Introduction: USB Charger 9V

Easy make portable USB charger

Step 1: Need

Need:

Case

lm7805 voltage regulator

batery clip

9V batery

USB

switch

pliers

soldering iron

glue gun

Step 2: Circuit

It's so EASY!!!

Step 3: Fold

Fold voltage regulator (lm7805) contacts

Step 4: Cut Wires

Cut wires from batery clip (4-5cm)

Step 5: Solder

Solder 2 black wires (from batery clip and witch cut off) to voltage regulator ground. Red wire (from batery clip) solder to voltage regulator input.

Step 6: Solder (part 2)

Red wire (witch cut off) solder to USB +. Black wire (witch cut off) solder to USB -.

Circuit is done!

Step 7: Cut Holes

With pliers cut holes to USB and switch.

Step 8: Glue It !

Glue USB and switch in holes. Voltage regulator glue to case wall.

Step 9: Done!

Enjoy and charge your device!

Comments

author
Gomi no Sensei (author)2015-11-30

Most smart phone batteries are 1500-3300mah.

A 9V battery has 50-400mah and at 500mw load has less than 300mah capacity.

You're also losing 30% of that 300mah thru the 7805 as heat.

Just exactly HOW much does this remaining 210mah charge your phone ???

Ref : http://www.powerstream.com/9V-Alkaline-tests.htm

author
fritzstoop (author)2015-09-02

is this to charge the battery itself?

author
dovnel (author)2014-09-30

Cool!

author
tkleinauskas (author)dovnel2014-11-04

Thanks!

author
craftclarity (author)2014-06-11

Nicely documented, thanks for sharing this..!

author

Thank you

author
dariuxas (author)2014-10-01

Cool!

author
tkleinauskas (author)dariuxas2014-10-01

Thanks!

author
dariuxas (author)2014-10-01

Cool!

author
tkleinauskas (author)dariuxas2014-10-01

Thanks!

author
dariuxas (author)2014-10-01

Cool!

author
tkleinauskas (author)dariuxas2014-10-01

Thanks!

author
dariuxas (author)2014-10-01

Cool!

author
tkleinauskas (author)dariuxas2014-10-01

Thanks!

author
dariuxas (author)2014-10-01

Cool!

author
tkleinauskas (author)dariuxas2014-10-01

Thanks!

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