Sensor Circuits
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This is my first autonomous robot. I built it to explore the interfacing of various sensors to a PICAXE processor. His mission is to search for a magn.... -
A 2002 blazer and I ran the codes on it and it came up po 155 and po 756 which a 02 sensor heater circuit malfunction and ashift solenoid b ckt performance of stuck off. What is that and what will it cause. The blazer has power when it first starts then when.... -
Some ultrasonic range finders for my project. But most of the commercial sensors like Parallax`s PING sensor and other similar products are quite expensive, especially if multiple units are needed. So I thought why not building it myself The theory behind.... -
A wireless temperature sensor so that temperature measurements can be made anywhere within the range of the transmitter and the receiver. There are many ways to achieve this. One of the simplest ways is to use a voltage to frequency conversion chip along.... -
The hall effect sensor we will use in this circuit is an A1302 hall effect sensor manufactured by Allegro. This IC can detect magnetic fields. We will then connect this IC to an arduino, so that we the arduino can read the voltage output by the A1302 and we.... -
In this project we`re going to use use two wires, in this project, we use one red and the other blue, which serve as the touch sensor wires. When a person touches both wires, the circuit is then closed and current runs through the circuit and lights the LED..... -
Many people place motion detectors in their backyards or even in their houses so that when they walk through that area, the lights will automatically turn on. Thus, motion sensor lights are very popular and being increased in use. Businesses use them all the.... -
The IC we will use to measure the temperature is the TMP36 IC. We will integrate this with the arduino to measure the temperature. The arduino will then read this measured value from the TMP36 and translate into degrees fahrenheit which we will be able to.... -
This acoustic sensor was originally developed for an industrial application (monitoring a siren), but will also find many domestic applications. Note that the sensor is designed with safety of operation as the top priority: this means that if it fails then.... -
For several years now, a rear fog lamp has been mandatory for trailers and caravans in order to improve visibility under foggy conditions. When this fog lamp is switched on, the fog lamp of the pulling vehicle must be switched of to avoid irritating.... -
This circuit uses a thin piezoelectric sensor to sense the vibrations generated by knocking on a surface; eg, a door or table. Basically, it amplifies and processes the signal from the sensor and sounds an alarm for a preset period. In operation, the.... -
This "Super Light Sensor" responds to minute fluctuations in light level, auto-adjusting over the range from about 200 lux up to 60, 000 lux (ie, from a modestly lit room to direct sunlight). It has lots of potential uses - eg, detecting a car entering a.... -
This circuit shows how to use an ordinary LED as a light sensor. It makes use of the photovoltaic voltage developed across the LED when it is exposed to light. LEDs are cheaper than photodiodes and come with a built-in filter, which is useful when the.... -
If you don`t have an audio detector already constructed, you can use a nice set of audio headphones (closed-cup style, that completely covers your ears) and a 120V/6V step-down transformer to build a sensitive audio detector without volume control or.... -
A circuit is described that transmits temperature data over an IR link. This allows isolation of the temperature sensor.... -
This thing is a very nifty capacitive sensor. For you europeans, this little gem is used in north america mostly for detecting wooden beams behind drywall or plaster. I`ll take one of these over the new design any day, because these ones don`t error out.... -
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,.... -
Interfacing the LM335A temperature sensor to A/D converters, measuring temperature with LM35 LM335A sensor and the 9S12 HCS12 MCU, calibrated and uncalibrated temperature errors of IC temperature sensors.... -
The LDR is a variable resistor whose resistance decreases with increase in light intensity. When the light falling on an LDR has normal intensity, its Resistance is large enough and the voltage across R is insufficient to trigger the SCR. However, when light.... -
For this special Halloween project we built a spooky candy bowl that lights up when an unsuspecting trick-or-treater reaches in. While devices like these do exist, many of them use complicated proximity sensors to spring their trap. Here at NerdKits we enjoy....
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We always like to use Halloween as a chance to show off neat homemade electronics to the general public. In this special Halloween video tutorial, we have recreated the idea behind a musical instrument called the theremin, and built one into a Halloween.... -
By the ultrasonic sensor, control and display (or buzzer) and local composition, it can tell the driver his around obstacles by voice or a more intuitive display case. Relieve the driver stop, reverse and start to visit around the vehicle caused by problems,.... -
This section gives step-by-step instructions along with photos to the construction of IR Proximity Switch. Because this is a very simple circuit, only a schematic for the sensor is shown here: (For the PDF format click here. ) This tutorial`s objective was.... -
The plan is to have some plant sensing working for a groworld installation we are doing at Camp Pixelache so I`ve made the circuitry a little more durable with a bit of soldering: Here`s the circuit diagram the values of components are influenced by what I.... -
A distance sensor would be a nice addition to Mindstorms robots, but ultrasonic ones were bulky and power hungry, and simple infrared method like the one I used in my radar car detects obstacles but don`t give true distance measurement. The solution came.... -
Lego rotation sensor is a nice little device that enables RCX to measure rotation of an axle with good resolution: 16 steps per turn. Unfortunately it is plagued with a problem: at low rotation speed value read seems to jump randomly from 1 or two units. So.... -
The A1301 and A1302 are continuous-time, ratiometric, linear Hall-effect sensor ICs. They are optimized to accurately provide a voltage output that is proportional to an applied magnetic field. These devices have a quiescent output voltage that is 50% of the.... -
The schematic for this project is fairly large and you can see the complete schematic below. To explain what is happening here I will split it into two sections which I will call the analog and digital sections. The schemtic below (click to enlarge it) is.... -
The schematic for this project has been kept super simple with very few parts keeping the total cost very low and assembly time low. The main parts in the schematic are the PIC 18F452, Tilt Sensor and LED Bar. The power regulation circuit is in the lower.... -
The Proximity Sensor circuit can be seen below. Three red boxes show the additions to the circuit that we already built in Part 2: Motor Control. The new parts used and seen in the schematic below are the GP2Y0A21YK IR Sensor, Headphone Speaker and some....
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.....
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