Simple 9V USB charger

I’ve made a very simple portable USB charger, using a 9V battery as a power supply. I’m using this to charge my MicroTrack when I’m in a middle of a field recording and power runs out.

I’ve used a 7805 voltage regulator IC, 2 pieces of 0.1uF electrolytic capacitors, a switch, battery holder, USB A connector, heat sink for the regulator, some wires and a plastic box. You can view the schematics here.

UPDATE: Mozso noticed me that two 100 nF ceramic capacitors are needed too. I’ve updated the schematics.

I don’t know how long the battery will last, but I’ll write about it. Unfortunately, (9V-5V)*500mA = 2 watts are dissipated through the heatsink.

Name (required)
E-mail (required - never shown publicly)
Webpage URL
Comment:
You may use <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <s> <strike> <strong> in your comment.

Trackback responses to this post

About me

Nonoo
I'm Nonoo. This is my blog about music, sounds, filmmaking, amateur radio, computers, programming, electronics and other things I'm obsessed with. ... »

Twitter

Listening now

My favorite artists