ib metal detector
#induction balance
#metal detection
#coil
#oscillator
#sensitivity control
#audio feedback
#handheld
#treasure hunting
#security
#educational
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Microcontroller Clocking a Transmitter?
The core of any transmitter is typically an oscillator circuit, and in simple transmitters, such as QRSS devices, a crystal is often used. Frequency adjustment is achieved by modifying the capacitance to ground on one of the crystal's legs. Simple...
Acousto-optic detector circuit to measure the crystal
The circuit consists of a capacitance three-point oscillator, an isolation level, a voltage doubler rectifier circuit, a stereo sound circuit, and a flash display circuit. It can detect the quality of a crystal; a good crystal will emit a "Didi"...
High drive oscillator-flasher
The driver in the package is configured as a Schmitt trigger oscillator (A), utilizing resistors R1 and R2 to create hysteresis. The inverting feedback timing components consist of resistor R3 and capacitor C, while resistor R4 serves as the pull-down...
coil coupled operation metal
The metal detector presented may represent a new category in its field. After some exposure, it has been recognized as such by those familiar with it. This device is based on a standard transformer coupled oscillator (TCO), which is why...
Metal detector circuit diagram 6
The metal detector circuit consists of several key components including the probe oscillator, reference oscillator, oscillation signal processor, mixing amplifier, and ammeter PA. The probe oscillator is made up of the oscillating tube VI, exploration coil L1, capacitors C1 to...
Electronic Locker Guard
Protect your locker or briefcase from theft using this pocket-sized gadget. It emits a loud police siren to attract attention. The circuit utilizes a single integrated circuit (IC).
This circuit is designed to provide a compact and effective security solution for...
Security alarm
This alarm features both open-loop and closed-loop detection systems along with an automatic alarm shutoff mechanism. It provides a 15-second delay for exit and entrance. Additionally, the alarm activation time can be adjusted from 1 to 15 minutes.
The alarm system...
Metallic pipe detector
This circuit employs a 15-kHz oscillator coil. When metal is removed from the energy field, the oscillator voltage is rectified and compared to a reference. A decrease in oscillator voltage activates comparator IC2, causing D4 (LED) to turn off.
L1 consists...
Metal detector 4
The metal detector circuit comprises a detection oscillator, a reference oscillator, a mixer, and a signal display, as illustrated in Figure 8-70. The detection oscillator circuit is made up of the time base oscillator IC1, inductor L1, potentiometer RP1, diode...