DIY USB power bank from laptop battery
https://www.electronics-lab.com/diy-usb-power-bank-laptop-battery/
A DIY USB power bank made from an old laptop battery @ DoItYourselfGadgets: A situation many can relate to: an empty smartphone battery and no outlet around! That’s exactly why I recycled an old laptop battery into an USB power bank. This article will show you the basic powerbank circuit consisting of Lithium cell charging circuit, […]
Reverse Engineering a Simple Four Function Calculator: die decap
https://www.electronics-lab.com/reverse-engineering-simple-four-function-calculator-die-decap/
Electronupdate did a teardown and analysis of a cheap four function calculator: It’s such an amazingly old looking die. Even with 400x magnification it would not be too hard to reverse engineer back to a schematic! This must be a very old design indeed. When one thinks of high-tech it’s always the new-new thing… however […]
Whoa Board: Dream With Touch Sensing EL Wire, Panels, Paint
https://www.electronics-lab.com/whoa-board-dream-touch-sensing-el-wire-panels-paint/
The Whoa Board makes things glow. It also makes glow-y things sense touch. It’s an open prototyping platform for wearable electronics! Turn any EL (Electro-Luminescient) material into a touch sensor with no additional hardware. It’s an open prototyping platform for wearable electronics! Open source and Arduino IDE compatible. Whoa Board: Dream With Touch Sensing EL Wire, […]
ElbSupply – Linear Bench Power Supply With Constant Current and Voltage Modes
https://www.electronics-lab.com/elbsupply-linear-bench-power-supply-constant-current-voltage-modes/
A lot of power supply designs are here and there on the Internet, but not all of them have constant current and voltage modes. You can read the following Q&A in electronics.stackexchange to learn what constant current and voltage modes mean. Elia over Hackaday.io built a linear bench power supply with the following features: Output […]
DIY USB to TTL Converter
https://www.electronics-lab.com/diy-usb-to-ttl-converter/
ams31 @ instructables.com show us how to build a DIY USB to TTL Converter using CH340G IC. Lots of USB to TTL modules are available in the market based on various chips like PL2303, FT232, CP2102 and CH340g. I have decided to use CH340g IC. Low costing clones of Arduino UNO & Arduino Nano also […]
25V, 600 mA buck-boost DC/DC with 1.6 µA Iq
https://www.electronics-lab.com/25v-600-ma-buck-boost-dcdc-1-6-%c2%b5a-iq/
LTC3130 and LTC3130-1 are synchronous current mode buck-boost converters that deliver up to 600 mA of continuous output current from a wide variety of input sources, including single- or multiple-cell batteries as well as solar panels and supercapacitors. By Graham Prophet @ edn-europe.com Their 2.4V to 25V input voltage range and 1V to 25V output […]
Drone The Quadcopter
https://www.electronics-lab.com/drone-the-quadcopter/
Sameer Gupta tipped us with his latest project, a DIY Quadcopter: “Drone The Quadcopter” is an featured UAV. I design my project with F450 arm in X-mode design. The full operation takes place via a Flysky FSCT6 remote control unit which gives a better operating range of 800 Meter to 1.2KM. Drone The Quadcopter – […]
Everything You Need To Know About Bluetooth beacons in A White Paper
https://www.electronics-lab.com/everything-need-know-bluetooth-beacons-white-paper/
Bluetooth 4.0 introduced the Bluetooth low energy (BLE), which is a version of Bluetooth protocol designed for devices with power constraints like battery powered sensors. Bluetooth low energy beacons are BLE (Bluetooth Low Energy) enabled devices, they repeatedly broadcast radio signals to nearby smartphones, containing a small amount of data. Mobile apps can listen to […]
How to compare your circuit requirements to active-filter approximations
https://www.electronics-lab.com/compare-circuit-requirements-active-filter-approximations/
By Bonnie C. Baker (WEBENCH® Senior Applications Engineer): Numerous filter approximations, such as Butterworth, Bessel, and Chebyshev, are available in popular filter software applications; however, it can be time consuming to select the right option for your system. So how do you focus in on what type of filter you need in your circuit? This […]
RFM69 WIFI Gateway
https://www.electronics-lab.com/rfm69-wifi-gateway/
The RFM69GW is a RFM69 to MQTT gateway that uses the ubiquitous ESP8266 chip. There are two or three similar projects that I’m aware of but I’ve put together some hardware and firmware features that make it different. by Xose Pérez: I’m using Felix Rusu’s RFM69_ATC library so it supports Monteino nodes with Auto Transmission […]