I’ve had a Siglent SDS1102CML two channel 100 MHz bench scope here for the last two years. I demand a lot from my test equipment so had low expectations when it arrived. After all, how good can a $359 unit be? Turns out, quite a good for the price. I reviewed it here. But the […]
Review: Siglent SDS 2304X oscilloscope Continue Reading
The “I’m Fine” project is about monitoring the well being of especially lonely elderly people, who may not have daily contact to the family. Things used in this project Hardware components Arduino MKR1000 × 1 Arcade style button (60 mm diameter) with builtin LED light. I chose this type of button as I’d like it
How does a tiny chip time the runners in the Bay to Breakers race? In this article, I take die photos of the RFID chip used to track athletes during the race. Bay to Breakers is the iconic San Francisco race, with tens of thousands of runners (many in costume and some in nothing) running
Inside the tiny RFID chip that runs San Francisco’s race Continue Reading
The simplest model of a battery comprises an ideal voltage source that connects in series with a resistance whose value—often a few milliohms—depends on the battery’s electrochemical condition and construction. If you attempt to use an ordinary ac milliohmmeter containing a kilohertz-range ac excitation source to measure a battery’s internal resistance, you get erroneous results
Dynamic-load circuit determines a battery’s internal resistance Continue Reading
So, you’re an electronics hobbyist and want a 1GHz* active probe, or a professional and tired of blowing your 2000$+ active probe in sketchy circuits when all you wanted to know are the whereabouts of some RF-signal? Then stay with me!! This Instructable will show you how to build a 1GHz* Fet-based Active Probe, the
DIY 1GHz Active Probe For Under 20$ Continue Reading
In this DIY project we make a 3-Channel Arduino Relay Shield Circuit for relay based applications. We designed an isolated PCB for 3 relays. By using this Arduino Relay Shield, we can operate 3 AC appliances at a time. We have put a two pin screw terminal blocks (Neutral, NO) for connecting appliances. Here we have provided PCB layout, circuit
DIY Arduino Relay Driver Shield Continue Reading
Designing a DC/ DC converter that only consumes micro amps of current at no load can be compared to fueling a muscle car with lighter fluid – you may get it to work, but it won’t be easy. High efficiency at full load currents is commonplace in most modern DC/DC converters; however, achieving high efficiency
How to Improve Buck DC Converter Light Load Efficiency with an LDO Continue Reading
Arduino-Remote Control Home Automation In this project, we are going to show you how to control home appliances using a TV Remote. This same principle can be applicable in offices and industries as well. The project deals with the automation of four home appliances, like Tube lights, fan, bulbs, and of course TV. To automate them,
Project: Home Automation Using IR Remote Control Continue Reading
Most hobbyists and many professionals use Eagle CAD as a daily tool in designing schematics and laying out PCB. I’m going to share with you the most important tips and tricks for using Eagle CAD, which make my work much easier and faster. Tip #1: Keep One Hand on the Keyboard, One on the Mouse
Eagle CAD Tips and Tricks Continue Reading
For Project Whack a Mole I need a 32.768kHz crystal oscillator. I found this circuits on the Interwebs and gave it a try: It wouldn’t go. I messed about changing component values for while, then decided to actually try to understand the circuit. Now for an oscillator to work, we need an amplifier with a
Troubleshooting a 32kHz Crystal Oscillator Continue Reading
