Sensor
circuits  related subject Sensors |
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Alarms &
Security Circuits Gate Alarm Circuit, Zone Alarm system, Miniature Loop
Alarm, Modular Burglar Alarm, Water Activated Alarm, Buzzer,Radio Wave Alarm,
Enhanced Alarm Keypad, 4 Digit Keypad, Motorcycle Alarm, Water Level Alarm,
Single Zone Alarm, CMOS Single Zone Alarm, Mini Alarms, Car Alarm and
Immobilizer, Hijack Alarm, Snore Alarm, Motorcyle Alarm, Automatic Intruder
Alarm, Earthquake Detector, Shed / Garage Alarm Circuit, An SCR Based Burglar
Alarm, A Transistor Based Alarm, One Time Only Alarm, Battery Powered One Time
Alarm Only, CMOS 4060 Alarm,Audio Security Monitor, 6 Zone Alarm with 7 Segment
Display |
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Alarm and Security
Circuits An Expandable Multi-Zone Modular Burglar Alarm, A One-Time-Only
Burglar Alarm, SCR based burglar alarm circuit, Single Zone Burglar Alarm
Circuits, Battery-Powered Alarm Circuits, Alarm Control Keypads, Keypad-Operated
Door-Lock Release, Automobile Alarm Circuits, Motorcycle Alarm Circuits,
down? |
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Anti-Theft Alarm for Bikes
pdf file |
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Beat Balance
Metal Detector Instead of using a search and a reference oscillator as with
BFO, or Tx and Rx coils as with IB, it uses two transmitters or search
oscillators with IB-style coil overlap. The frequencies of the two oscillators
are then mixed in similar fashion to BFO, to produce an audible heterodyne,
metal detector |
| Capacitive sensor
capacitive sensor, useful as tip-control |
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Capacitive sensor
Spread Spectrum Capacitive Sensor circuit |
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Coil Coupled
Operation Metal Detector A Coil Coupled Operation Metal Detector made from
readily obtainable components and using an ordinary medium receiver as a
detector |
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Compass Sensor
This electronic device is a high sensitive magnetic field sensor,
magnetoresistive effect of thin-film permalloy |
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Electromagnetic
Field Detector This circuit is sensitive to low frequency electromagnetic
radiation and will detect for example hidden wiring or the field that
encompasses a transformer |
| Electromagnetic
field probe with meter to locate stray electromagnetic (EM) fields. It will easily detect both audio and RF signals up to frequencies of around
100kHz |
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Fastest Finger First Indicator
pdf file |
| Fridge door alarm
beeps if you leave open the door over 20 seconds 3V battery operation, simple circuitry |
| Humidity
sensor 2322 691 90001 |
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Inclinometer
an inclinometer (tilt-measuring circuit) whose sensor (SN1) is filled with
liquid electrolyte. Acting as a potentiometer, the inclinometer produces a
voltage proportional to tilt on its center electrode, ... |
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Invisible Broken Wire Detector Invisible Broken Wire Detector,
pdf file |
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Ionising Smoke Detector
pdf file |
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Little Door Guard if some intruder tries to open the door of your house,
this circuit sounds an alarm to alert you against the attempted intrusion,
pdf file |
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Mercury switch filter |
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Metal detector
Here is the metal detector with a range of a few inches. This is useful for
detecting nails or screws in walls and floors, or for locating buried mains
cable. The heart of the circuit is the
CS209A
datasheet
(proximity detector) made by ON Semiconductor, pdf file |
| Metal detector
The circuit is an oscillator and the way it keeps oscillating is due to positive
feedback. This is the case with all oscillators and the component that provides
the feedback is the 1n capacitor between the collector and emitter of the
transistor. It may seem unusual that the transistor can be turned on via the
emitter to keep it oscillating, but in fact it does not matter if the emitter or
base receives a signal as the important factor is THE VOLTAGE DIFFERENCE between
these two terminals |
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Metal detector |
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Metal detector
A single chip metal detecor with a range of a few inches. This is useful for
decting nails or screws in walls and floors, or for locating buried mains cable,
CS209A, CS209AYN
The CS209A is a bipolar monolithic integrated circuit for use in metal
detection/proximity sensing applications,
pdf file |
| Motor
control sensor feedback circuits sensors are used to sense the current,
position, speed and direction of the rotating motor, pdf file |
| Oxygen
sensors oxygen sensors |
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Precision Digital Altimeter Pressure Sensor circuit,
Educypedia |
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Pressure Sensor |
| RF/capacitance
level instrumentation capacitance level detectors are also referred to as radio frequency (RF) or admittance
level sensors. They operate in the low MHz radio frequency range, measuring admittance of an alternating current (ac) circuit that varies with level |
| Ridiculously
sensitive charge detector |
| Touch plate touch plate circuit with transistors,
schematics |
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Use your printer port as a high-current ammeter
with a few inexpensive components and INT1Ch, you can turn the printer port of your PC into a high-current ammeter. This design's goal is to make remote
high-current measurements, but you can use this technique to remotely measure any other similar analog electrical quantity, such as voltage and charge,
Educypedia |
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Vibration Detector The detector will sense vibration caused by activities
like drilling and switch on the connected load (bulb, piezobuzzer, etc) to alert you, Educypedia, pdf file |
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Voltage-Based Controller For Switches a simple circuit for controlling four
switches from a distance through just a pair of wires, pdf file |
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Wheel encoders |
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Zone Alarm
System This is a complete alarm system with 5 independent zones suitable for
a small office or home environment. It uses just 3 CMOS IC's and features a
timed entry / exit zone, 4 immediate zones and a panic button |
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Horizontaal |
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Last updated on:
2011-01-15
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