This is a small size power supply based on OPA549 power op-amp that provides output voltage 1.2V to 25V with 0 to 10A adjustable current limit. Two onboard trimmer potentiometers provided to adjust the voltage and current, LED D1 is over temperature indicator. The circuit works with input supply of 30V DC and logic supply […]
1.2V-25V/10A Adjustable Power Supply Using Power Op-Amp Continue Reading
When I started to deal with Chinese electronics suppliers from websites like Alibaba, Aliexpressand Taobao, I discovered that there are huge amount of undiscovered tools from the Chinese market. They are not easily discovered, maybe due to the Chinese language barrier, especially when we deal with a Chinese website like Taobao or maybe because most of us are
TOOLS FOR THE ELECTRONICS HOBBYIST PART 1- GRAPHICAL COMPONENTS TESTER Continue Reading
In early 1990s lithium-ion batteries started gaining popularity as a substitute for nickel-cadmium batteries. They have higher energy density, low self- discharge, and low maintenance, but it was soon found that they have short life span, unstability which causes security concerns and creates the need for protection circuits (to maintain it within safe limits), and
Could Sodium-ion Batteries be a Replacement for Li-ion Batteries? Continue Reading
The MMA7455L is a Digital Output (I2C/SPI), low power, low profile capacitive micromachined accelerometer featuring signal conditioning, a low pass filter, temperature compensation, self-test, configurable to detect 0g through interrupt pins (INT1 or INT2), and pulse detect for quick motion detection. 0g offset and sensitivity are factory set and require no external devices. The 0g
Using an MMA7455 accelerometer with an ESP32 board Continue Reading
Solar energy is renewable, free, widely available and clean form of energy. It is considered as a serious source of energy for many years because of the vast amounts of energy that is made freely available, if harnessed by modern technology. Many people are familiar with so-called photovoltaic cells, or solar panels, found on things
DIY USB 5V Solar Power Bank Continue Reading
Its been 70 years since the fundamental building block of electronics was created, and it has been getting smaller, and better since then. The invention that won the Nobel prize for John Bardeen, Walter Brattain, and William Shockley in 1956 revolutionized electronics and made it into the IEEE milestone list. Before 1947 computers used vacuum
Transistors- The 70-year-old invention that changed the world Continue Reading
Recently, many big companies such as Samsung have developed wireless chargers which work by induction. These chargers usually consist of a station which needs to be in contact with the device in order to charge. The station defeats the purpose of being able to move and walk while still charging the device. Energeous, a global
WattUp – RF based Wireless Charging at a Distance Continue Reading
NanoEngineers” research group at Iowa University have been devoting efforts to use graphene and its amazing properties in their sensors and other technologies. Graphene has many extraordinary properties. It is about 100 times stronger than the strongest steel. It conducts heat and electricity efficiently and is nearly transparent. Inspired by some recent projects about using inkjet printers to print
A LASER TREATMENT TO IMPROVE PAPER ELECTRONICS Continue Reading
INTRODUCTION In one of our previous tutorials we did an introduction on how to use the Nokia 5110 LCD with the Arduino, the tutorial covered displaying texts with different fonts etc. For this tutorial, we are taking things a little bit further and will be working through the display of customized graphics on the Nokia
Arduino Nokia 5110 Tutorial #2- Displaying Customized Graphics Continue Reading
I would feel so much safer on my next flight from Phoenix to Silicon Valley if I knew that there were safeguards in place inside passengers’ smartphones that could prevent fire and explosion from such design decisions like a company packing 10 pounds of Lithium-ion battery into a 5 pound compartment or a smartphone owner
Lithium-ion battery fires: 7 solutions for improved safety Continue Reading
