Electronics

Pocket size FM receiver

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Below is the circuit idea for pocket size FM receiver using RF transistors. The circuit works off a small 4.5 volt battery or 5v USB. The heart of the circuit is the two RF transistors T1 and T2 to detect the Frequency Modulated signals.Coil L1 and the trimmer capacitor form the tuned circuit to tune […]

Electronics

How to make digital clock using Arduino and DS1302

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To make a digital clock using Arduino and DS1302 we need following materials. Arduino UNO ( you can use any arduino) 16*2 LCD display DS1302 module/chip 1.2 k resistance Variable resistance 10k Pot Make the connections as mentioned below: Connecting the LCD: VSS –> GND Arduino VDP –> 5V Arduino VO –> output potentiometer (potentiometer […]

Electronics

Top 8 Post of 2017

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Summarizing the year with top post of the year 2017 Optimize Azure cost using automation account How to Install Linux Bash shell on Windows 10 UI Automation using Appium and WinAppDriver   How to Measure DevOps Success? Home Automation using Arduino UNO How to set-up Wireless on your Raspberry Pi Web server on raspberry pi […]

Electronics

How to make a Tachometer for bicycle

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To make a tachometer for bicycle tachometer we will be using Arduino and reed switch as the main component. We will design the tachometer to Display Speed and also temperature. Following are the list of components required. Parts list: Arduino Bicycle with reed switch LCD display 16×2 thermometer DS18B20 Servo resistor 1.2k Ω , 4.7k […]

Electronics

Home Automation using Arduino UNO

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In this post we will be designing home automation using Arduino UNO and IR remote control device. Components Required Arduino UNO board TSOP 1738 IR Remote Control Receiver 1 KΩ Resistor X 4 2N2222 NPN Transistor X 4 1N4007 Diode X 4 12 V Relay X 4 – relay board Remote Control Prototyping board (Bread […]

Electronics

Time delay relay circuit

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What is a time delay relay circuit? In a time delay relay circuit, relay contacts are closed or open after the preset time interval. Whereas in a normal relay contacts are open/closed immediately when coil is energized. It prevents the damaging effect of voltage spikes or input surge current by delaying the relay on/off. Schematic […]

Electronics

1 Watt audio amplifier for Mobile device

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About LM4890 1 Watt audio amplifier for mobile device has been designed using LM4890 power amplifier. LM4890 is primarily designed for mobile phones and other portable devices. It is capable of delivering 1 watt of continuous average power to an 8 ohm load from 5v power supply. It has a distortion of less than 1%. […]

Electronics

Real time clock with DS1302

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Real time clock with DS1302 is designed using Arduino Uno. About DS1302 The DS1302 is a trickle-charge timekeeping chip containing a real-time clock/calendar and 31 bytes of static RAM. It communicates with a microprocessor via a simple serial interface. The real-time clock/calendar provides seconds, minutes, hours, day, date, month, and year information. DS1302 requires only […]

Electronics

Seven segment display counter

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A seven segment display is typically used to display numbers from 0-9. It consists of 7 bar segments and a dot( 8 Segments). They are numbered A to F and DP for the dot or decimal place. There are 2 types of 7 Segment display Common anode Common cathode   Seven Segments are labelled as below. […]

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 […]