Hi, I’m Daniel, a professional software developer. This is my very first instructable, and I’m über-excited. I hope you’ll like. 🙂 With this instructable, I try to solve a problem everyone has: Passwords. Accounts. Logins. All the stuff you need to get into your favourite social media site, shopping site, blog or forum (they still […]
An Edison-Based Password Keeper Read More »
Features Multichemistry Li-Ion/Polymer, LiFePO4, or Lead- Acid Battery Charger with Termination High Efficiency Synchronous Buck Battery Charger Digital Telemetry System Monitors VBAT, IBAT, RBAT,NTC Ratio (Battery Temperature), VIN, IIN, VSYSTEM, Die Temperature Coulomb Counter and Integrated 14-Bit ADC Wide Charging Input Voltage Range: 4.5V to 35V Wide Battery Voltage Range: Up to 35V Input Undervoltage Charge Current Limit
LTC4015 – Multichemistry Buck Battery Charger Controller with Digital Telemetry System Read More »
Li-ion cells become more and more popular due to their capacity and reasonable prices. In this entry I will show how to build a simple li-ion battery charger based on MCP73831 chip. It’s a quite useful device for DYI projects, in addition its cost is only around 1,5 euro. The device uses USB port as
Build A Simple USB Li-Ion Battery Charger Based On MCP73831 Chip Read More »
A low-magnification tunneling electron microscope (TEM) image of Gr–Si nanoparticle (NP). (b) A higher-magnification image for the same Gr–Si NP from the white box in a. (Insets) The line profiles from the two red boxes indicate that the interlayer spacing between graphene layers is ~3.4 Å, in good agreement with that of typical graphene layers based
Samsung Researchers Nearly Double Lithium-ion Battery Capacity Read More »
Features Step-Up Backup Supply and Step-Down Battery Charger 6.5A Switches for 2.5A Backup from 3.2V Battery Input Current Limit Prioritizes Load Over Charge Current Input Disconnect Switch Isolates Input During Backup Automatic Seamless Switch-Over to Backup Mode Input Power Loss Indicator System Power Loss Indicator Pin Selectable Battery: Li-Ion (3.95V/4.0V/4.05V/4.1V) or LiFePO4 (3.45V/3.5V/3.55V/3.6V) Optional OVP Circuitry Protects Device
LTC4040 – 2.5A Battery Backup Power Manager Read More »
The wearables market is booming. Statistics aggregator web portal Statista, notes that the global market will be worth over $7 billion this year and $12.6 billion by 2018. Although the potential rewards are high, this is not an easy market to enter. Designing smart watches or fitness bracelets is tough; consumers expect lots of functionality,
Extending Battery Life in Wearable Designs Read More »
One of the main problem in battery powered projects is to choose/use the proper battery size/model/type. As market is flooded now with a lot of low quality batteries claiming thousands of mAh ( Ultrafire fakes stories is just an example) the only way to proper check them is to run a set of tests. A
WIFI Battery Monitor System – ESP8266 Read More »
This project is a 12V Lead Acid Battery Voltage Monitor Description 12V Lead Acid Battery Monitor is a simple project which tells you the voltage of your Lead acid battery visually with the help of 10 LED’s. This project is based on the popular LM3914 IC from Texas Instruments. The LM3914 senses the voltage level
12V Lead Acid Battery Voltage Monitor Read More »
Here is a tried and tested sample circuit of a Li-Ion battery charger that can be used to charge any 3.7V Li-Ion battery using a 5VDC (USB, Solar Panel…) power supply. At the heart of the circuit is one microchip MCP73831, available in SOT-23-5 package. MCP73831 is a highly advanced linear charge management controller for
3.7V Li-Ion Battery Charger Circuit Read More »
I’m working on a prototype product(Wifi motion sensor) that will be powered from a battery source, it has a mega328(arduino bootloader, with sleep mode on and wake on interrupt,and WDT in case it hangs up), a PIR motion sensor , and a CC3000 break out board. Power saving is done in software, but what type
Battery powered device hardware design tips Read More »
