Protection from cheap power supplies.

-

many of cheap power supplies rely on capacitor limit current mains voltage, yesterday on died after phone charger failing , sending 120/240vac phone...

what's easiest/best way of stopping this? want sit circuit between cheap power supply (5v out) , phone/ device, if goes on 5v kill it.

but dose of 120/240v kill protection circuit.

tvs diodes?
mov?

i'm not sure... if it's possible without kind of isolation? (transformer) if defeats purpose of cheap power supplies!

use better power supplies. 5v switching supplies can had <$5
http://www.dipmicro.com/store/dca-0510
a input/output box fuse, resettable or otherwise, blows overcurrent it.


Arduino Forum > Using Arduino > General Electronics > Protection from cheap power supplies.


arduino

Comments

Post a Comment

Popular posts from this blog

Connecting Raspberry Pi 2 to P10(1R)-V706 LED Dot Matrix - Raspberry Pi Forums

-
Image
hello everyone, name kedi.. make system connecting raspberry pi 2 , arduino uno arduino adc of 1 dust sensor sharp gp2y1010au0f , 4 gas sensor. want show decision of air quality system in running text @ p10 16x32 led dot matrix display. in raspberry pi 2, connect p10 pins in gpio25, gpio12, gpio16, gpio13 & gpio26. now, i'm finish circuit , don't know must connect p10's vcc & ground (red & black wire). can me? , code in python controlling p10(1r)-v706 dot matrix?.. regards, kedi i can't python code (did mine in basic on risc os) regarding power, panels each require 2.5a, you'll need separate supply them. if attempted power them pi, pi's polyfuse blow immediately. alternatively, use supply capable of giving 10a supply both panels , pi. raspberrypi
Read more

TypeError: <unknown> is not a numpy array - Raspberry Pi Forums

-
hi, thank help. question simple: how convert raspistill data opencv processing. code: select all def capture(settings, width, height): command = "raspistill %s -w %s -h %s -t 200 -e bmp -n -o -" % (settings, width, height) imagedata = stringio.stringio() imagedata.write(subprocess.check_output(command, shell=true)) imagedata.seek(0) im = image.open(imagedata) buffer = im.load() imagedata.close() return im,buffer code: select all image1, buffer1 = capture(camerasettings, testwidth, testheight) cv2.imshow('image',image1) want use different opencv processing techniques, before need know doing wrong. bests svato raspberrypi
Read more

datso and removing imagetitle - Joomla! Forum - community, help and support

-
hello everybody i have installed datso v. 1.3.8 , remove imagetitles http://www.galleri-kbh.dk/index.php?opt ... ry&catid=2 on datsos  homepage there no names, can't find function in parameters in administration?? http://www.datso.fr/datsogallery/viewcategory/2.html can me. vh jan found way it  :d delete line 307 "$tle = ereg_replace('"', '', $row1->imgtitle);" in file components/com_datsogallery/datsogallery.php Board index Joomla! Older Version Support Joomla! 1.0 Extensions - 1.0.x Components
Read more