Electronics

Plus/minus supply using LMC7660

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LM 7660 is a CMOS voltage convertor capable of converting a positive voltage in the range of +1.5 v – 10 v to the corresponding negative voltage of -1.5v to -10v using very few external components. Below is the schematic diagram for the same. We can use this get +/-5v from different sources like from […]

Electronics

Bicycle USB Charger

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This circuit has been developed to add a USB charging port to a bicycle for charging a mobile phone. The input supply for the circuit is produced by a dynamo (6V, 3W dynamo) in the bicycle. The circuit is based on LM2596-5.0. It is a 3A step down voltage regulator. LM 2596 are available in […]

Electronics

Light Sensor using Arduino

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Introduction In this project, a simple light sensor is designed using LDR. The project is built around Arduino. Components required Arduino UNO Light Dependent Resistor (LDR) 100 KΩ POT Buzzer Circuit Diagram Working A 100 KΩ POT and the LDR form a voltage divider and the output of the voltage divider is given to the […]

Electronics

What is Omega 2 Board?

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Omega 2 board is the development boards from Onion. It comes packed with built-in Wi-Fi and on-board flash storage. You do not have to worry about buying Wi-Fi dongles or installing operating system images onto external SD cards. Using the Omega2 is just like using a desktop computer. It has built simple and intuitive apps  […]

Electronics

Make your own Li-ion power bank

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Introduction There are many ways to make a Li-ion power bank. We will here use 3.7v Li-ion rechargeable battery and few other modules. You can purchase the battery from ebay or Aliexpress or extract from your old laptop battery. This power bank can be used for charging smartphones. What all you need ? Following are the […]

Electronics

Microphone pre amplifier using LM358

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Pre amplifier using LM358 Components LM358 R1 – 10k R2 – 47k R3 – 10k R4 – 10k 1M POT C1 -4.7 μf C2 – 10 μf This is a simple mic pre amplifier using LM358. The circuit is self explanatory and is based on LM358 op-amp. The main function of a pre amplifier is to amplify […]

Electronics

How to connect 16*2 LCD display Arduino UNO

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To Connect 16*2 LCD Display Arduino Uno we will use the previous project to capture temperature and display on console. Parts required for the project: Arduino IDE to program the code and upload OneWire and DallasTemperatre library for the Arduino and DS18B20 One DS18B20 digital temperature sensor Arduino UNO R3 16*2 LCD display Jumper wires […]

Electronics

Servo Motor Control using Arduino

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Following post will explain Servo motor control using Arduino UNO 3. Servo motors have three wires: power, ground, and signal. The power wire is typically red, and should be connected to the 5V pin on the Arduino board. The ground wire is typically black or brown and should be connected to a ground pin on […]