Ultrasonic Proximity Detector
The circuit in Figure 1a and Figure 1b are the schematics of an ultrasonic proximity detector. It has a maximum detection range of approximately 6 ft. When some...
Sensing Light
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Positioning Systems for Bed Profiling in Hydraulics Physical Models
Typical solutions for vertical movement of probe of bed profiling devices (guide wheels, dumpers, brakes, backlash and vibration suppressors not shown). Figure ...
Simple Light Detector with Sensitivity Control
The schematic diagram for the circuit is given in the picture above. Like its name suggests, a comparator compares two given voltages. The pair of 1K.....
Sensitive Tilt Trigger
Designed for any purpose that might need a very sensitive, any-direction, do-not-tilt switch. This instruction describes construction of: 1) My initia.....
SIMPLE WATER DETECTOR
Hi i am ajinkya this is my first Instructable -SIMPLE WATER DETECTOR For this project u will need the following parts: 1.IC 555 timer-1 2.Small size g.....
Monitoring water usage with Hall effect sensor and Arduino
This is a fairly simple schematic of the amplifier and filter. At the core of the circuit is an LM124 op-amp running in an inverting configuration. Th.....
Microcontroller measures heart rate through fingertip
The reflected IR signal detected by the photo diode is fed to a signal conditioning circuit that filters the unwanted signals and boost the desired pu.....
Honey Bee Counter Circuit
Real time clock turns OFF the counter at night for reduced power. When the bee crosses under the LED the light is reflected back to the sensor. (its a photo tra...
Geiger Counter
Publishing this one in a hurry, in case it is useful to our friends in Japan. This is a simple Geiger counter circuit. It does require some speciali.....
Temperature Conversion circuit
The Excelitas TPS 1T 0134 OAA060 thermopile sensor is a self-contained module with a built-in op amp. (We use the A2TPMI 334 OAA 60 designation in this document...
Cool small Circuits
The QT113 is a capacitance touch sensor. Unlike many touch sensors, it does not rely on AC line voltage to be present in the room. Instead, it detects the chang...
Long-Period Seismometer
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LM741 IC for Light Dark Sensor Circuit
Circuit bellow shows about LM741 IC for Light Dark Sensor Circuit diagram. This circuit have a many features, among others: 1 Watt LED spotlight, advantageous a...
Geiger Counters
Analog Geiger Counters are useful for detecting radioactivity and performing nuclear experiments. The GCK-01 model has numerous customizable options and comes a...
1490 Digital Compass
The first test circuit (see figure 5) is about the simplest circuit that can be designed around the device. The sensor is drawn in the schematic as if you are l...
AIR-FILTER SENSOR FOR HOME-USED AIR CONDITIONERS
This is a design project of an air-filter sensor to be used in home heating and cooling system. The project includes conceptual design, analysis, implementation...
Water Drops circuit
water drops. I`d always been drawn to time-lapse and macro photography, and it seems that the obiquitous water-drops are a common first step into this strange a...
Ultrasonic transmitter and receiver circuit with CA3140
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Ultrasonic Module Circuit
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