To get a good voltage swing, the value of R1 must be carefully chosen. If Rsensor = a when no light falls on it and Rsensor = b when light falls on it. The difference in the two potentials is: in presence of light and a very large resistance in absence of....

Color sensor. Colour sensor is an interesting project for hobbyists. The cir- cuit can sense eight colours, i.e. blue, green and red (primary colours); magenta, yellow...

This heat detector alarm electronic project is designed using the UM3561 sound generator circuit and some other common electronic parts. This heat detector circuit project uses a complementary pair comprising npn and pnp transistor to detect heat. When the....

This is a common control voltage in industrial and telecommunications equipment, so the relays are common in surplus equipment. Many will actuate equally well on AC or DC, which makes them an easy solution when the control voltage is switched mechancially,....

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A very simple proximity detector electronic project can be designed using this schematic circuit. This proximity detector electronic project use a tone decoder integrated circuit ( NE567 ) that will provides a signal with a frequency about 100Khz. When an....

This metal detector schematic circuit is based on a transistor radio as an detector .This metal detector is total different that other metal detectors, because this circuit doesn't have a speaker . With the radio tuned to a weak station you must adjust the....

This documentation was compiled as a result of a bee hive temperature monitoring project. Multiple DS18B20 temperature sensors were used to sense the temperature at various locations in the hive. An Arduino with a Nuelectronics sensor shield was used to log....

PLC input cards rarely supply power, it means that needs external power supply for the inputs and sensors. Below is an Input card and Ladder Logic diagram that shows how to connect an AC input card. The PLC inputs must convert a variety of logic levels tothe....

The ICL7106 Integrated circuit contain all the active circuitry for a 3 1/2 digit panel meter (DPM) in a single chip. It was designed to interface directly to a liquid crystal display (LCD). The potential difference across a silicon diode is dependent on its....

This ice warning and lights reminder electronic project circuit diagram will tell a driver if his lights should be on and will warn him if the outside temperature is nearing zero by lighting a LED and sounding a buzzer. Using the VR1 you can adjusts....

The extension port has an important role. Depending on the application several extension boards can be put in the socket. Extension boards for LCD and domestic (relays, temperatur and light sensors, opto decoupled inputs) are under development. Sheet 1 shows....

A 99 nissan sentra 1. 6 I recently put a new motor in and I have no power to my coil. I have changed all sensors back to my origanal. I do have ignition power and power to the crank sensor. It sounds like there is an open circuit from the ignition switch to....

This allows up to 8 analogue inputs (with a range from 0 to 5 volts) to produce selectable MIDI control output commands. The analogue inputs could be rotary or slider potentiometers which are connected to 0 to 5 volts. Also the inputs could be connected to....

Security system sensors such as motion detectors, reed switches, pressure mats, glass-break detectors, infra-red beams, and conductive film can be very handy for all sorts of things including home automation systems, interactive art installations and....

This lie detector circuit described eally give two readings: one for the difficult questions and one show subject general emotional state. As electrodes can be used two flexible wires, uninsulated wrapped around the fingers or wrist. Each change of....

A flame sensor (UV TRON) made by HAMAMATSU PHOTONICS, Japan, is an ultraviolet light detector. It has a narrow spectral sensitivity of 185 nm to 260 nm, being completely insensitive to visible and infrared light. Unlike semiconductor detectors, it does not....

The circuit for the Digital Tachometer/RPM Counter consists of only a few devices. Wire them up according to the following circuit diagram. The PIC I`m using is on a demonstration board, which means the clock, power and ground pins are already wired up so I....

Dew sensor. Dew (condensed moisture) ad- versely affects the normal per- formance of sensitive electronic devices. A low-cost circuit described here can be used to...

Neural networks are wide topic. But this small example demonstrates how to create basic neural sensor which takes resistive readings from multiply sensors and multiply it by wight factor and then sum the results. Results are compared to three level....

This is my student assignment for the class "Designing Microprocessor Based Instrumentation". The board demonstrates the use of 12-bit ADC, writing c program with digital filtering and interface the LED display. The reading provides 0. 1C sensitivity. The....

Color sensor is an interesting project for hobbyists. The circuit can sense eight colors, i. e. blue, green and red (primary colors); magenta, yellow and cyan (secondary colors); and black and white. The circuit is based on the fundamentals of optics and....

Build circuit on a 1" square circuit board. Position the variable resister so that it can be adjusted from one of the edges. Attach the CdS cells at the other end but not at the edge. Drill out two pins next to the center of one of the long sides of a Lego....

the rest of the pictures show the construction of the sub. It was made out of two C channels connected by an aluminum sheet. A skid was added to the bottom to allow the sub to skate over the bottom to gather quantitative video samples of the ecology. The....

By means of a Relay, employed to drive a water pump, this circuit provides automatic level control of a water reservoir or well. The shorter steel rod is the water high  sensor, whereas the longer is the water low  sensor. When the water level is below....

The AK4532 is a low-cost high-quality 16-Bit CODEC designed specifically for Internet Boxes, Network PCs, and to Interface with Audio Video controller ICs for standard PC applications. AKMs AK4532 serial Interface mode simplifies the design process on....

This video is a demonstration of reading an analog voltage, computing data, and controlling LEDs. I am using a Sharp GP2D12 Infrared (IR) sensor. More information about sharp distance sensors. The PDQ board connects to your host PC via a serial cable,....

A very simple proximity detector can be made using this electronic scheme. This electronic circuit reacts to the presence of a conductive object within a particular field. Circuit sensitivity can be adjusted with potentiometer P1 for the desired distance.....

The 1-Wire Net, or MicroLAN (by Maxim-Dallas), is a simple way to connect slow devices (such as sensors, relay drivers, switches, and so on) using simple components. These components contain the 1-Wire protocol handler, some type of interface to the external....

Magnetic switch is a circuit which can respond to magnetic fields that were around the sensor. The series of magnetic switches uses sensors in the form of limit switches that provide an additional metal plate that can respond to a magnet. Magnetic switch....

Freescale Semiconductor has unveiled at the Freescale Technology Forum in Tokyo what it says is the industry`s first tire pressure monitoring system (TPMS) containing a capacitive pressure sensor for ultra-low-power consumption and precise sensing. "By using....

This touch sensor switch can is designed using inverters (N1, N2)and some common electronic components. In standby state at the entrances of N1 there is a signal produced by oscillator N3/N4. At the touch sensor hand capacity forms a bridge to the ground for....