The proposed simple crystal tester circuit can be used for accurately testing the operating frequency of any standard crystal, quickly. The figure below shows a crystal checker circuit schematic. In […]
Diode Matching Circuit (Pairing Circuit)
In one of our projects we required several matched silicon diodes for accomplishing a perfectly balanced modulation design. We could easily construct it through a 9 V battery for the […]
Audio Signal Conditioner Circuit
This discussed audio signal conditioner circuit is great for sweeping weak and noisy audio or Morse-code signals. The circuit can also be utilized to clean up digital audio signals which […]
Inductive Non Contact Current Sensor Circuit
This non contact inductive current sensor circuit is designed to detect an alternating current (AC) flow within any circuit and its cables, without undergoing any direct contact with the conductor, […]
Current Detector Circuit on PCB Tracks
This High-Gain Current Sensor circuit can be deployed to detect the availability of low-level current flowing though a PCB’s copper lines or traces. Two straight-pin probes are utilized to form […]
Simple Knock Detector Circuit
The final circuit we will see deploys the ceramic sensor that is readily available. If you have experienced the difficult to detect the source of a low noise knock or […]