Circuits & Schematics: detector - 5
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Search results: 148 Output: 41-50
- .. emitters, but they can also function as photosensors. A single LED can even function as both a light emitter and a light detector in the same circuit. The basic idea is to pulse the LED, using the on-time to light it and the off-time ...01-04-2008
- .. LED lights up, order something else. The circuit is similar to the unbalanced version of the Cheap but Sensitive Radiation Detector above and only requires two darlington transistors, an LED, and one or two resistors along with a ...29-11-2007
- .. produces. You apply both pulses to IC3, a 7400 or equivalent NAND gate, which together with IC1 forms a long-pulse detector. Use the equation in IC1's data sheet to select values for C1 and R1 that yield a value of approximately ...18-12-2007
- .. it again so I made a solenoid operated 3 way valve to turn the suction on and off quickly. The top circuit board is an opto detector which looked at tabs on the right hand rail to know where the shelves were. The board below it is a ...04-03-2008
- .. easily detect both audio and RF signals up to frequencies of around 100 kHz. Note, however that this circuit is NOT a metal detector, but will detect metal wiring if it conducting ac current. Frequency response is from 50 Hz to about 100 ...30-10-2007
- .. below the battery voltage. The MAX471 current-sense amplifier monitors the charging current and feeds back to a threshold detector so that below a designed threshold the flyback converter can switch to a lower charging voltage for ...25-03-2008
- .. in the range 1.5-3 cm. If you are needing a simpler circuit of this kind driving a LED or a relay, click Infra-red Level Detector.03-08-2009
- .. circuit is a 3 pin, tuned radio frequency circuit, and incorporates several RF stages, automatic gain control and an AM detector. It is easily overloaded and the operating voltage of th IC is somewhat critical to achieve good results. ...14-12-2009
- .. you can use a simple copper plate of 1cm×1cm or even the end of the lead wire. Touch plate is coupled to the touch detector through 820pF, 2kV capacitors C1, C2, and C3 connected in series. Touch dimmer switch circuit diagram ...21-10-2009
- .. each other. b) Q2 emitter-follower transistor quickly charges C8 which discharges slower into R13 and is used as a peak detector. c) Q3 transistor is the automatic gain control. It is also a peak detector but has slower charge and ...26-10-2009
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