A sensitive amplifier with a filter is needed to process signals from ultrasonic or infrared sensors. The GL3274 IC, designed for infrared receivers, is used for this purpose. It operates at 4.7–5.3 VDC and features internal protection, band-pass and low-pass filters, and comparators. Replacing a photodiode with an ultrasonic receiver enables accurate distance measurement.
How to use Hall-effect sensors: This guide covers the differences between reed switches and Hall sensors, the principles behind Hall-effect operation, and how to connect analog and digital Hall sensors in circuits. It includes a step-by-step process for assembling a magnetic polarity detector using digital Hall sensors.
Learn how to create a DIY voltage-boosting LED driver using the principles of a step-up (boost) converter. The guide covers the design and operation of pulse power converters, focusing on current and voltage feedback mechanisms, using a homemade LED flashlight as an example. It details the assembly of a step-up converter with adjustable brightness, utilizing components like coils, capacitors, and a feedback system for effective voltage regulation.
Constructing a custom fitness tracker or gesture recognition device requires an accelerometer, specifically the ADXL335. This compact sensor detects acceleration through a suspended mass that shifts during movement. The setup involves connecting capacitors and operational amplifiers to process the sensor's output. The article outlines the steps to create a step counter by filtering and amplifying the signal, resulting in clock pulses for counting. A video demonstration showcases the circuit in action.
Create a touch sensor-controlled LED lamp with dimming and rechargeable features. This guide provides step-by-step instructions for building it yourself, using easily accessible components.
