You Are Here: Home » Blog (Page 5)

A very simple DIY solar-powered USB charger

Yesterday, I built a very simple DIY solar-powered USB charger for my TP-link 10400mAh USB Power Bank. All I needed was a 6V/3.5W solar panel and the TD1410-based 5V buck converter module. I bought both of them on Aliexpress for less than $8. [caption id="attachment_36017" align="aligncenter" width="580"] Simplest DIY solar-powered USB charger[/caption] It was one of the easiest projects I built. All I need ...

Read more

Air pressure sensors in smartphones

Today’s smartphones utilize a wide array of accelerometers, gyroscopes and various other sensors in their designs. Relatively unknown is the barometric pressure sensor, which measures air pressure. These sensors are currently being integrated into premium-grade smartphones, but are also becoming more common in mainstream phones or wearables such as fitness trackers and Internet of Things (IoT) applications. ...

Read more

Circuit provides cold-junction compensation

The accuracy of any circuit or system that uses a thermocouple to determine the temperature of a process is limited by the accuracy of the method used to perform cold-junction compensation. In a thermocouple measurement, two wires of dissimilar metal join together at the "hot," or measurement, junction. The isothermal termination of the thermocouple wires provides a second "cold," or reference, junction. Th ...

Read more

100Vin, 5W out regulator uses primary-side control

Features 5.5V to 100V Input Voltage Range 450mA, 150V Internal DMOS Power Switch Up to 5W of Output Power Low Quiescent Current:  70μA in Sleep Mode  280μA in Active Mode Boundary Mode Operation at Heavy Load Low-Ripple Burst Mode® Operation at Light Load Minimum Load <0.5% (Typ) of Full Output VOUT Set with a Single External Resistor No Transformer Third Winding or Opto-Isolator Required for Regulation ...

Read more

Printable battery paves the way for custom-shape power sources

Using a simple stencil printing process followed by ultraviolet cross-linking, researchers from the Ulsan National Institute of Science and Technology (UNIST, South Korea) have demonstrated a new type of Printable Solid-State (PRISS) Lithium-ion batteries designed through successive layers of curable composite materials.The PRISS Batteries consist of a solid-state composite electrolyte (SCE) layer and SCE m ...

Read more

Website is Down Detector

If you work in a company that has a website, you know how important it is that the website always be up and running. That's why you constantly see "99.99999% reliability!" all over the fancy server hosting sites. A website can't make money if the system is down, so knowing when that happens and reacting quickly is super important. In this Instructable, we will use the LinkIT ONE board to make an alert syste ...

Read more

8 Channel Relay Board with onboard 5V regulator

This is a general purpose relay board accepting 8 inputs to drive 8 relays providing control requirement in your project. This board can also be used as an add-on card for the various Development board that we provide. Features Robust Design using NPN transistor to drive each relay Relay On Indicator LED for each of the eight relays. Back EMF / Surge protection diode across each relay to protect driving cir ...

Read more
Scroll to top