Top Circuits Page 150
- Page 150
-
-
-
-
-
-
-
-
-
-
-
Most Apple and Windows PCs can be put to "sleep" or "standby" mode while not in use rather than shutting them down completely. This mode has the advantage thatwhen they wake from sleep via keyboard or mouse activation, the operating systemrestores all....
-
This post assumes some knowledge of PCB etching methods and is an account of my experience with the toner transfer method. If this is new to you, you may have to get Googling on a few of things mentioned here. That said, I`ve linked to the sites I found most....
-
The LM35 series are precision integrated-circuit temperature sensor, whose output voltage is linearly proportional to the Celsius (Centigrade) temperature. The LM35 thus has an advantage over linear temperature sensorscalibrated in ° Kelvin, as the user is....
-
-
-
This audio power amplifier uses two complementary MOSFETs (IRF9520 and IRF520) to deliver up to 20W into 8 © speaker. A TL071 op amp is used as an input amplifier. The MOSFETs should be heatsinked with a heatsink of better than 50C/ W capability. THD is less....
-
-
-
This page describes the conversion of a simple, inexpensive green laser pointer into a lab-grade laser. The heart of this DPSS laser is an inexpensive green laser pointer. Such pointers are actually diode-pumped solid-state (DPSS) lasers consisting of a....
-
Microphone problem on Nokia 6630 usually caused by several reason, damaged microphone, broken path or line, and damaged the UEM IC. If the problem caused by the broken path in the microphone circuit, we need the Nokia 6630 schematic diagram to find the....
-
The circuit diagram and code on how to connect an 16x2 LCD to a PICAXE-18M2 microcontroller....
-
The circuit diagram and code on how to connect an 16x2 LCD to a PICAXE-18M2 microcontroller using the lower half of a port for the data lines....
-
A circuit diagram and sample code is provided to read and write to 74LC16B memory from a PICAXE microcontroller....
-
A circuit diagram and example code to implement and use the DS18B20 temperature sensor in PICAXE both in rounded and full12bit resolution....
-
A tutorial on setting up RS232 communication to PICAXE with circuit diagram, serial cable configuration, PC communication program setup and configuration and sample code for PICAXE....
-
-
THE circuit shown provides a smooth, piercing, wailing siren with a minimum of components. Not only this, but three spare gates of hex inverter IC1 remain, which means that a true cacophony could be created by running two sirens off the same i. c. Gate IC1a....
-
-
A prototype model of Agriculture Based Robot . Till recently the farmers were using age-old instruments in cultivating their lands. They themselves were putting the manuallabor. Hence there was thelabor problem. Farmer`s facing this type oflaborshortage.....
-
The wein bridge osillator employs as balanced wein bridge as the feedback network. Two stage common source amplifier provide 360 degree phase shift to the signal. The attenuation of the bridge is calculated to be 1/3 at resonant frequency. There for the....
-
I recently worked with an Audio Technology custom midrange driver. Since not many of us get a chance to work with drivers like this one I thought I post some pic and plots if case anyone found it interesting....
-
Although there are many different configurations for Crystal Oscillators, the most common are the discrete and integrated circuits Pierce and environment RLC Bridge. When needed very good frequency stability and reasonably simple circuits, the discrete....
-
The EN line is called `Enable`. This control line is used to tell the LCD that you are sending it data. To send the data to the LCD, your program should make sure this line is low (0) and then set the other two control lines and/or put data on the data bus.....
-
On this diagram, you can easilily locate test points related to Applied Voltage and Potential Voltage. For example, isolating one of the heating elements, we can see that there is an N. O. (Normally Open) switch shown wired in series with it, and the....
-
The following construction of low-frequency harmonic signal generator was necessary for debugging and measurement of audio amplifiers and other circuits,....
-
The infra-red (IR) toggle switch project described here is aimed to provide control mechanism for electrical appliances that do not have remote operation features. The goal is to construct a black box where you can plug-in your 120V AC appliance and control....
-
Ability to control lights and fans wirelessly has long moved from being an expensive proposition to having commonplace solutions neatly packaged and available for consumers. Even then, coming up with your own custom solution is a lot of fun for hobbyists and....
-
-
-
This is a simple ceiling fan regulator circuit diagram. It is used to control the speed of a ceiling fan. In the other words it is an AC motor speed controller circuit, as because its control the speed of a AC motor(Ceiling Fan). This ceiling fan regulator....
-
C1/C2 operating voltage should be elevated to 25V if you decide to go with a 12V energy source. Rule of thumb: the operating voltage of capacitors are at least double the supplied voltage, in other words, if the powersource is 9Volt, your capacitor(s) is a....
-
An electromagnetic generator without moving parts includes a permanent magnet and a magnetic core including first and second magnetic paths. A first input coil and a first output coil extend around portions of the first magnetic path, while a second input....
-
-
One spark gap (in a first version these were just copper wires bent into a ring at the end to suppress corona, the current design is somewhat more sophisticated and uses spherical electrodes), It produces a 300kV output pulse with a discharge energy of 36....
-
This is an electrical propulsion method with no moving parts which applies to any conductive fluid including water, liquid metal or plasma. Here I am demonstrating the principle with water. Essentially two electrodes in water have a current passed between....
-
circuit 1kz has an op amp component type with two inputs, output, and up and down ports, usually used for power supply rails. There`s also a buffer component type (which I think is provided by tikz itself, not the circuitikz library) which has one input and....
-
The 555 timer is an extremely versatile integrated circuit which can be used to build lots of different circuits. You can use the 555 effectively without understanding the function of each pin in detail....
-
I proposed a solar powered watering system for the plants to water them daily from the water butts by the greenhouse. As with all my projects, this has been work in progress for a long time now, but I have picked it up again with the intention of completion!....
-
An Instruction and Reference Book on Radio and Television, Coyne Electrical and Television-Radio School, 1951..
-
-
You can make an LCD show a brief moving message by interfacing it to a microcontroller. Here`s an AVR-based moving-message display that uses a 16G—2 LCD display incorporating HD44780. The 16G—2 LCD can display 16 characters per line and there are two such....
-
An RFID(Radio-frequency identification and detection) reader is a device which is used to communicate with RFID tags by receiving and transmitting signals. These signals use radio waves for wireless communication. RFID tag is applied to products, individuals....
-
Check the following IC`s7400, 7402, 7404, 7408, 7432, 7486. Visual Basic Program is used to show the results on the PC. The Microcontroller AT89S52 receives the IC number from the PC and check the Gates IC with the Truth table and sent back the result to the....
-
This project deals with the design and development of theft control system for automobile, which is being used to prevent/control the theft of a vehicle. The developed system makes use of an embedded system based on GSM/ GPS technology. The designed and....
-
Amplifier device that accepts a varying input signal and produces an output signal that varies in the same way as the input but has larger amplitude. The input signal may be a current, a voltage, a mechanical motion, or any other signal; the output signal is....
-
Using PIC16 simulator (Proteus) you can verify this digital clock code and change it according to your needs. Using three push buttons (As shown in figure below) you can adjust time as you desire. This code is written in C language using MPLAB with HI-TECH C....
-
There are various approaches to analog synthesizer building, luckily they don`t vary too much in terms of the applied building blocks. The main building blocks are: oscilator (VCO), filter(VCF), variable gain amplifier (VCA), envelope generator (EG), and....
-
Discusses the future direction of the Free Charge Controller project and proposes a new solar charge controller circuit....
-
The word "pentester" actually stands for penetration tester, people who tests security vulnerabi. Most of the high-end hotels around the world rely on keycard locks for the security of hotel rooms. However, these locks may not be so secure after all as a....
-
A safe home is a happy one, but many off-the-shelf surveillance cameras are too expensive or simply impractical for home use. That`s why designer Alberto Ricci Bitti created an automated and inexpensive surveillance camera that uses a flash card as recording....
-
There are two schematic diagrams showing a series and a parallel circuit that Tesla could have used. The tubes used were a common 70L7GT Half Wave Rectifer that believe it or notare still available today. I know all of you want to see this site but be....
-
-
-
-
This project came about due to my interest in a new form of radio transmission called DRM, which stands for "Digital Radio Mondiale" (see This is a new form of digital shortwave transmission. A few devices are available from Europe for decoding the digital....
-
The present circuit is intended to convert sinusoidal input signals to TTL output signals. It can handle inputs of more than 100 mV and is suitable for use at frequencies up to about 80 MHz. Transistor T1, configured in a common-emitter circuit, is biased by....
-
The mixer appearance two stereo phono inputs and two stereo line-level inputs and has one stereo bond channel. A microphone ascribe and a stereo capital achievement with adjustable accretion are additionally provided...
-
We can connect a output of pin 5 on the UM3511-IC to drive a transistor output to emit loud sound out to the speakers directly. For the variable resistor-VR1 act as determine a frequency of the oscillator circuit. When we created successfully. Should be....
-
A simple 12 volt inverter circuit. This 120V AC power source is built with a simple 120V:24V center-tapped control transformer and four additional component. This circuit outputs a clean 200-V pk-pk square wave at 60 Hz and can supply up to 20W. The circuit....
-
This circuit is useful to detect microwave (gigahertz signal) sources like microwave oven, satellite communication devices, Mobile phones etc. It gives audio visual indications when it detects the Microwaves in the Gigahertz band. Microwave is the form of EM....
-
-
-
-
-
A very simple and high quality TV transmitter circuit based on IC MC374 is shown in this article. MC1374 is an integrated TV modulator circuit that can be used in various TV transmitter applications. The MC1374 includes all necessary circuitries required for....
-
In this USB circuit using an IC as a modifier of digital voice data into analog so that it can be applied to a headphone, or again through the power amlplifier strengthened so that it can be heard through the speakers. IC used in this circuit using IC....
-
The circuit M8031 has a built-in RC oscillator and digital envelope circuits that make it to require few external components. The sound generated by the M8031 simulate an mechanical ding-dong sound. The M8031 operates from a low input voltage from 1. 3 to 3.....
-
-
This circuit can be used to escape from the nuisance of mobile phone rings when you are at home. This circuit will give a visual indication if placed near a mobile phone even if the ringer is deactivated. When a call is coming to the mobile phone, the....
-
The circuit shown here is of a simple 0 to 9 display that can be employed in a lot of applications. The circuit is based on asynchronous decade counter 7490(IC2), a 7 segment display (D1), and a seven segment decoder/driver IC 7446 (IC1). The seven segment....
-
This page contains circuit diagrams and code for a walking robot I made using Mark Tilden`s nervous network along with my own tinkerings like the reverser and brain circuits. Construction is a bit odd, chips with pins bent flat with wirebits and parts....
-
This is the circuit diagram of a very simple up down counter that can be used of a large number of applications. The circuit is based on the IC CD40110BE which is a CMOS decade up/down counter. For ICs are used here. Common cathode seven segment display is....
-
Used a coil of about 1mH for both sides. Since my chosen frequency was 125 KHz, my capacitor should be 1. 62nF according to the following equation; I picked 1n5 standard value. L1 is driven via a low-impedance 125 KHz oscillator, can be a sine or a square....
-
The hardware is just an Arduino board connected via USB to a laptop. The Arduino appears as a serial device to the computer. On the Arduino board, three LEDs (red, green, blue) are mounted directly to the Arduino board using a prototyping shield like this....
-
The notes for the fourth and final class are up on the Spooky Arduino class page. At the end of the class, Mark of Machine Project bestowed upon each of the students a merit badge. It was great. Click above for a larger view of the badge. Here`s a quick....
-
The Boarduino`s small footprint made me want to see how small of a device I could whip up in an hour from some fairly complex components. So I decided to see how small the combination of a Boarduino, a Wii Nunchuck, and a hobby servo motor could be. Here`s a....
-
BlinkMs are a lot of fun by themselves, but they`re also little network devices, each having its own address on an I2C network. Here`s where I think BlinkM can really shine since it makes controlling multiple RGB LEDs pretty easy. For Maker Faire, I wanted....
-
The minimal Arduino circuit is dead simple. It relies on the internal 8MHz oscillator (like the Lilypad Arduino). And like the Lilypad, it doesn`t include a USB-to-serial. You have to provide that with a FTDI USB-to-serial cable or with an old Arduino board.....
-
Most all work off of some flip-flop like principle. And while I could have suggested a true flip-flop chip, I thought it would be cooler if you could use a 555 timer chip (which contains a single flip-flop and a couple of comparators). After scouring my....
-
-
-
-
-
And here is the final part of the entry, starting with the schematic that I finally used. The core is the same as before. But now there is a linear voltage regulator for the controller. Also shown here is the serial interface and most importantly, the sensor....
-
Here is the schematic from the Eico 667 tube tester. It is very similar to the 666, except now there are a pair of extra levers, and a few test sockets are missing. But the meat and potatoes are identical. If you are planning to restore your 667 to peak....
-
-
If you want to do the ground loop elimination in audio path, you have to cut the galvanic connection but pass the whole audio range. The simplest and most common way to do the isolation is use audio transformer which is ment for audio use. Transformers for....
-
PWM is a highly efficient control scheme used to manipulate the flow of power through various electronic devices. I have seen it most commonly used in switched-mode power supplies, LED dimming circuits, and variable speed motor controls, but there are....
-
Below you can see the rest of the schematic integrated with the voltage regulator from my last post. As I explained previously, the PIC16F690 is the brains of my system. This PIC is a mid-range option for hobbyists and has much more functionality than I made....
-
The MicroCC uses the Touchstone Semiconductor TSM6025 voltage reference, a drop-in replacement for the MAX6025, with better than 15ppm/ºC stability. This is an....
-
The robot requires means of detecting an obstacle (or another robot) without making physical contact. This allows the robot to decide whether to avoid or to confront and investigate the obstacle depending on its programming. This is one solution and the....
-
This is a complete design circuit for a complete ultrasonic transceiver used in a variety of pulse/echo-ranging applications. Here`s the figure of the circuit; In this circuit, the LM1812 transmits a burst of oscillations with transducer X1. Then, using the....
-
Inverters U1a and U1b are connected in a simple RC oscillator circuit. The frequency is determined by the values of R1, C1 C2 and the internal characteristics of the integrated circuit. As long as the circuit is oscillating, a positive dc voltage is....