In the field of audio amplifiers OCL stands for Output Capacitor-Less Amplifier design. How it Works In this OCL type of amplifier topology or configuration, the power output stage is directly coupled to its preceding driver stage without coupling capacitors. The following figure shows a typical OCL amplifier output stage, as can be seen, the […]
New Circuit Projects
Automatic Irrigation Circuit using Arduino
In this post I will show how to construct an automated water irrigation system for small garden using arduino and soil moisture sensor. Introduction The proposed system can monitor the soil moisture level and when soil moisture goes below preset value, the 12V DC pump will be triggered for predetermined period of time. The status […]
3 Smart Laser Alarm Protection Circuits
In this post I have explained the making of 3 simple yet effective smart laser alarm protection circuit using the IC 555, for securing a specified restricted zone from human interventions. The idea was requested by Mr. Collins. Circuit Objectives and Requirements 1) The Design Parts List IC 555Pinouts Circuit Operation The proposed smart yet […]
Timer Based Cell Phone Charger Circuit
A simple cell phone charger with timer circuit is presented in the following article, which could be used for charging a given Mobile phone for a specified predetermined length of time. The idea was requested by Mr. Saad. Circuit Objectives and Requirements Could you design me this charger circuit ? Input 230V 60 Hz, and the […]
How to Connect an IR Photodiode Sensor in a Circuit
In this post I have explained how to correctly connect an IR photodiode in circuits such as a proximity sensor circuit. The explanation is presented in the form a discussion between one of the dedicated readers of this blog NVD, and me. Here’s the discussion which explains how to connect a photodiode in an electronic […]
Interfacing SD Card Module for Data Logging
In this post we are going to interface SD card module with arduino for data logging. We will see overview of SD card module and understand its pin configurations and on board components. Finally we will be constructing a circuit to log the temperature and humidity data to SD card. Secure Digital Card SD card […]
