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Build an Ultrasonic Proximity Detector - Detect objects through ultrasonic sound waves. __ Contact Jameco Electronics Build this add on Capacitance Meter - This simple add-on capacitance meter has been specially designed to help you identify capacitors from 1p to 10u. There has always been a problem identifying capacitors, due. __ Designed by Collin Mitchell
Capacitance meter - Every home constructor should own at least two pieces of test equipment: a digital (or analog) multimeter and a simple frequency counter. Most digital multimeters can measure capacitance, but the capacitance range is rather limited __ Designed by Aren van Waarde
Capacitance meter - Every home constructor should own at least two pieces of test equipment: a digital (or analog) multimeter and a simple frequency counter. Most digital multimeters can measure capacitance, but the capacitance range is rather limited (in my case, from about 10pF to maximally 10 µF). it is not possible to check the value of large capacitors with such a meter, e.g. bipolar electrolytics in a cross-over filter, or reservoir caps in a power supply. in my attic, I have not only a digital multimeter but also a cheap frequency counter (0...10MHz). So I decided to build a simple tool which would allow me to check the value of large capacitors, using the frequency counter. __ Designed by Aren van Waarde
Capacitance Meter - This project is more complex than the others described earlier. However, when finished, you will have an instrument capable of measuring all but the largest capacitors used in radio circuits. Unlike variable resistors, most variable capacitors are not marked with their values. As well, the markings of capacitors from salvaged equipment often rub off __ Contact IQ Technologies
Capacitance Meter - Operates in conjunction with a voltmeter; 1pF to 22µF in six Ranges - 9V Battery supply __ Contact Flavio Dellepiane, fladello @ tin.it
Capacitance meter (Colin Mitchell) - This simple add-on capacitance meter has been specially designed to help you identify capacitors from 1p to 10u. __ Contact Collin Mitchell
Capacitance Meter (Elm-chan) - This is a simple capacitance meter which can measure capacitance value easy. There are some measurement methods for capacitance, at one time the capacitance was measured with a impedance bridge or a dip meter. __ Designed by The Electronic Lives Manufacturing-presented Chan
Capacitance-Type Liquid Level Monitor - This circuit was originally designed to monitor the level of liquid natural gas in a tank but it can be used to also measure almost any liquid. Two custom insulated metal tubes form a capacitor plate. The capacitance between the two tubes increases as the level of the liquid rises. . . Circuit by David A. Johnson P.E.-June, 2000
Capacitive Sensor - Easily adjustable, high sensitivity circuit; Minimum parts counting __ Contact Flavio Dellepiane, fladello @ tin.it
Capacitive Sensor likes ParasitICs - 09/24/98 EDN Design Ideas: NOTE: Contains several designs, scroll to find this one. Stray capacitance is a common problem with capacitive sensors. The capacitance changes within the measurement range are normally much smaller than the strays; the result is a loss of sensitivity. Various methods are available to increase the relative sensitivity (Deltaf/f0] frequency subtraction, Design by Boris Khaykin, Candid Logic Inc, Madison Heights, MI
Capacitive Touch Switch Uses CPLD - 05/29/08 EDN Design Ideas: Using an Altera MAX iiZ CPLD, you can implement a touch-switch decoder with no external components Design by Rafael Camarota, Altera, San Jose, CA
Digital Capacitance Meter - This is a simple capacitance meter which can measure capacitance value easy. There are some measurement methods for capacitance, at one time the capacitance was measured with a impedance bridge or a dip meter. __ Designed by The Electronic Lives Manufacturing-presented Chan
Dual comparators stabilize proximity Detector - 02/16/98 EDN Design Ideas: (File contains several circuits, scroll to find this one) Design by Arthur Harrison, US Army Research Laboratory, Adelphi, MD, and Joseph Stern, Maxim Integrated Products, Sunnyvale, CA
Femto Capacitance Meter - This meter measures into the low femtofarad area. Measuring in the femto area allows the smallest capacitors to be measured with precision. Such capacitors are commonly used to compensate for input and stray capacitance in amplifiers. __
How to Recover a Pulse Signal with a Large Capacitance Load - EDN Design Ideas: 06/22/12 Load capacitance has the potential to alter a pulse’s shape, which should be avoided for pulse-signal transmission. Since the output signal follows with an input signal, a differential circuit can be used to detect the edge of the input signal. Design by Chenan Tong
Infrared beam barrier / proximity Detector - This circuit can be used as an infrared beam barrier as well as a proximity detector. The circuit uses the very popular Sharp IR module (Vishay module can also be used). The pin nos. shown in the circuit are for the Sharp & Vishay modules. For other modules please refer to their respective datasheets. The receiver consists of a 555 timer IC working as an oscillator at __ Contact http://www.tronicszone.com
Infrared beam barrier/ proximity sensor - his circuit can be used as an infrared beam barrier as well as a proximity detector. The circuit uses the very popular Sharp IR module. The pin nos. shown in the circuit are for the Sharp module only. For other modules please refer to their respective datasheets __ Designed by Radioland.nt.au
Infra-red Level Detector - Useful for liquids level detection and proximity devices; Up to 50 cm. range, optional relay operation __ Contact Flavio Dellepiane, fladello @ tin.it
Infrared Motion Detector - Pyroelectric infrared sensor and associated circuits detect infrared radiation from human or animal body. General purpose motion detector with normally open relay output.16 pages. __ Golab.com
IR Proximity Sensor - It is the same principle in ALL infra-Red proximity sensors. The basic idea is to send infra red light through iR-LEDs, which is then reflected by any object in front of the sensor. Then all you have to do is to pick-up the reflected IR light. For detecting the reflected IR light, we are going to use a very original technique: we are going to use another iR-LED, to detect the IR light that was emitted from another LED of the exact same type! This is an electrical property of Light Emitting Diodes (LEDs) which is the fact that a LED Produce a voltage difference across its leads when it is subjected to light. As if it was a photo-cell, but with much lower output current. __
Low Value Capacitance Meter - This circuit was originally designed to measure the volume of fluid inside a medical syringe. As designed, it produces a zero to 5 volt output, corresponding to a capacitance change of about 10 picofarads. . . Circuit by Dave Johnson P.E.-December, 2004 |
