabinet where my computer and other electronics sit. This cabinet of course gets hot from all the electronics inside of it. The fan forces air in from the room and goes out through....
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how to interface an lcd to 89c51 using 4 bit mode. am using lampex16200 pls send me manual of this controller....
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-
Ripple-free, Short-circuit protected variable output voltage and current power supply in this website is verified project.circuit diagram with description of power supply circuit various power supply circuit ...
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Police Siren circuit diagram. This circuit produces a sound similar to the police siren. It makes use of two 555 timer ICs used as...
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L2 RFC (resistance 1MOhm with wrapped around her inductor of enough coils from fine isolated wire. Scratch of utmost inductor and you stick in utmost the resistance making thus a parallel L-r circuit. ) With their C7, C8 we adapt the resistance of aerial....
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The main part of this circuit Doorbell two timer NE555 ICs. When someone hit the switch S1 momentarily, the speaker emits a sound of the bell, if the time period of the monostable multivibrator built around IC1. When the switch S1 pressed, IC1 is enabled in....
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This is a status panel driver circuit. This circuit is used to turn on lamps or LEDs in a graphic panel that represent faults, action, and status of an....
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-
This is a switched system, meaning it doesn`t have a sequencer like modern electric furnaces. Instead, relays are used. Maybe this is a good upgrade to make, installing a sequencer. The blower is a 5 speed blower, although only two seem to be used (unlike....
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Maybe you ever use LM555 as timer project before, yes it also nice if you want to make analog timer using LM555. According datasheet LM555 this IC can use for several purpose in electronic project like to adjust timer according time needed. From figure 1....
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Powering the system is required by many applications while charging the battery simultaneously. Interaction between the system and charger may result in a....
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Processor based systems usually require a voltage supervisor chip to produce a clean reset pulse to the processor whenever a brown-out` condition of the power supply is detected. More complex designs employing multiple power supplies can be unreliable if....
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Circuit likes sampled output of multiplexer and provides current required for driving transfluxor in analog-digital converter that produces six-bit binary Gray code. -N. Aron and C. Granger, Analog-To-Digital Converter Uses Transfluxors, Electronics, 35:20,....
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I am using the UCD90124/A, among other things, to monitor multiple voltages. Several of these are > 2. 5v so I have scaling circuits so as not to violate the 2. 5v max on the Mon inputs. My question is, do I enter the raw voltage values in Fusion for such....
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For normal wailing tone, short D1 and open R2. For fast rise and slow fall in frequency, include D1 and R2. Use of a CD4046B with a diode-RC network as shown produces a siren tone, using a VCO. ..
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I have since constructed a programming "jig" to avoid keeping the circuit on the breadboard. More detail, and photographs can be found on the Learning About the AVR Parallel Programmer page. ..
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Stationary - MOPLL & Silicon Tuner TUA6020 2 Band TV Tuner Mixer-Oscillator-PLL with balanced IF-Amplifier The TUA6020 device combines a digitally programmable Phase locked loop (PLL), with a mixer-oscillator block including two balanced mixers and oscilla-....
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This is a design circuit for measure inductance of the inductor labeled LX which is the inductance to be measured. The o/p of the circuit is a TTL square wave whose frequency relates to the inductance being measured. The inductance meter adapter output is....
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The circuit is built around two 555 timer ICs. U1 and U2. U1 is wired as a variable duty cycle oscillator with a constant time period of around 0. 1 second. Duty cycle can be varied from 0 to 100 per cent by R4 potentiometer. The output of U1 (pin 3) is....
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The video circuit illustrated in Figure 1 combines an audio-subcarrier notch filter and group-delay equalization as required by the ITU-470 standard. It also includes an amplitude-adjustment capability for driving an RF video modulator in NTSC applications.....
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Bipolar transistor amplifiers must be properly biased to operate correctly. In circuits made with individual devices (discrete circuits), biasing networks consisting of resistors are commonly employed. Much more elaborate biasing arrangements are used in....
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Electric locos derive tractive effort from Traction Motors which are usually placed in the bogie of the locomotive. Usually one motor is provided per axle but in some older generation of locos two axles were driven by a single Traction Motor also. However....
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Triangular wave generator in this website has more advantage triangular wave with maximum peak level and minimum peak level circuit diagram and description of triangular wave generator...
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This basic oscillator will detect the Earth magnetic field. The ferrite rod and coil are taken from an old Medium Wave receiver and a small magnet is glued at one end. Tune to a medium wave commercial station until you hear a beat note. Any movement of the....
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This continuity tester gives a beep sound if detect an electric current conduction between its probes. Here is the schematic diagram of this audible....
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This low power fm transmitter is designed to use an input from another sound source and transmits on the commercial FM band. This low power fm radio transmitter it is actually quite powerful The first stage is the oscillator, and is tuned with the variable....
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This LED flasher circuit is a classic two transistor flip flop. This flasher circuit is very popular and it`s usually the first circuit to build when starting electronic circuit building hobby. Here is the schematic diagram of the famous LED flasher circuit:....
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Circuit diagram is a simple but effective circuit intercom circuit is based entirely on transistors. Circuit diagram is based on three stages plus RC amplifier. When the pushbutton S2 is pressed, the amplifier cord around T1 ...
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This design adopts a well established circuit topology for the power amplifier, using a single-rail supply of about 60V and capacitor-coupling for the speaker(s). The advantages for a guitar amplifier are the very simple circuitry, even for comparatively....
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This is a programmable alarm timer ambit that uses alone LEDs to announce hours and minutes. 12 LEDs can be abiding in a amphitheater to represent the 12 hours of a alarm face and an added 12 LEDs can be abiding in an alien amphitheater to announce 5 minute....
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I`ve decided to start selling these on ebay to raise some money for parts. Here`s a link to the current auction and here`s a photo of the current model: Switchgate is a simple dual gate based on a 556 in monostable mode (with trigger input), with the....
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The IR detector (IC3) controls an LM 7555 CMOS timer (IC2) which operates in mono stable mode. When the beam is broken, IC2 is triggered and its pin 3 output goes high for about half a second. This extinguishes LED1 and turns on transistor Q1 to drive a 5V....
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This is a vocational training report on Ultrasonic Proximity Detector undertaken under at Bharat Heavy Electrical Limited (BHEL)in partial fulfillment of the requirement for the Bachelor in Electrical engineering. The report covers topics like Making Printed....
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Oscillator Cores (cClappCore, cHartleyCore, cModifiedClappCore, and cModifiedColpittsCore) are compatible with simulation and measurement setups outlined by the Generic Oscillator Example. These core oscillator circuits are configured for low resistance....
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Flight Computer V1. 0: B1 PC Board U1 80C32 microprocessor U2 27C256-12 32Kx8 ROM - 120nS U3 74HC373 U4 LM340T-5 5v regulator (might be a 7805 part) U5 43C256-15 32Kx8 RAM - 150nS U6 74HC00 T1-T4 2N6045 or 2N6044 darlington output transistors Y1 11MHz....
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The diode tube we are about to study is really Edison`s old incandescent bulb with the plate in it. Diode means two elements or two electrodes, and refers to the two parts within the glass container that make up the tube. Within a few years after the....
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Function: for driving small UHF TV transmitters, with gain is 7dB and can amplify a signal between 470-860 MHz. Component: Resistor, Capacitor, Transistor, ....
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Avoid drilling extra holes and making changes to the chassis and pcbs by all means. This will decrease the value of your amp since you will not be able to restore it to the original state anymore. Make sure to take pictures of the original state of the amp,....
-
This is one of the most basic 555 circuits. This circuit is part of this chips datasheet, complete with the math needed to design to specification, and is one of the reasons a 555 is referred to as a timer. The green LED shown on the illustration lights when....
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-
This is an original design for an interpolating scanner, a circuit with a number of signal inputs, a control voltage input and a signal output. The output effectively selects between the inputs, fading from one to the next, as the control voltage rises. A....
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Snap all connectors on to the flat cable (a small vice will do the job). You get an instant male-male, male-female, female-female serial adaptor, plus a short extender cord. A must-have tool if you`re planning to play with serial ports. You can even put an....
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Switching regulators work by drawing small amounts of energy from the input source and transferring it step by step to the output. This task is attained by using an electronic switch (operating at a predetermined frequency) which works like a gate between....
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Because of this audio mixer, I can compare the various receivers just by twiddling the gain controls. No switching required. Makes A/B comparisons a snap. (They are all driven by the same antenna). All of this used to be easy I just used a different speaker....
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DAC is short for Digital to Analog Converter. In this article we play around the code Michael Smith created for a PWM based DAC. I modified his code so that other DAC options could be tried. I compare the 8-Bit PWM DAC with the R2R DAC at various numbers of....
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Main matched LG26 one inch of screens of FSP107-2PS01 two-in-one electrical power package, direct drive CCFL modulator tube, its material object is shown as in Fig. 1. If cooperate with other producers For instance Samsung, AU, etc. Screen at, it is only at....
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The following circuit shows about DTMF Remote Domestic System Control Circuit Diagram. Features: DTMF signals can be transmitted over a radio to ....
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This mic preamp uses the low noise IC uA739. The circuit is an example of how a good preamplifier can be designed for dynamic microphones. The IC houses two identical integrated preamp circuits. The second preamp is used in identical manner This mic preamp....
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The schematic that this is based on is my own, so it is free from Intellectual property restrictions. It is based around a 555 timer (so it could be an extension of the recent "Know Your 555 timer" article), and uses an ubiquitous LM386 audio amp so it can....
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A relay circuit to function as a DPDT toggle which is controlled by a momentary switch. I strive to keep my circuits simple with little or no integration (555`s, transistors, etc). The circuit is shown active or on mode. Half of RL1 and RL2 manipulate the....
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Circuit diagram of this simple in design for high voltage DC Impedance. This is a circuit diagram with circuit design that was built by uA741 IC. IC is the op-amp non-inverting DC amplifier. IC that has a negative feedback through the DC meters need to 1mA....
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The circuit was designed to create a line preamplifier by acquiring the use of double triode tubes. The circuit comprises of three parts, the main preampl....
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This is the seventh part of an ongoing series about building a low cost, open source streaming internet radio. If you haven`t already, check out the previous parts (see the links at the end of this article) for some background about the project. In part six,....
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I have an 01 Civic EX. A/c blew very cold. On a hot day ran into a store, came out to start the car and it blew hot air. Checked the fuses and all seemed fine, but just hot air. Took it to two mechaniscs, both said the compressor was fine and coolant was....
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Nixie tubes were used for numeric - and sometimes alpha - displays back in the days before LEDs and LCDs. They were more light bulbs than tubes, but were encapsulated in evacuated glass shells like vacuum tubes and had round, multi-pin bases like tubes.....
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This circuit features automatic Exit and Entry delays and a timed Bell Cut-off. It has provision for both normally-closed and normally-open contacts, and a 24-hour Personal Attack/Tamper zone. It is connected permanently to the 12-volt supply and its....
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-
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Multisim is the simulation software of circuit based on SPICE, SPICE Simulation Program with Intergrated Circuit Emphasis lay particular emphasis on the simulation program of the integrated circuit Abbreviation, it is here 1975, from University of....
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The following circuit shows about Robotics IR Navigation Sensor Circuit Diagram. Features: one chip 74HC04, IR sensor will work in direct sun ....
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Small and portable unit, Can be built on a veroboard The amplifier s gain is nominally 20 dB. Its frequency response is determined primarily by the value....
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This is a simple single zone home Alarms Systems circuit. Its features include Entry delays, a timed Siren Cut-Off and and automatic Exit. It`s designed to be used with the usual types of normally-closed input devices such as - - foil tape - micro switches -....
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This is an article written by a one of my readers, Yash Tambi, Core Committee Member, roboVITics. Do read this post and pitch in your comments below regarding this. Thanks! RF controlled bots are the most simple of their kind. All you need are a few ICs,....
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This circuit charges two NiCad cells with a constant current and features dual charging rates, voltage cutoff and an audible alarm. The circuit is powered....
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This Homemade GSM Car Security System super simple circuit design of a GSM car security system really works....
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In order that the MonomeSerial software `sees` the monome clone, it`s necessary to change the serial number of the arduino`s EEPROM to resemble the serial number of a real monome. I successfully followed Melka`s instructions that have been posted on the....
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The Mainline ST-5 was originally Introduced in the RTTY JOURNAL in May, 1970. It has rapidly become one of the most popular demodulators for RTTY. As back issues have been un available for some time, the original article is being reprinted. For those....
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The 5 V from USB seems to be powering the led on my laptop power brick. Hence even when I switched the power brick off at the wall outlet, the led is still on. When I unplug the USB it goes off but comes back on again as soon as I plug it in. Do Ijust but a....
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A nice design which even turns off if the pushbutton is held depressed or jammed a long time. Not re-triggerable while the light is still on though(Thanks for pointing that out Watson): Below is one that starts off bright and slowly dims out to nothing. They....
The LM48824`s Stereo Headphone Amplifier (Class G architecture ) increases audio (MP3, mobile TV, etc. ) playback time with its adaptive power supply approach that enables very low supply rails, which doubles the power-efficiency compared to typical Class AB....
This TDA2030 200 watt amp low cost audio power amplifier can deliver high output audio power up to 200 watts on a 2 4 ohms load impedance. This 200 watt amp high power audio amplifier is build around the TDA2030 audio amplifier IC which normally can deliver....
Combines signals from loop and sense antennas of automatic direction finder, to give 130-cps output having correct phase for driving rotor of resolver to null position.-P. V.Sparks, Servo Filter and Gain Control lmprove Automatic Direction Finder,....
The target of this project was the design of a small portable mixer supplied by a 9V PP3 battery, keeping high quality performance. The mixer is formed assembling three main modules that can be varied in number and/or disposition to suit everyone needs. The....
Common Light Emitting Diodes (LEDs) require a DC forward bias current of 10 to 20 mA for proper operation. Typically the maximum DC current is 30 to 50 mA. The color of light (or wavelength ») emitted from an LED depends on the semiconductor material used to....
The State Jal Boards supply water for limited duration in a day. Time of water supply is decided by the management and the public does not know the same. In such a situation, this water alarm circuit will save the people from long wait as it will inform them....
The AK4532 is a low-cost high-quality 16-Bit CODEC designed specifically for Internet Boxes, Network PCs, and to Interface with Audio Video controller ICs for standard PC applications. AKMs AK4532 serial Interface mode simplifies the design process on....
This is the circuit diagram for the Comfile CUSB-36R Programmed Christmas Lights. If it is a little hard to read drop me an email at keithsw1@yahoo. com and I will return a more detailed schematic. Basically the Comfile CUSB-36R can either directly drive....
Color TV chroma processor with ACC, color killer, and an injection lock reference system. fypical power supply voltage is 9 to 11. 5 volts. Hue control range is 100 degrees. The oscillator output signal is 180 mV PMS (courtesy GTE Sylvania Incorporated). ..
The following circuit shows about NE555 Timer For Electronic Scooring Game Circuit Diagram. Features:The circuit comprises a timer IC, with a ....
I have a Nidec TA450DC B35502-35 fan which I`ve installed in a large wooden cabinet where my computer and other electronics sit. This cabinet of course gets hot from all the electronics inside of it. The fan forces air in from the room and goes out through....
how to interface an lcd to 89c51 using 4 bit mode. am using lampex16200 pls send me manual of this controller....
Ripple-free, Short-circuit protected variable output voltage and current power supply in this website is verified project.circuit diagram with description of power supply circuit various power supply circuit ...
Police Siren circuit diagram. This circuit produces a sound similar to the police siren. It makes use of two 555 timer ICs used as...
L2 RFC (resistance 1MOhm with wrapped around her inductor of enough coils from fine isolated wire. Scratch of utmost inductor and you stick in utmost the resistance making thus a parallel L-r circuit. ) With their C7, C8 we adapt the resistance of aerial....
The main part of this circuit Doorbell two timer NE555 ICs. When someone hit the switch S1 momentarily, the speaker emits a sound of the bell, if the time period of the monostable multivibrator built around IC1. When the switch S1 pressed, IC1 is enabled in....
This is a status panel driver circuit. This circuit is used to turn on lamps or LEDs in a graphic panel that represent faults, action, and status of an....
This is a switched system, meaning it doesn`t have a sequencer like modern electric furnaces. Instead, relays are used. Maybe this is a good upgrade to make, installing a sequencer. The blower is a 5 speed blower, although only two seem to be used (unlike....
Maybe you ever use LM555 as timer project before, yes it also nice if you want to make analog timer using LM555. According datasheet LM555 this IC can use for several purpose in electronic project like to adjust timer according time needed. From figure 1....
Powering the system is required by many applications while charging the battery simultaneously. Interaction between the system and charger may result in a....
Processor based systems usually require a voltage supervisor chip to produce a clean reset pulse to the processor whenever a brown-out` condition of the power supply is detected. More complex designs employing multiple power supplies can be unreliable if....
Circuit likes sampled output of multiplexer and provides current required for driving transfluxor in analog-digital converter that produces six-bit binary Gray code. -N. Aron and C. Granger, Analog-To-Digital Converter Uses Transfluxors, Electronics, 35:20,....
I am using the UCD90124/A, among other things, to monitor multiple voltages. Several of these are > 2. 5v so I have scaling circuits so as not to violate the 2. 5v max on the Mon inputs. My question is, do I enter the raw voltage values in Fusion for such....
For normal wailing tone, short D1 and open R2. For fast rise and slow fall in frequency, include D1 and R2. Use of a CD4046B with a diode-RC network as shown produces a siren tone, using a VCO. ..
I have since constructed a programming "jig" to avoid keeping the circuit on the breadboard. More detail, and photographs can be found on the Learning About the AVR Parallel Programmer page. ..
Stationary - MOPLL & Silicon Tuner TUA6020 2 Band TV Tuner Mixer-Oscillator-PLL with balanced IF-Amplifier The TUA6020 device combines a digitally programmable Phase locked loop (PLL), with a mixer-oscillator block including two balanced mixers and oscilla-....
This is a design circuit for measure inductance of the inductor labeled LX which is the inductance to be measured. The o/p of the circuit is a TTL square wave whose frequency relates to the inductance being measured. The inductance meter adapter output is....
The circuit is built around two 555 timer ICs. U1 and U2. U1 is wired as a variable duty cycle oscillator with a constant time period of around 0. 1 second. Duty cycle can be varied from 0 to 100 per cent by R4 potentiometer. The output of U1 (pin 3) is....
The video circuit illustrated in Figure 1 combines an audio-subcarrier notch filter and group-delay equalization as required by the ITU-470 standard. It also includes an amplitude-adjustment capability for driving an RF video modulator in NTSC applications.....
Bipolar transistor amplifiers must be properly biased to operate correctly. In circuits made with individual devices (discrete circuits), biasing networks consisting of resistors are commonly employed. Much more elaborate biasing arrangements are used in....
Electric locos derive tractive effort from Traction Motors which are usually placed in the bogie of the locomotive. Usually one motor is provided per axle but in some older generation of locos two axles were driven by a single Traction Motor also. However....
Triangular wave generator in this website has more advantage triangular wave with maximum peak level and minimum peak level circuit diagram and description of triangular wave generator...
This basic oscillator will detect the Earth magnetic field. The ferrite rod and coil are taken from an old Medium Wave receiver and a small magnet is glued at one end. Tune to a medium wave commercial station until you hear a beat note. Any movement of the....
This continuity tester gives a beep sound if detect an electric current conduction between its probes. Here is the schematic diagram of this audible....
This low power fm transmitter is designed to use an input from another sound source and transmits on the commercial FM band. This low power fm radio transmitter it is actually quite powerful The first stage is the oscillator, and is tuned with the variable....
This LED flasher circuit is a classic two transistor flip flop. This flasher circuit is very popular and it`s usually the first circuit to build when starting electronic circuit building hobby. Here is the schematic diagram of the famous LED flasher circuit:....
Circuit diagram is a simple but effective circuit intercom circuit is based entirely on transistors. Circuit diagram is based on three stages plus RC amplifier. When the pushbutton S2 is pressed, the amplifier cord around T1 ...
This design adopts a well established circuit topology for the power amplifier, using a single-rail supply of about 60V and capacitor-coupling for the speaker(s). The advantages for a guitar amplifier are the very simple circuitry, even for comparatively....
This is a programmable alarm timer ambit that uses alone LEDs to announce hours and minutes. 12 LEDs can be abiding in a amphitheater to represent the 12 hours of a alarm face and an added 12 LEDs can be abiding in an alien amphitheater to announce 5 minute....
I`ve decided to start selling these on ebay to raise some money for parts. Here`s a link to the current auction and here`s a photo of the current model: Switchgate is a simple dual gate based on a 556 in monostable mode (with trigger input), with the....
The IR detector (IC3) controls an LM 7555 CMOS timer (IC2) which operates in mono stable mode. When the beam is broken, IC2 is triggered and its pin 3 output goes high for about half a second. This extinguishes LED1 and turns on transistor Q1 to drive a 5V....
This is a vocational training report on Ultrasonic Proximity Detector undertaken under at Bharat Heavy Electrical Limited (BHEL)in partial fulfillment of the requirement for the Bachelor in Electrical engineering. The report covers topics like Making Printed....
Oscillator Cores (cClappCore, cHartleyCore, cModifiedClappCore, and cModifiedColpittsCore) are compatible with simulation and measurement setups outlined by the Generic Oscillator Example. These core oscillator circuits are configured for low resistance....
Flight Computer V1. 0: B1 PC Board U1 80C32 microprocessor U2 27C256-12 32Kx8 ROM - 120nS U3 74HC373 U4 LM340T-5 5v regulator (might be a 7805 part) U5 43C256-15 32Kx8 RAM - 150nS U6 74HC00 T1-T4 2N6045 or 2N6044 darlington output transistors Y1 11MHz....
The diode tube we are about to study is really Edison`s old incandescent bulb with the plate in it. Diode means two elements or two electrodes, and refers to the two parts within the glass container that make up the tube. Within a few years after the....
Function: for driving small UHF TV transmitters, with gain is 7dB and can amplify a signal between 470-860 MHz. Component: Resistor, Capacitor, Transistor, ....
Avoid drilling extra holes and making changes to the chassis and pcbs by all means. This will decrease the value of your amp since you will not be able to restore it to the original state anymore. Make sure to take pictures of the original state of the amp,....
This is one of the most basic 555 circuits. This circuit is part of this chips datasheet, complete with the math needed to design to specification, and is one of the reasons a 555 is referred to as a timer. The green LED shown on the illustration lights when....
This is an original design for an interpolating scanner, a circuit with a number of signal inputs, a control voltage input and a signal output. The output effectively selects between the inputs, fading from one to the next, as the control voltage rises. A....
Snap all connectors on to the flat cable (a small vice will do the job). You get an instant male-male, male-female, female-female serial adaptor, plus a short extender cord. A must-have tool if you`re planning to play with serial ports. You can even put an....
Switching regulators work by drawing small amounts of energy from the input source and transferring it step by step to the output. This task is attained by using an electronic switch (operating at a predetermined frequency) which works like a gate between....
Because of this audio mixer, I can compare the various receivers just by twiddling the gain controls. No switching required. Makes A/B comparisons a snap. (They are all driven by the same antenna). All of this used to be easy I just used a different speaker....
DAC is short for Digital to Analog Converter. In this article we play around the code Michael Smith created for a PWM based DAC. I modified his code so that other DAC options could be tried. I compare the 8-Bit PWM DAC with the R2R DAC at various numbers of....
Main matched LG26 one inch of screens of FSP107-2PS01 two-in-one electrical power package, direct drive CCFL modulator tube, its material object is shown as in Fig. 1. If cooperate with other producers For instance Samsung, AU, etc. Screen at, it is only at....
The following circuit shows about DTMF Remote Domestic System Control Circuit Diagram. Features: DTMF signals can be transmitted over a radio to ....
This mic preamp uses the low noise IC uA739. The circuit is an example of how a good preamplifier can be designed for dynamic microphones. The IC houses two identical integrated preamp circuits. The second preamp is used in identical manner This mic preamp....
The schematic that this is based on is my own, so it is free from Intellectual property restrictions. It is based around a 555 timer (so it could be an extension of the recent "Know Your 555 timer" article), and uses an ubiquitous LM386 audio amp so it can....
A relay circuit to function as a DPDT toggle which is controlled by a momentary switch. I strive to keep my circuits simple with little or no integration (555`s, transistors, etc). The circuit is shown active or on mode. Half of RL1 and RL2 manipulate the....
Circuit diagram of this simple in design for high voltage DC Impedance. This is a circuit diagram with circuit design that was built by uA741 IC. IC is the op-amp non-inverting DC amplifier. IC that has a negative feedback through the DC meters need to 1mA....
The circuit was designed to create a line preamplifier by acquiring the use of double triode tubes. The circuit comprises of three parts, the main preampl....
This is the seventh part of an ongoing series about building a low cost, open source streaming internet radio. If you haven`t already, check out the previous parts (see the links at the end of this article) for some background about the project. In part six,....
I have an 01 Civic EX. A/c blew very cold. On a hot day ran into a store, came out to start the car and it blew hot air. Checked the fuses and all seemed fine, but just hot air. Took it to two mechaniscs, both said the compressor was fine and coolant was....
Nixie tubes were used for numeric - and sometimes alpha - displays back in the days before LEDs and LCDs. They were more light bulbs than tubes, but were encapsulated in evacuated glass shells like vacuum tubes and had round, multi-pin bases like tubes.....
This circuit features automatic Exit and Entry delays and a timed Bell Cut-off. It has provision for both normally-closed and normally-open contacts, and a 24-hour Personal Attack/Tamper zone. It is connected permanently to the 12-volt supply and its....
Multisim is the simulation software of circuit based on SPICE, SPICE Simulation Program with Intergrated Circuit Emphasis lay particular emphasis on the simulation program of the integrated circuit Abbreviation, it is here 1975, from University of....
The following circuit shows about Robotics IR Navigation Sensor Circuit Diagram. Features: one chip 74HC04, IR sensor will work in direct sun ....
Small and portable unit, Can be built on a veroboard The amplifier s gain is nominally 20 dB. Its frequency response is determined primarily by the value....
This is a simple single zone home Alarms Systems circuit. Its features include Entry delays, a timed Siren Cut-Off and and automatic Exit. It`s designed to be used with the usual types of normally-closed input devices such as - - foil tape - micro switches -....
This is an article written by a one of my readers, Yash Tambi, Core Committee Member, roboVITics. Do read this post and pitch in your comments below regarding this. Thanks! RF controlled bots are the most simple of their kind. All you need are a few ICs,....
This circuit charges two NiCad cells with a constant current and features dual charging rates, voltage cutoff and an audible alarm. The circuit is powered....
This Homemade GSM Car Security System super simple circuit design of a GSM car security system really works....
In order that the MonomeSerial software `sees` the monome clone, it`s necessary to change the serial number of the arduino`s EEPROM to resemble the serial number of a real monome. I successfully followed Melka`s instructions that have been posted on the....
The Mainline ST-5 was originally Introduced in the RTTY JOURNAL in May, 1970. It has rapidly become one of the most popular demodulators for RTTY. As back issues have been un available for some time, the original article is being reprinted. For those....
The 5 V from USB seems to be powering the led on my laptop power brick. Hence even when I switched the power brick off at the wall outlet, the led is still on. When I unplug the USB it goes off but comes back on again as soon as I plug it in. Do Ijust but a....
