Repository-circuits
- Page 9-
The wireless light switch circuit described here requires no physical contact for operating the appliance. You just need to move your hand between the infrared LED (IR LED1) and the phototransistor (T1). The infrared rays transmitted by IR LED1 is detected.... -
This is a low power voltmeter circuit that can be used with alternative energy systems that run on 12 and 24 volt batteries. The voltmeter is an expanded scale type that indicates small voltage steps over the 10 to 16 volt range for 12 volt batteries and.... -
This power supply is designed for amateurs, and has been in operation for over 10 years. Its design is very simple and practically immune to RF. It brings together the individual pieces, is the most expensive part of 600VA toroidal transformer, which can be.... -
This project describes how to make a digital voltmeter with a PIC microcontroller. A character based on HD44780 LCD display is used to measure voltage. The PIC microcontroller used in this project is PIC16F688, which has 12 I / O pins of which 8 can be used.... -
A bidirectional H bridge DC motor control circuit is shown here. The circuit is based on the IC L298 from ST Microelectronics. L298 is a dual full bridge driver that has a wide operating voltage range and can handle load currents up to 3A. The IC also.... -
Here is the circuit diagram of an ultrasonic mosquito repeller. The circuit is based on the theory that insects like mosquito can be repelled by using sound frequencies in the ultrasonic (above 20KHz) range. The circuit is nothing but a PLL IC CMOS 4047.... -
User Agrement & Disclaimer Disclaimer All files are found using legitimate search engine techniques. This site does not and will not condone hacking into sites to create the links it list. We will and do assume that all links found on the search engines we.... -
This circuit, a simple mixer circuit. It can mix two signal channels and one channel is output. Using a codec circuit, Convert stereo audio to mono audio time. It can increase the number of channels too. By adding a VR1, R1 and C1 to the amount needed. Then.... -
In my previous post of capacitive touch switch, it gives the o/p as long as you touch it. Means it was only drive the load when you touch it, and when you remove your hand/finger then it was not able to drive the load. Tough that touch switch circuit can be.... -
This circuit provides sine and square wave at frequency of below 20Hz up to above 20KHz. The benefit of this circuit diagram is that you can adjust the output frequency by varry the variable resistor of R6. .. -
The circuit uses a dual operational amplifier IC, the 1458, which is a single IC package that houses two individual op-amps. In this circuit, the first op-amp is used as a voltage follower whose output is used to charge the capacitor C1 through D1. As such,.... -
This is the figure simple telephone ring tone generator circuit designed using only a few components. It produces simulated telephone ring tone and needs only DC voltage (4. 5V DC to 12V DC). One may use this circuit in ordinary intercom or phone-type.... -
User Agrement & Disclaimer Disclaimer All files are found using legitimate search engine techniques. This site does not and will not condone hacking into sites to create the links it list. We will and do assume that all links found on the search engines we.... -
Until Willow Garage was acquired, I was working there as a Web Robotics Engineer. Really, it`s just a title I gave myself for a full-stack engineer who deals with the issues of real-time, distributed robot control. I`m on GitHub, of course. My most popular.... -
This is a quick DIY electronics project I set for myself so I could brush up on my circuit design and some building techniques. I bought a couple copper lanterns off ebay and fitted them with a circuit similar to the outdoor solar lights you can buy for your.... -
Second, I have found that when the receiver was centered in the brightest spot (middle) of the reflected laser beam the circuit worked poorly compared to when the receiver was placed off-centered. This probably indicated that the circuit was saturated when.... -
For an introduction to our liquid-level inclinometer, and a description of our apparatus and early work on the instrument, see Inclinometer Performance. Here we record our day-to-day work on the instrument from February 2008 onwards. We provide some section.... -
The LWDAQ Driver (A2037) is a Long-Wire Data Acquisition ( LWDAQ ) Driver. You will find an introduction to the LWDAQ in the LWDAQ User Manual. The A2037 provides eight LWDAQ driver sockets, each of which may be connected to a LWDAQ device or a LWDAQ.... -
The A2045 uses the same circuit as the A2052. Instead of mounting with three snap-top standoffs, as does the larger A2052 board, the more compact A2045 mounts by gluing it onto a rectangular flange that fits around the bottom side of the board. When glued.... -
The Proximity Camera Head (A2047) is a Long-Wire Data Acquisition ( LWDAQ ) Device that reads out a TC255P image sensor. It is a radiation-tolerant descendent of the Inplane Sensor Head ( A2036 ). We use the A2036 and A2033 most often with the LWDAQ.... -
The Quad Laser Head ( A2050 ) is a LWDAQ device that drives four laser diodes. The A2050 was designed by Brandeis University for general use with BCAMs. The Weizmann Institute took the A2050 schematic and created their own version of the A2050 for use with.... -
The Resistive Sensor Head (A2053) is a Long-Wire Data Acquisition ( LWDAQ ) Device that measures the resistance of up to eleven resistive sensors. These sensors could be 1000- © RTDs (resistance-temperature devices), 100- © RTDs, 120- © strain guages, or any.... -
The A2060H is an H-Bridge extension for the Programmable Logic Head ( A2060 ). With the help of an external power supply to provide the motor current, the A2060H provides variable-speed, bi-directional drive to DC motors. The motors can operate at anywhere.... -
The Laser Head (A2074) provides drive circuits for one or two laser diodes. The drive circuits provide fast switching from off to full power, while at the same time providing complete protection of the laser diode from over-drive. We turn on the lasers by.... -
The Camera Head (A2075) is a LWDAQ Device that controls and reads out a single ICX424 image sensor. The circuit provides a socket into which we can solder the sixteen-pin sensor directly. It provides a twelve-way flex socket to which an auxiliary board.... -
The ICX424 Minimal Head (A2075) holds a single ICX424 image sensor and an optional pair of illumination LEDs. Power and drive signals enter the circuit board through a twelve-way flex connector. Three capacitors provide local de-coupling of the supplies. The.... -
The ADC Tester (A2100) is a LWDAQ device that records the output and power consumption of two ADC s. Its original purpose was comparative testing of two ADCs at different temperatures, but it turned out that the A2100 makes a good dual-channel eighteen-bit.... -
I used the first circuit to generate the greyscale video, and mixed in the composite sync obtained from the second circuit, I had tried just mixing in the Hsync and Vsync as per the first circuit but couldn`t get this to sync the TV. The adapter itself is no.... -
As you see in the circuit above the four pins "Controller pin 1", 2, 3 and 4 will control the motion and direction of the stepper motor according to the step sequece programmed in the controller. As already discussed in case of L293D, Here in this circuit.... -
As we know many kinds of insects have their tendency to hear ultrasonic sound(which cause them irritation), this project is very useful to swept away those insects like mosquito cockroach etc. .. -
Learn to use the LCD display on your pic 18 explorer board with the spi library. The spi library will be used to easily display characters on the LCD. You will also learn how io expanders work... -
I know the general rule of world that reading makes man ready, writing makes man everyday but practice makes man perfect. Only theoretical knowledge is not enough for an E. C (Electronics and communication engineering)student. A project is one of the....
New Circuits
-
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
This circuit will supply up to about 20ma at 12 volts. It uses capacitive reactance instead of...
This filter is used to reject or block a frequency or band of frequencies. These filters are...
Hall-effect switches have several advantages over mechanically and optically coupled switches.
The ear protector is actually a peak audio-detector/shutdown circuit that disables the amplifier...
Cal-(IT)2 is developing several generations of general broad application radio/networking test...
The Universal Serial Bus (USB) interface has become extremely popular, due to its simplicity for...
For longest life, we recommend you run them at 20-25 milliamps (ma). HOWEVER, in our LED...
This circuit is half dozen Band Graphic Equaliser, you can modify sound in low, mid and high that...
This project uses a widely available IRF510 MOSFET. This N-Channel enhancement mode silicon gate...
Using Nokia 2300 for my project and the original earphones that came with it. They work properly...
The detector is intended for the recognition of obstructions at distances of a few millimeters to...
35W resistive and capacitive half-wave phase-shift trigger doer control circuit Automatic or...
FIG VDI, VD2, Rl and Cl form resistance voltage half-wave rectifier circuit, the output DC...