Facebook Linkedin Telegram Youtube

Home
EFY PRIME
Projects (DIY)
Explore
What’s New
Jobs & Careers
- Jobs
- Post a Job
- HR Trends
- The Gurus
Specials
Shop

Search

LOGIN
REGISTER
Magazine
SHOP
ABOUT US
HELP
- FAQ
Explore Components on DigiKey

ElectronicsForU.comIf it\'s electronics, it\'s here.

Filter by Categories
Advanced Projects
Aerospace & Defence
AgriTECH
AI & ML Tech
AI and Machine Learning Projects
Arduino Projects
Automation
Automotive
AVR Projects
Basics
Beginners Projects
Business Leaders
Buyers' Guides
Chip Design & Manufacture Tech
Communication & Networks
Community Projects
Computer Science Projects with Step-by-Step Guides
Consumer
Cool Stuff
Countries
Covid-19 Projects
Design Guides
Design in India
Dev-Boards Projects
Digikey
DIY Projects with Video Tutorials
EDA, Software & Tools
Editor's Choice
EFY PRIME: For Premium Subscribers Only
EFY's Panel of Experts
EFY++ | Premium Content
Electronics Calculators
Electronics Manufacturing
Electronics News
Electronics Startups & Innovators
Electroons
Energy & Power
Engineering Projects For You
ESP32 Projects with Code, Circuit, and Step-by-Step Guide
Events
EXPERTS TALK
Hardware Guides
HR Trends
Image Processing Projects
Industrial
Industry Powered Content
Inspiring Women
Intermediate Projects
Investors Talk
Japan
Jobs
Jobs & Careers
Latest Components
LEDs & Lighting
Magazine Issues
Market Verticals
MATLAB Projects
Medical
MEGA COLLECTION OF ELECTRONICS DIY PROJECTS
Must Reads
My Story
New Products
[email protected]
Newsletter Messages
Not Categorised
Power Electronics Tech
Press Releases
Project Ideas
Raspberry Pi Projects
Reference Designs
Research & Papers
Resources
Slideshows
Software
Software Reviews
Solar
Special
Startup Contests
Super Innovative Projects
TAIYO YUDEN
Tech Contests
Tech Experts
Tech for Security & ID
Tech of Communication
Tech of Displays
Tech of Memory & Storage
Tech of Processors
Tech Of Robotics
Tech of Sensors
Tech Zone
Technology
Technology Focus
Testing Times
The Enablers
The Gurus
THE PITCH: Electronics Startups & Innovators
Truly Innovative Electronics
Videos
Videos & Slideshows
Webinars
What's New
White Papers

ElectronicsForU.comIf it\'s electronics, it\'s here.

Filter by Categories
Advanced Projects
Aerospace & Defence
AgriTECH
AI & ML Tech
AI and Machine Learning Projects
Arduino Projects
Automation
Automotive
AVR Projects
Basics
Beginners Projects
Business Leaders
Buyers' Guides
Chip Design & Manufacture Tech
Communication & Networks
Community Projects
Computer Science Projects with Step-by-Step Guides
Consumer
Cool Stuff
Countries
Covid-19 Projects
Design Guides
Design in India
Dev-Boards Projects
Digikey
DIY Projects with Video Tutorials
EDA, Software & Tools
Editor's Choice
EFY PRIME: For Premium Subscribers Only
EFY's Panel of Experts
EFY++ | Premium Content
Electronics Calculators
Electronics Manufacturing
Electronics News
Electronics Startups & Innovators
Electroons
Energy & Power
Engineering Projects For You
ESP32 Projects with Code, Circuit, and Step-by-Step Guide
Events
EXPERTS TALK
Hardware Guides
HR Trends
Image Processing Projects
Industrial
Industry Powered Content
Inspiring Women
Intermediate Projects
Investors Talk
Japan
Jobs
Jobs & Careers
Latest Components
LEDs & Lighting
Magazine Issues
Market Verticals
MATLAB Projects
Medical
MEGA COLLECTION OF ELECTRONICS DIY PROJECTS
Must Reads
My Story
New Products
[email protected]
Newsletter Messages
Not Categorised
Power Electronics Tech
Press Releases
Project Ideas
Raspberry Pi Projects
Reference Designs
Research & Papers
Resources
Slideshows
Software
Software Reviews
Solar
Special
Startup Contests
Super Innovative Projects
TAIYO YUDEN
Tech Contests
Tech Experts
Tech for Security & ID
Tech of Communication
Tech of Displays
Tech of Memory & Storage
Tech of Processors
Tech Of Robotics
Tech of Sensors
Tech Zone
Technology
Technology Focus
Testing Times
The Enablers
The Gurus
THE PITCH: Electronics Startups & Innovators
Truly Innovative Electronics
Videos
Videos & Slideshows
Webinars
What's New
White Papers

Sign in

Welcome! Log into your account

your username

your password

Forgot your password? Get help

Create an account

Create an account

Welcome! Register for an account

your email

your username

A password will be e-mailed to you.

Password recovery

Recover your password

your email

A password will be e-mailed to you.

Wednesday, June 17, 2026

LOGIN
REGISTER
Magazine
SHOP
ABOUT US
HELP
- FAQ
Explore Components on DigiKey

Electronics For You | DIY Projects, News, Jobs and Expert InsightsIf it\'s electronics, it\'s here.

Home
EFY PRIME
Projects (DIY)
Explore
What’s New
Jobs & Careers
- Jobs
- Post a Job
- HR Trends
- The Gurus
Specials
Shop

Filter by Categories
Advanced Projects
Aerospace & Defence
AgriTECH
AI & ML Tech
AI and Machine Learning Projects
Arduino Projects
Automation
Automotive
AVR Projects
Basics
Beginners Projects
Business Leaders
Buyers' Guides
Chip Design & Manufacture Tech
Communication & Networks
Community Projects
Computer Science Projects with Step-by-Step Guides
Consumer
Cool Stuff
Countries
Covid-19 Projects
Design Guides
Design in India
Dev-Boards Projects
Digikey
DIY Projects with Video Tutorials
EDA, Software & Tools
Editor's Choice
EFY PRIME: For Premium Subscribers Only
EFY's Panel of Experts
EFY++ | Premium Content
Electronics Calculators
Electronics Manufacturing
Electronics News
Electronics Startups & Innovators
Electroons
Energy & Power
Engineering Projects For You
ESP32 Projects with Code, Circuit, and Step-by-Step Guide
Events
EXPERTS TALK
Hardware Guides
HR Trends
Image Processing Projects
Industrial
Industry Powered Content
Inspiring Women
Intermediate Projects
Investors Talk
Japan
Jobs
Jobs & Careers
Latest Components
LEDs & Lighting
Magazine Issues
Market Verticals
MATLAB Projects
Medical
MEGA COLLECTION OF ELECTRONICS DIY PROJECTS
Must Reads
My Story
New Products
[email protected]
Newsletter Messages
Not Categorised
Power Electronics Tech
Press Releases
Project Ideas
Raspberry Pi Projects
Reference Designs
Research & Papers
Resources
Slideshows
Software
Software Reviews
Solar
Special
Startup Contests
Super Innovative Projects
TAIYO YUDEN
Tech Contests
Tech Experts
Tech for Security & ID
Tech of Communication
Tech of Displays
Tech of Memory & Storage
Tech of Processors
Tech Of Robotics
Tech of Sensors
Tech Zone
Technology
Technology Focus
Testing Times
The Enablers
The Gurus
THE PITCH: Electronics Startups & Innovators
Truly Innovative Electronics
Videos
Videos & Slideshows
Webinars
What's New
White Papers

HomeVideos & SlideshowsVideosHow To: Charge your phone with a 9 volt battery!

Videos & Slideshows Videos

How To: Charge your phone with a 9 volt battery!

-

August 1, 2015

RELATED ARTICLES

Videos & Slideshows

From Sensor to Insight: Using NI DAQ for Intelligent electromechanical test and control applications

Videos & Slideshows

Live DIY: Auto Dusk-to-Dawn LED Strip on/off with Timer

Videos & Slideshows

Make Your Own Rotary Switch Timer

Videos & Slideshows

Build & Learn Electronic Circuits on a Breadboard

Videos & Slideshows

DIY: Audio Signal–Controlled LED Display Using LM3914

Check out this simple trick to charge your cell phone with a 9 volt battery.

Courtesy: HarleyWood23

Tags
tutorial

Previous article

How to Make a Huge Light Up LED Sign

Next article

“We are currently working on a processor-based IoT gateway that would be at the heart of IoT applications”

Official Author account for Electronics For You

SHARE YOUR THOUGHTS & COMMENTS Cancel reply

Register or Login to leave a comment.

EFY Prime

Global Navigation Satellite Systems With Centimetre-Level Accuracy

Print and Build Your Own Full-Scale Humanoid Robotic Arm

Sawtooth Wave Generator Using 4-Bit DAC

CAN-Bus-Based Doppler Radar and IMU Sensor System

Unique DIY Projects

Real-time Web-based Home Automation

World’s Smallest Open-Source LoRa + GPS Module for Wearables and IoT (Only 3cm!)

Smallest Spy Video Streaming Camera

Wirelessly Control Multiple AC Appliances with Web Interface

Electronics News

Battery less Artificial Photosynthesis System Produces Solar Fuel

Foldable Solar Cells Move Closer to Space Radiation

Mobile Radar Upgrade Targets Maritime Drone Threats

Photonic Computing Lab Targets Faster AI Processing

Truly Innovative Electronics

Integrated hardware and AI system

Edge AI Memory Efficiency Increased

The World’s First Native Color Lidar

Strong radio signal detection and Geolocation to the Tactical Edge

Latest DIY Videos

Live DIY: Auto Dusk-to-Dawn LED Strip on/off with Timer

Make Your Own Rotary Switch Timer

DIY: Audio Signal–Controlled LED Display Using LM3914

State Reduction In Sequential Circuits

Electronics Components

Series SMD Fuse for High-Current

Automotive Ferrite Beads for Advanced EMC Filtering

650V GaN Power Switch for Industrial Systems

New FPGA-Powered Console

Electronics Jobs

JOB: Continuous Improvement Specialist At ABB In Bengaluru

JOB: Electronic Compliance Engineer At Cyient In Pune

Intern-Technology At Emerson In Noida

Robotics – Internship At Fx31 Labs In Ahmedabad

Calculators For Electronics

Circuit Design Calculators for Engineers and Students

Broadside Coupled Stripline Impedance Calculator

Edge Coupled Stripline Impedance Calculator

Asymmetric Stripline Impedance Calculator

© Copyright 2026 - EFY Group

Shipping Policy| Contact us| Terms & conditions| Privacy policy| Cancellation/Refund Policy | Sitemap

×

" "