Repository-circuits
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The voltage measurement is very general in electron technology at present, accuracy requirement and functional requirement for the instrument are higher and higher, especially under the situation that the signal power to be measured is with maximal phase.... -
In electron technology, the triode uses a kind of extremely general components and parts, the parameter of the triode and a lot of electricity parametric measurement schemes, measuring results have a very close relation, so, in the electronic design, the.... -
The cardinal principle originally designed is, the temperature value that the one-chip computer gathers the temperature sensor real time and place is compared with thermostatical values presumed and dealt with. Thus control and keep the temperature value of.... -
With the high-speed development of social economy, the human demand for electric energy is larger and larger. Under non-renewable, situations in short day by day of energy such as the fossil energy, etc. , the increasingly many country realizes the power.... -
Have already gone through 3 stages till a few days ago in the developing of street lamp control device of solar energy: First generation function simple and crude, turn on or off light, control, need, connect light sensitive in conformity with device,.... -
When the input voltage is 198- 242V, the mean value of the load current is 0. 5- 1A, the mean value of the output voltage should keep in 15V, the error is smaller than 5% : 1 When the input voltage is 198- 242V, the mean value of the load current is 0. 5-.... -
We have adopted the one-chip computer, utilize the advantage of the one-chip computer to design this survey meter. This survey meter can read out the resistance quantity measured from LCD display screen directly, the measurement limit is 10 2. 9999k, can.... -
The motor vehicle is the automotive of no emission at present, as the means of transportation of green, will bring the huge change to human society in the 21st century. And the direct-flow brushless electric machine relies on its fine characteristic to.... -
The intersection of industry and data collecting system, hydrometeorologicalcontrol system, robot control system, digital image transmission system, etc. , it is due to the electron transport of the data information. We can say, the data information.... -
This one will report about and introduce two very important resources within the one-chip computer -Timing / counter and interrupt system. Say through this, readers can know the operating principle of the timer and interrupt system of the one-chip computer..... -
Because small, precision high, high sensitivity and definition higher advantage with low price of having size of SAW sensor, so has produced SAW gas sensor composed of surface acoustic wave device, sensitive membrane and relevant detection circuit. The.... -
The output current range of the parameter current regulator is little, the current regulator is not tall in precision; It is small to connect the feedback adjustment type output current of the current stabilized power source in series, efficiency is lower;.... -
ZSSC1856 of ZMDI Company is the double-channel ADC of integrating embedded MCU, made up of two chips, PQFN32 5x5mm capsulates. Basic chip SBC of the system Having included the high tension circuit, LIN transceiver and including the peripheral hardware, 18.... -
Most small internal-combustion engines commonly used in the model-building world use glow plugs for starting. Unfortunately, glow plugs have an operating voltage of 1. 5 V, while fuel pumps, starter motors, chargers and the like generally run on 12 V. This.... -
This article is about a simple 5 channel radio remote control circuit based on ICs TX-2B and RX-2B from Silan Semiconductors. TX-2B / RX-2B is a remote encoder decoder pair that can be used for remote control applications. TX-2B / RX-2B has five channels,.... -
This electronic cricket is a present for Kids. This simple battery powered circuit can be used to play Cricket Match with your friends. Each LED in the circuit indicates various status of the cricket match like Sixer, Run out, Catch etc. The Circuit uses two.... -
The circuit below illustrates how to build your own daq_lite - also shown is a photo of a completed PCB board. Note that the 80mA fuse shown in the photo and the protection diode close to it are recommended but not necessary. Once you`ve built the circuit.... -
A simple oscillator circuit that varies the duty cycle over a wide range without affecting the frequency. It is a variation of the simple 555 astable oscillator. Initially, I told a reader that there was no standard 555 circuit that could do this, but then.... -
This circuit turns-off an amplifier or any other device when a low level audio signal fed to its input is absent for 15 minutes at least. Pushing P1 the device is switched-on feeding any appliance connected to SK1. Input audio signal is boosted and squared.... -
All miniature electronic devices operate off batteries. Some of them need higher than the standard battery voltages to operate efficiently. If the battery of that specific voltage is unavailable, we are forced to connect additional cells in series to step up.... -
Valves are enjoying increasing popularity in audio systems. With the European E` series of valves, such as the ECC83 (12AX7) and EL84 (6BQ5), the filament voltage is 6. 3 V. Depending on how the circuit is wired, the ECC 81 83 series of twin triodes can also.... -
Inexpensive miniature transformers normally provide one or two secondary voltages, which is sufficient for generating a set of positive and negative supply voltages, such as are needed for operational amplifier circuits. But what can you do if you need an.... -
This circuit in below uses two quad voltage comparator using IC LM339 to illuminate a series of 8 LEDs indicating volume level. Each of the 8 comparators is biased at increasing voltages set by the voltage divider so that the lower right LED comes on first.... -
The circuit can be operated from 4. 5V to 12V DC or direct from the brake point of the motor-bike, Resistor R7 should be replaced with 1-ohm. 1/2W in case of an 8-ohm speaker. T5 is a driver transistor. C3 polarity can be reversed for a sudden off of the....
New Circuits
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This project fits more for custom made battery casing that can have more space to hide things inside. This switch with few alterations can be used for any other project as well but is designed based on e-bike needs! This project use a clever functionality of.... -
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is.... -
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to.... -
Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This.... -
The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the.... -
The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound,.... -
In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the.... -
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power.... -
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower.....
Popular Circuits
Pressing the pushbutton of the transmitter, a sound and/or light alert is activated in the...
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