Welcome to the N1IR Electronics Website. Totally off the cuff, one take, unrehearsed video projects for anyone interested in amateur radio, electronic design, makers, hardware hackers and science.


Get off you duff and build something!
Training the hand and mind since 1982.

Saturday, December 21, 2013

EEWeb.com

Just got an email a couple of weeks ago introducing me to this site. Check out the link below on the right. I'm really impressed I am still going though it all there is so much information. Go check it out, thanks Algen for the great site.

Baofeng UV-5R Charger Modification

Hi all,
I've had my Baofeng UV-5R for a few months now and wanted to charge from my camper and car. Unfortunately I noticed the input voltage for the charger was 10 Volts DC in, very strange. Usually Chargers operate from 12VDC, so off to the internet I went.

I took the charger apart and found one IC (hxn-ws), so I tried finding the datasheet but could not, usually in the data-sheet it would give me the max voltage that I could apply in the specs.

Rather than risk the charger and put too much voltage and possibility blow the charger IC I decided  to place a linear regulator in. All I had on hand were some LM7805 and 5.1 Volt Zener so I came up with this.



By using this circuit my charger can now safely operate from 10-35VDC Input, at only 400mA max current the LM7805 is overkill. This was an easy mod drilling only three holes and scraping some solder resist off.












Thursday, December 19, 2013

Fall semester is over

Just finished CSC1050 at FSU, I should be ramping up the post and a few days.