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Digital Lab

A home to software testing, electronics circuits & projects, tips and tricks and digital diary.

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Digital Lab

A home to software testing, electronics circuits & projects, tips and tricks and digital diary.

Buy electronic components online in India

There are many online sites from where to buy electronic components online in India. Some of the most popular ones are listed below. My favourite is OnlineTPS.com, in.rsdelivers.com and Aliexpress.com Below are sites which I have tested and are good. …

  • June 26, 2016
  • Electronics
Read MoreBuy electronic components online in India
Raspi_Config

Remote controlling Raspberry Pi

Remote controlling Raspberry Pi using SSH Enable SSH in raspberry pi using the command raspi-config From window machine use putty to connect to Raspberry Pi From Linux Machine or Mac use terminal to connect eg: ssh pi@xxx.xxx.xxx.xxx Remote controlling Raspberry…

  • September 16, 2022
  • Electronics, Raspberry Pi
Read MoreRemote controlling Raspberry Pi

7 Segment Display

A 7 segment display is typically used to display numbers from 0-9. It consists of 7 bar segments and a dot( 8 Segments). Segments are numbered A to F and DP for the dot or decimal place. There are 2 types…

  • August 9, 2015
  • Electronics, Tutorials
Read More7 Segment Display

Risk based testing

What is risk ? Risk is an uncertain event or condition that, if it occurs, has an effect on at least one objective. or The probability of something happening multiplied by the resulting cost or benefit if it does. (This…

  • August 3, 2015
  • Software Testing
Read MoreRisk based testing

Simple High Pass Filter

Part List IC1 – LM741 R1 – 3k R2,R3 – 90K R4 – 390 K R5 – 680 K C1,C2,C3 – 0.0047 uf Power Supply – 12v Dual Supply  

  • January 22, 2016
  • Electronics
Read MoreSimple High Pass Filter

How to install NOBS for Raspberry Pi

Note: Please note that NOOBS is no longer supported or recommended. Please switch to Raspberry Pi Imager. If you still require multi-boot functionality, consider switching to PINN, which is an unofficial fork with additional features. Install NOBS for Raspberry Pi To…

  • July 12, 2025
  • Electronics, Raspberry Pi
  • 1 Comment
Read MoreHow to install NOBS for Raspberry Pi

Raspberry Pi 2, Model B

Raspberry Pi 2 Model B delivers 6 times the processing capacity of previous models. This second generation Raspberry Pi has an upgraded Broadcom BCM2836 processor, which is a powerful ARM Cortex-A7 based quad-core processor that runs at 900MHz. The board…

  • September 16, 2022
  • Electronics, Raspberry Pi
Read MoreRaspberry Pi 2, Model B

The Economies of Software Testing

What do you mean by Economies of Software testing? Why software defects are costly to find and fix? How early defect detection can save much cost in fixing defects? There is a definite economic impact of software testing. One economic…

  • June 26, 2016
  • Software Testing
Read MoreThe Economies of Software Testing

How To Make WiFi Tethering in Windows 8.1

Steps to Configure Wifi Tethering in Windows: Launch an elevated command prompt under Windows 8 (command prompt with administrator privileges). To do this Press Windows + x key in windows 8 and click Command Prompt (Admin). Execute the below command to verify…

  • March 7, 2015
  • How-To
Read MoreHow To Make WiFi Tethering in Windows 8.1

Solar power supply circuit

This solar power supply circuit project uses the 1.2v rechargeable battery and solar panel. The solar panel charges the battery when sunlight is bright enough to produce a voltage above 1.9v. The regulator transistor is designed to limit the output voltage…

  • July 1, 2016
  • Electronics
Read MoreSolar power supply circuit
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