Top Circuits Page 131
- Page 131
-
So here is another improvised model circuit that will eliminate the unwanted DC offset voltage from the output that affect the previous one discussed. By the way, all previous circuits that I discussed were intended as low power class d amp source that is....
-
-
-
-
Remotly check the temperature of a few things, in my case the repeater site at GB3PY. A system which used a radio to receive requests for the currenttemperature and send the results back to the user. Requests are by DTMF tones and the response is in CW,....
-
-
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....
-
-
A source code for a very simple PIC based digital timer. The actual hardware of the project isn`t with me anymore. I will rather demonstrate it using my DIY PIC16F628A breadboard module and I/O board. The complete circuit diagram along with the firmware....
-
A digitalmultimeter is a very useful instrument that combines several measurement functions in one unit. A typical multimeter includes features of a variable-range ohmmeter, voltmeter, and ammeter. Some of them also include capabilities of testing diodes and....
-
A servo motor is a special geared DC motor equipped with an electronic circuit for controlling the direction of rotation, as well as the position, of the motor shaft. Because servo motors allows precise angular positioning of their output shaft, they are....
-
-
When you are using LCD in 4 bit mode you have to send data two times where in 8 bit mode you only have to write once, this ultimately keeps your microcontroller more busy with LCD. If you are doing only a few things with your microcontroller then its ok you....
-
-
Figure 1 is a schematic of such an arrangement with four batteries. The diagram in Figure 2 uses one voltmeter and a two-pole multi-position rotary switch to select the battery to monitor. While accomplishing the goal of bringing the metering of batteries....
-
This is a gadget that will estimate the amount of water left in the water tank of a caravan or camping unit....
-
This project replaces the electronics in a standard quartz wall clock with a circuit that uses GPS satellites to get the precise time....
-
Its main feature is a selection of outputs at standard fixed voltages used in electronics. Because the outputs are fixed you do not have to worry if the voltage is correct, you just plug the wire in. It is quick and easy to use. You will probably still need....
-
The Intelligent Fan Controller will control the speed of computer fans based on the temperature inside your computer and reduce the noise made by your computer Intelligent Fan Controller 4-wire 2-wire 3-wire speed computer pic microchip PIC18F2550 18F2550....
-
The GPS Car or Boat Computer can display a wide range of GPS related information for the driving or boating enthusiast. In this page you will find everything that you need to know to build the unit. This includes the design, schematic, parts list, PC board....
-
-
A matching Yamaha T-760 tuner. It sounds (and obviously looks) great with the A-760. The cost was 6 euros, plus 16, 20 euros for shipping from Austria. 31-12-2006: Put back an X2 RFI capacitor, cleaned all the switches and pots with De-Oxit, re-checked and....
-
-
-
Adjustable 5A Step Down 5 MHz switching regulator circuit can also be used to overcome such problem. It uses ST1S03 step down DC-DC converter.The ST1S03 can also be used to power low-voltage digital core in HDD application. With input voltage range 3V to....
-
A band-width limited amplifies shapes the waveform sampled by the 40 MHz high speed, pipeline Analog to Digital Converter (fast ADC, or fADC). It is well known that the shaping time is twice the time constant (peaking time), per pole of the filter network.....
-
One of the primary things i wanted to do with my Arduino was turn my generators into motors. My simple generators were not simple to turn into motors but this proved to be particularly tricky with my three phase generator. Doing this requires me to create a....
-
Breadboard and test the DIY IR jammer last weekend but it`s taken me this long to carve out a minute to post the results. The schematic is correct and only took a few minutes to re-create on the plugboard. For power I used a small bench supply set to 6 volts....
-
-
-
-
-
-
Circuit diagrams for both a Bosch and a Delco-Remy Starter-Generator (yes, the circuits are different). Unfortunately, due to a computer crash, I lost both the diagrams and his E-mail address. However, I was able to recover the E-mail and the diagram in May....
-
The driver files are located in the Si570AVR-USB-Driver folder inside the zip. Extract them into a new directory, and connect the RX board`s USB cable to a USB port. When prompted for the driver location, navigate to the extracted files and let windows....
-
Below is the main schematic of the RX + Xtall V9. 0 SDR. The schematic has been partitioned into separate stages, each of which is covered in a separate page of build instructions in this web site. You can click on each shaded area and view the corresponding....
-
The Softrock Lite V6. 2 series provide an economical entry-level kit for the ham or SWL who wants to experiment with Software Defined Radio (SDR). As of 10/26/2008, the offerings in this series are (links are to schematics in Yahoo Groups files folder ):....
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
The power supply is pretty mundane. The 110VAC comes in on connector N17 and is hooked in series with a power switch SW1, a fuse F1, and the primary coil of transformer T1. The secondary coil of T1 produces 24VAC at 12 Amps and is routed through the full....
-
The power supply takes its power from a 24-volt VDC wall wart either via N1, an on board connector, or via N10 an off-board connector. The power switch is either mounted on board or off-board via connector N2. The fuse can either be on board at F1 or off....
-
The 5 volt microcontroller interfaces to the RS-232 serial connector and the USB-B connector. It is also responsible for talking to the checker, controlling the status LED`s and setting the voltage for the LOW voltaage microcontroller. The low voltage....
-
The purpose of the layout control mother board is to provide a simple way to allow people to control portions of their layout. The layout control motherboard consists of a single microcontroller that interfaces to the MRNet bus and a number of slots into....
-
The Camera1 module provides a RoboBricks2 bus interface for a General-Vision Cognisight MTVS vision system. This module a builtin camera and electronics for recoginizing features in an image. The recognition hardware is based on neural network technology. At....
-
The bus is connected to the 2G—5 shrouded conenctor N9. The two CAN bus signals are fed into the PCP2551 CAN bus transceiver U2. The output of U2 is fed to the UART transmit and receive signals on the PIC16F688 microcontroller U1. 8-pins of the U1 are....
-
The logic power and CAN signals come in from N4 pins 3 through 8. The CAN signals are connected to the MCP2551 CAN physical layer IC, U5. The transmit and receive pins of the microctroller, (U4 pins 5 and 6) are connected to the other side of U5. Lastly, the....
-
The Laser1 RoboBrick is a module that is designed to allow the use of a slightly modified laser pointer to detect passive refector beacons at a distance of approximately 10 meters (or about 32 feet for the metrically impaired. ) It is meant to be used in....
-
-
In pure servo mode, it is expected that up to 4 unmodified servos are attached to the board. The four servos can be independently controlled. There is current feedback on all four servos. In differential steering mode, the module can control up to 4 servos.....
-
This is a glove that plays a very competitive game of Rock Paper Scissors against the wearer. It learns how they wearer plays and plays to their weaknesses. Why I`m nottotallysure. Chasing down the source of inspiration is often impossible, but sometimes a....
-
Then I learned to drive it. Turns out my greatest enemy is inertia. What I`ve built is just so damn heavy and massive I can`t just start off the motor at full speed. Being a half-assed physicist I should know that already. But I guess experience is also....
-
This solar tracker circuit is an open source circuit and anyone may edit the circuit to his/her own preference. Watch the video for other useful information regarding features the solar tracker does and does not include that you may have to implement yourself...
-
This chapter contains circuit diagrams for several power supplies for pulsed solid state lasers. These include units suitable for driving the popular Hughes ruby and YAG rangefinder laser assemblies as well, one using the flash from a disposable pocket....
-
My task for the system was to implement and program all the hardware devices and make data available to the receiver program running on the PC. This includes the configuration of all Prospeckz devices and implementing protocols for radio transmissions....
-
This circuit lets an external 12V SLA battery power a camcorder which normally has an inbuilt 7. 2V battery. Such batteries can now be very difficult or expensive to obtain for earlier model camcorders. In essence, the circuit is a standard LM317 adjustable....
-
-
This is Infrared Remote control transmitter circuit has high performance and can be applied to works with the various infrared receiver circuit. To made easily. And best to save your money. - Then another circuits, is designed to have wider applications. Can....
-
-
Tube Tester and Filament Burn In Jig - Here`s my answer to cooking the tubes for days and then testing them before inserting them in an amp. Note - I have learned an important lesson with this jig. The filament alone heats the entire bottom of this tube and....
-
-
More and more serial bus systems are preferred instead of a parallel bus, because of the simpler wiring. As the efficiency of serial buses increases, the speed advantage of the parallel data transmission gets less important. The clock frequencies of SPI....
-
This document has several purposes, and a primary one is to record what I have learned about the means that a Scooba robot uses to detect: a) the presence of an acceptable cleaning solution being delivered to its pump, and b) the excess presence of used....
-
Here is a simple circuit which can be used for decoration purposes or as an indicator. Flashing or dancing speed of LEDs can be adjusted and various dancing patterns of lights can be formed. The circuit consists of two astable multivibrators. One....
-
The circuit shown above can be used to control a unipolar stepper motor which has FOUR coils (I`ve swiped it off an old fax machine). The above circuit can be for a motor current of up to about 500mA per winding with suitable heat sinks for the SL100. For....
-
This circuit utilising a 555 timer IC can be used as an alarm system to prevent the theft of your luggage, burglars breaking into your house etc. The alarms goes ON when a thin wire, usually as thin as a hair is broken. The circuit is straightforward. It....
-
Here s a design of the circuit diagram of RS422 interface. Connector K1 is linked to the serial port of the PC, power to the PC side of the circuit is derived from the signal lines DTR and RTS. Positive supply is derived from RTS and negative supply....
-
This is a design circuit for simple function generator. Built around a single 8038 waveform generator IC, this circuit produces sine, square or triangle waves from 20Hz to 200kHz in four switched ranges. There are both high and low level outputs whic ....
-
Here s the design circuit for pulse position modulator can be easily built using 555 IC. Here s the figure of the circuit; .Pulse position modulator modulate the on-period while keeping the fixed off-period. Pulse position modulation might subs ....
-
Here`s a design for a simple 1KHz square wave generator using a few components and the LM3909 that is useful for testing audio equipment. The circuit is based from the IC. It is powered from a single 1. 5V battery cell and the maximum amplitude of the output....
-
Here s a design circuit that is used to active circuitry and an analog meter to make sensitive DC current measurements. A reader subsequently asked if it could measure AC microamperes and that is what spawned the idea. This is the figure of the circu ....
-
This is a design circuit for tone control circuit. This is the figure of the circuit;..The LM1036 is a DC controlled tone (bass/treble), volume and balance circuit for stereo applications in car radio, TV and audio systems. An additional control in ....
-
This is a design circuit project for a clear glass sensor circuit can be used for experiment/hobby purposes. The concept is very simple and is based on a home-made sensor unit comprising one high efficiency ultra bright red LED (D1) and a standard ph ....
-
This is a design circuit of audio amplifiers with DC coupling to the load are not often encountered these days, even though they offer definite advantages. One advantage is that there is no need for the complication of a second (symmetric) power supply;....
-
Here`s a design circuit that is intended for carrying out harmless experiments with high-voltage pulses and functions in a similar way as an electrified fence generator. The p. r. f. (pulse repetition frequency) is determined by the time constant of network....
-
This is a design circuit for high frequency waveform generator is very useful in electronic experiment and design. This circuit is generate sine wave oscillation, but actually we can modify the circuit to generate triangle or square wave function. Th ....
-
This is a circuit that used to main pulse. The pulser is intended to switch the mains voltage on and off at intervals between just under a second and up to 10 minutes. This is useful, for instance, when a mains-operated equipment is to be tested for long....
-
This is a design circuit for modular arrangement that allows the amateur to choose only the modules more suited to his requirements in order to build a chain one to five modules long. For the minimalist, the Control Center module described in this pa ....
-
Here s an amplifier circuit that based on the BUZ11 can be replaced by an IRFZ34N and an ECC83 can be used instead of the ECC88. In that case the anode voltage should be reduced slightly to 155 V. The ECC83 (or its US equivalent the 12AX7) requires 2 ....
-
This is a design for simple circuit of the tilt sensor alarm presented here can be fabricated using readily available inexpensive components. The circuit is a true transistor based design. Home made Tilt sensor for this circuit is an ordinary little....
-
Here s a design of signals logic tester that is using indicate on a common cathode seven-segment display, if entry is at logic level ""1"" (one H on the display) or logic level (one L on the display). If an undefined level is detected will display ....
-
This is a design circuit for temperature relay that can be used to signal a fire or set point for temperature monitoring function. You need to adjust P1 so that T1?s base voltage is 0.5V smaller than the emitter voltage at a temperature a little bit....
-
This is a design circuit for temperature to digital converter circuit that is based control by LM35 IC. This LM35 is precision integrated-circuit temperature sensors, whose output voltage is linearly proportional to the Celsius (Centigrade) temperatu ....
-
Here s a design circuit for linear opto coupler circuit that is based on MOC5010 and can be used to isolate a circuit from main grid, audio interface, in medical electronics and many other applications. Here s th ....
-
The simple battery charger circuit design shown here uses the versatile IC 555 as the main component. The circuit can be used for charging all types of rechargeable batteries within the specified limits as given in the article...
-
-
Although the voltage across the two pins of our microphone will fluctuate based on the input sound, we would like to amplify this so that the Arduino can actually read the signal. This can be a bit of a complex circuit to think about at first to we will....
-
The CT Scanner is the abbreviation of computer tomography scanner. The invention of CT Scanner in 1970 was made possible by a previously established insight and development of the dedicated minicomputers. A high DC voltage is applied to the capacitors an....
-
For months I`ve been looking for a simple FM BUG project, the ones online require inductors which you either have to acquire or build, if you don`t have a LCR meter it becomes rather hard to get the circuit working, specially if you`re a beginner without an....
-
As my first electronics-related entry, I would like to share a modification of the current limiter add-on by Ron J. The original circuit works as advertised, however I needed to disconnect the load immediately after the maximum current was reached, what I....
-
This is the first oscillator I ever built. I remember looking at books and magazines, schematics on the net, etc. They wereall either colpitt or hartley oscillators. Generally speaking while they`re simple enough, they require the use of properinductors....
-
In order to make the circuit work, it is important to set the fuse bits inside the AVR micro controller correctly. Theses fuse bits can be set with the programmer that is used to flash the software. For those that are interested to understand the background,....