Useful tips for everyday
How much RAM do I need for RetroPie? If you plan on using your Raspberry Pi 4 as a Linux desktop and RetroPie on occasion,…
How do I open Safari Preferences menu? 1. Open Safari, and choose Safari > Preferences. Note: If you are viewing Safari in full-screen mode, mouse…
What are different types of RFID? Each RFID type can be either active (powered), passive (un-powered) or semi-passive (battery-assisted). Low-frequency (LF) RFID tags: 30 KHz…
How can I see file sizes in Google Drive? Drive At drive.google.com, look near the bottom of the left column for the text listing the…
Can you backup one external hard drive to another? This is why backing up data from an external hard drive to another external hard drive…
How to create a database for a quiz? You can either join from there onto the answers to do one big query to get all…
How is current measured in a power supply? Power supplies use an internal shunt resistor to measure current. Figure 1. Keysight E36312A measuring the voltage…
What is root mean square error? Root mean squared error (RMSE) is the square root of the mean of the square of all of the…
How do you calculate RF output impedance? In general, to measure an output impedance, you just connect a known impedance across it and measure the…
What is Dashboard in web design? Dashboard is usually the one page that the users see first thing in the web application. It is the…