ring detector
#ring detection
#proximity sensor
#inductive sensor
#metal detection
#signal processing
#detection circuit
#electronic sensing
#non-contact sensor
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Interpolating Scanner Circuit
This design is for an interpolating scanner, a circuit featuring multiple signal inputs, a control voltage input, and a signal output. The output selectively transitions between inputs, smoothly fading from one to the next as the control voltage increases. A...
Presence detector proximity sensor circuit
This circuit responds to the presence of any conductive object, including humans. It does not detect object movement but can function as a proximity sensor.
The circuit operates on the principle of capacitive sensing, utilizing a capacitor to detect changes in...
Metal Detector Circuit
The device being constructed will serve as a metal detector, capable of locating metal objects such as coins, nails, and keys, including car keys that may be misplaced. It can also detect gold, although it may not possess industrial strength....
Doorknob Proximity Alarm for wooden door
Reverse engineered circuit diagram of a popular retail doorknob alarm. It contains a small transmitter and the doorknob acts as an antenna so it will not work on a metal door. When a person comes close to the doorknob this...
Doorknob Proximity Alarm for wooden door
Reverse engineered circuit diagram of a popular retail doorknob alarm. It contains a small transmitter and the doorknob acts as an antenna so it will not work on a metal door. When a person comes close to the doorknob this...
Metal detector 2
The metal detector described in the example can detect metal objects made of highly permeable magnetic substances. The circuit operates based on several components: a power circuit, a sine wave oscillator, a PLL (phase-locked loop) circuit, and a hybrid amplification...
proximity alarm circuit
Inverters U1a and U1b are connected in a simple RC oscillator circuit. The frequency is determined by the values of R1, C1, C2, and the internal characteristics of the integrated circuit. As long as the circuit is oscillating, a positive...
Proximity-sensor
The SillOO series circuit input is connected to a capacitive field sensor, potentially utilizing a double-sided circuit board. Any induced voltage change on the plate is directed to the input of the peak detector section of the operational amplifier circuit....
Proximity sensor - Page 2
The circuit operates but exhibits instability, particularly with temperature variations. For example, upon powering it on and tuning it, switching it off and on again affects its performance. The control voltage (CV) output is essential for the theremin/controller circuit. This...