New Circuits Page 19
- Page 19
-
To complement the 60 Watt MosFet Audio Amplifier a High Quality Preamplifier design was necessary. A discrete components topology, using + and - 24V supply rails was chosen, keeping the transistor count to the minimum, but still allowing low noise, very low....
-
-
-
This circuit breaks an input voltage signal down into its components: (1) the absolute value and (2) the polarity or sign` (+ or ). It will handle direct input voltages as well as alternating voltages up to several kHz. With a supply voltage of ±9 V, the....
-
The output current issensed across R8, This is delivered to the current-limit arrtplifier through R7, across which the foldback potential is developed by R6 with a threshold determined by D4. The values given limit the peak power below 20 W and shut off the....
-
This display uses ten LED`s to display a voltage range from 10. 5 to 15 volts. Each LED represents a 0. 5-volt step in voltage. The heart of the circuit is the LM-3914 dot/bar display driver. Trimmer potentiometer R5 is adjusted so that 7. 5 volts is applied....
-
Don`t like your little brother`s TV channel selection Hate the volume your wife sets the stereo at Want to just annoy someone This circuit does all that and more by jamming most IR remote signals. The circuit releases a flood of pulsing IR light that....
-
-
-
The circuit shown earlier in figure 2-6 and the discussion in previous paragraphs were for illustrative purposes only. In reality, such a circuit would not be practical. However, the basic principle involved (the change in reactance of an oscillator circuit....
-
The RF modules used in this schematic are very simple, with only a few extra pins required for power, ground and data. The main parts used in this schematic are the RF transmitter module, RF receiver module, 18F452 and 18F4520. You can see them below, as....
-
-
This circuit will amplify voice audio in the range of 50 to 10, 000 cycles with little distortion, and have the ability to drive a low impedance load to 16 ohms. The circuit will run from 6 to 15 vdc and give about 20 dB of gain. To build an inexpensive....
-
-
The Over-the-Top type of operational amplifier is ideal for use as a current sense for battery charger applications. The design described here can be used....
-
-
-
Apex seems i begin to love this amp the corrected clear schematic is this with different R14 values(tried 22k,30k,56k) and different supply....
-
The first option is of course a zener. I actually have a bunch of 2. 2V which would protect the capacitor fine. The problem is, of course, half the energy is going to be wasted across the diode short. Is there any way I can regulate the voltage below 2. 3V....
-
This is a revised version of my LM35 based digital thermometer project that I posted last year. Although it is one of the simplest projects, it is very popular among newbies who are just starting to learn microcontrollers. There was a little flaw in the....
-
After the recent pretty disappointing results with a transformer-based Component Tester, I`d like to try and generate a ± 10 V sine wave at approximately 50 Hz in some other way. Using as few components as possible. This is where we enter, eh, squarely into....
-
-
8051 provides a transmit channel and a receive channel of serial communication. The transmit data pin (TXD) is specified at P3. 1, and the receive data pin (RXD) is at P3. 0. The serial signals provided on these pins are TTL signal levels and must be boosted....
-
A 100 second delayed turn ON relay RL1 switch, if plug power +12V in circuit. In Fig. 2 see a two range 6-60 second and 1-10 minute auto turn off relay timer circuit, with 555...
-
Take a look at this fm spy transmitter which can be used as a bug transmitter or as diy fm bug too. It uses a single IC 74F13, one coil, a capacitor, one t...
-
-
This stereo balance indicator circuit diagram is designed using few common external components. The schematic circuit is very simple to build and will provide an visual indication with LEDs for left, right and center balance. Outputs from each channel are....
-
A 1000 Watts Audio power Amplifier circuit for my outdoor use so I dont have any circuit diagram so if your having it then plz. its very urgent somehow I want to build it, its my passion, building an amplfier of high power..
-
The Traffic Light Hack is a simple interface for controlling lights inside a traffic light enclosure. No, not a real light out on the street. This one was picked up at a flea market, and it`s hanging in my room. It is designed to be an ambient information....
-
The very small DC voltages at the output of the diode detector are difficult to amplify accurately. DC offsets introduced by any op-amp are the main culprit. Low frequency noise (1/f noise) is another. Chopping the DC with MOSfet switches is an excellent way....
-
A Video Switcher which can be controlled using the computer`s parallel port. Unfortunately, fewer PCs are fitted with parallel pors these days and, for a laptop, it`s not really an option so the need to control the Switcher through a USB port became....
-
This current-limiting circuit, shown in this example as part of a small bench power supply, could in principle be used in conjunction with any dual-rail current source. The part of the circuit to the left of the diagram limits the current at the input to the....
-
The basis for this amplifier is published as Project 03, and makes no claim to be state of the art in fact the base design is now over 20 years old. It is a simple amp to build, uses commonly available parts and is stable and reliable. The design featured....
-
This article is of interest only to readers whose bicycle lights are powered by a dynamo. The laws on bicycle lights in the United Kingdom are stricter tha...
-
-
-
-
-
The two optical sensors will give person count to the microcontroller and microcontroller will give this value to MCU-II. The microcontroller will sense the entrance of any person from high to low pulse on input pins (A3 and A4)..
-
*We were inspired by the following project, and looked at the code for it, but ended up developing our own. However, if you are interested in making an umbrella that plays musical notes due to press, this is a great page: For more information about the 4051....
-
It functions like almost any 555 astable timer, except that the LED is inserted into the capacitor reset path so that when pin 7 discharges C1 to common, this relatively high current must pass through the LED. In this way, the average battery current is only....
-
Since this is a DC circuit, how and where do the + vs. the - wires physically get connected to the circuit Where exactly do I connect all the grounds to I understand all the places where the schematic calls for a connection to the power source. I`m just....
-
In rainy seasons, it is very annoying that wiper of your car wiping instantly all the time. Have you ever think of speed control of the wiper. There are wiper control modules available on the market but most of them are costly. So here is an automatic wiper....
-
This past summer I saw Transformers: Revenge of the Fallen and I was inspired to build an enclosure for a vacuum tube amplifier that incorporated the Decepticon logo. The tube amplifier replaces a solid-state amplifier which was driven by a tube....
-
Improved 3 Transistor Audio Amp , The load resistor for the driver transistor is tied directly to the + supply. This has a disadvantage in that as the output moves positive, the drop across....
-
CA081 and CA3140 BiMOS op amp offer minimal loading on the circuits being measured ‚The wide bandwidth and high slew rate of the CA081 allow the meter to operate up to 0. 5 MHz ..
-
-
The herein circuit shows basic configuration for bipolar stepper motor driving which can be applied using either an L293 or an L298N. This circuit shows that a single device can be used to drive a two phase bipolar stepper motor..
-
Have you ever wanted to run a TV, stereo or other appliance while on the road or camping Well, this inverter should solve that problem. It takes 12 VDC and steps it up to 120 VAC. The wattage depends on which tansistors you use for Q1 and Q2, as well as how....
-
Fresnel lens a thin disc of glass or plastic carrying a series of concentric stepped rings, each successive step from the central ring having the surface curvature of a much thicker lens Fresnel lens Fresnel Lenses for Rear Projection Systems, Film Fresnel....
-
-
-
This is yet another project born of necessity. It`s a simple circuit, but does exactly what it`s designed to do - dim LED lights or control the speed of 12V DC motors. The circuit uses PWM to regulate the effective or average current through the LED array,....
-
This following circuit shows anpower supply wiring diagram for Nissan 300ZX, sport car called as Fairlady Z. Component: lighting switch,ECCS, fuse ....
-
This is one of the most neat projects to build using a PIC. The design of the clock is mainly a clone of Bob Blick `s propeller clock, along with a few modifications of mine. I used a PIC16F84A microcontroller. I`d have to admit that the programming end of....
-
This is a really simple sound effect generator based single sound generator chip UM3561. The UM3561 will generate four kinds of sound effects. The basic operation is that the UM3561 will generate the sound signal, then the signal delivered to 2N3706 (as....
-
-
One of the largest sites for do-it-yourself guitar effects builders. Schematics and Printed circuit board layouts for rare pedals like the Tycobrahe Octavia, Clyde McCoy wah and lots of vintage fuzz pedals!....
-
This schematic diagram is about TMP01 Fahrenheit Scale Temperature Sensor circuit. This circuit is used to convert VPTAT into an output that can be read....
-
Connected 0. 1uf cap and 500uf electrolytic cap to transmitter and the same to receiver. The result was it still does not work. I tried to add just diodes but it did not help either. when u say it doesent work-what is happening when the ir is recieved by the....
-
This article explains how to build the second improved version of the HDR-Jack. In contrast to the original circuit this version is powered from a lithium coin battery. This results in compatibility with cameras not supported by the first version, because of....
-
-
It is a very simple data logger project based on PIC12F683 microcontroller. The microcontroller reads temperature values from a temperature sensor on a regular interval basis and stores them into its internal EEPROM memory...
-
This car audio stereo amplifier can deliver up to 30W on each speaker and it is build with TDA7394 from Philips TDA7394 datasheet....
-
-
-
-
-
Use this in your garden and listen for any unusual sounds, or maybe just wildlife noises. If you have a car parked in a remote location, the microphone will also pick up any sounds od activity in this area. The cable may be visible or hidden, screened cable....
-
This Simple Portable FM transmitter includes a limiter, a microphone amplifier and a PLL digital tuning. All the components are placed on one circuit board. The RF power is switchable between 1 W (HI) and 0, 2 W (LO). The schematic diagram is split into 3....
-
Modern power control systems utilize electronic devices like Thyristors for power switching, phase control, chopper etc. These devices also find applicatio....
-
-
The input cap for The phototransistor at the bottom is what feeds the opamp. But the output from the phototransistor is always between GND and Vcc. So why the need for an input capacitor It`s most likely there because the photo transistor is not being....
-
The input stage of this voltmeter circuit uses operational amplifier and diode feedback to form linearity peak value rectifier circuit. Through R2/R2 partial pressure isolation, it is sent to double multi-channel BCD output A/D converter CA3162E, it also can....
-
I have managed to let the stock ATS-3A transceiver transmit nice BPSK31 "cq ok1iak". The firmware of ATS-3A was modified to allow serial line control, which is performed over the DASH paddle pin in straight key mode. That means paddle will not work if in....
-
The VNGBOX micro needs to produce a very accurate, high resolution and very noise-free DC control voltage to steer the reference oscillator phase accurately. Any noise on this signal will result in noise on the reference; any non-linearity, especially any....
-
The first part of this paper describes the high dynamic range CMOS (HDRC ®) imager a special type of CMOS image sensor with logarithmic response. The powerful property of a high dynamic range (HDR) image acquisition is detailed by mathematical definition and....
-
Electronics Tutorial about Multivibrators including Monostable Multivibrator Circuits, Astable Multivibrators, Bistable Oscillators and Clocks....
-
-
This article aims to show you how to control a DC motor though an H-bridge driver chip using the PWM output from a PIC to achieve speed control. Although I am using a PIC microcontroller other controllers such as AVR`s, Basic Stamps and certain Picaxe`s can....
-
-
1999 S10 2. 2L Fuse Box Quesion. There are two (what appear to be) main power terminals on the top left and top right on the Fuse Box. Which terminal is the full time power terminal and which is the RUN power terminal Vehicle was a basket case and I am....
-
-
Buffering for the zener is provided by the impedance matching and current amplifying characteristics of the emitter follower and draw less current from it. To....
-
-
Using the LTC4000 high voltage controller designed by Linear Technology, can be designed a very simple high current LiFePO4 battery charger that will provide a fixed output voltage of 12 volts at a maximum output current of 15 A. Features of the LTC4000`s....
-
The ISL62386 controller generates supply voltages for battery-powered systems. The ISL62386 includes two pulse-width modulation (PWM) controllers, adjustable from 0. 6V to 5. 5V, and two linear regulators, LDO5 and LDO3, that generate a fixed 5V output and a....
-
Current loop analog data transmission is used in industrial environment because of its robustness (good noise immunity), while providing wiring fault detection....
-
Construction of a 1-Wire Barometer. This page shows the circuit, and gives construction and calibration details. This barometer connects to a Dallas Semiconductor 1-Wire network...
-
STK4038 bassed 60 watt audio amplifier circuit project and explanation Using the STK4038X audio amplifier IC, can be designed a very simple high power and efficiency audio power amplifier. This circuit is manufactured by Sanyo Corporation and will provide a....
-
Frequency modulation (FM) can be used to transmit analog voltage level signal with good noise immunity. The transmission itself might employs different....
-
The Pearl CH-02 Chorus is a long discontinued pedal with a superb sound. It has 4 knobs: DEPTH, SPEED, TONE and MIX BALANCE. The TONE knob only adjusts the tone of the effect sound and The MIX BALANCE adjusts the mix ratio between the direct and effect....
-
Monitoring current on inductive loads is a common task. It`s easier to do on the low side of a driving circuit, because a simple resistor can be used with an op-amp on the ground rail. The high side often demands that an expensive current sensing transformer....
-
An ordinary energy system comprises a generator and motor (common view), and can be completed with an electric current feedback as shown here in electrical circuit (a) In case (a), the system once started, will slow down and stop because of friction,....
-
This is a low cost fm antenna booster that can be used to listen to programmes from distant FM stations clearly. The antenna fm booster circuit comprises a....
-
To get the best from an NBTV signal it is important to use the full dynamic range of the signal with no crushing at black level or peak white. To check the linearity of a video path it is usual to use either a staircase or sawtooth test signal. The circuit....
-
A simple and convenient way to interface 2 relays for switching application in your project. This relay driver boosts the input impedance with a regular BC547 NPN transistor (or equivalent). Very common driver. It can drive a variety of relays, including a....
-
Use some tiny blinking LED`s as fireflies. It takes a bit of electronics skill to do this project but it comes out really wonderful. LED`s are tiny Light Emitting Diodes. Thisis a picture of one of the LED`s I used for this project. It is rather small but it....
-
-
The MOSFET`s could be in parallel pairs for even more power. Just give each its own 470 © gate resistor and a 22k © from each gate to source. The large 1000 µF capacitor and 47 © resistor used to clean up the voltage spikes coming from the transformer centre....
-
The T7024 is a single supply front-end IC especially designed for applications in the 2. 4 GHz to 2. 5 GHz frequency band. The front end consists of a Power Amplifier (PA), a Low-Noise Amplifier (LNA) and a Switch driver for a PIN Diode Antenna Switch The....
-
Using a PIC12F675, up to 5 outputs can be switched sequentially using a standard Remote Control pulse input of between 1 to 2 ms. Although any RC channel input can be used, it is especially useful when used with the rotary knob channels (usually 5 and above....
-