1wire Dallas DS18B20 High Temperature error 127 - Raspberry Pi Forums

-

hi had post in case others have same problem. searched days on net found nothing. here goes:

have 6 of these temp senders attached single 1 wire pin on pi. i'm boiling water make distilled. work ok @ temps under 50 degrees c. :d

found through trial , error whenever temp raised above 50, reading 127.937. :( when temp fell, start reading below 50. :? when reading other 127, temps right (i checked hand held ir thermometer).

problem? checked resistor, 4k7, specified, has installed separate 1k0 resistor drop voltage led. had wired wrong, , voltage across temp sensors (when worked out left check) 3.0 volts, not 3.3 being supplied pi. :oops:

shorting on 1k resistor raised voltage, , presto!, douglas adams said, add nice fresh cup of tea, , ~98c! :lol:

doubt stupid me, but, if reading this, might you. :roll:



raspberrypi



Comments

Post a Comment

Popular posts from this blog

VIDIOC_S_FMT error 16, Device or resource busy - Raspberry Pi Forums

-
dear all, working on image processing using raspberry pi, have installed intex usb web camera on raspberry pi. have used basic python script of image processing https://www.cl.cam.ac.uk/projects/raspb ... first.html required libraries installed on raspberry pi. script code: import imgproc imgproc import * # open webcam take pictures camera = camera(160, 120) # open viewer window display images viewer = viewer(160, 120, "the first step") # take picture camera img = camera.grabimage() # display image in viewer viewer.displayimage(img) # iterate on each pixel in image x in range(0, img.width): for y in range(0, img.height): # value @ xth column , yth row, place intensities variables red, green, blue = img[x, y] # test find colour dominant if red > green , red > blue: # red dominant, set pixel red img[x, y] = 255, 0, 0 elif green > red , green > blue: img[x, y] = 0, 255, 0 else: # if red or gr
Read more

using a laptop skeleton to build a pi laptop - Raspberry Pi Forums

-
Image
i have laptop dead motherboard . can remove components laptop , in anyway possible connect raspberry pi inbuilt display , keyboard on laptop ? (and touchpad if possible). (i figured remove components inside , fix pie inside , use extended usb cable , connect available usb ports respective holes in laptop skeleton, same headphone out ) . i'm noob when comes pi . on topic appreciated if screen lvds type may possible use screen installing converter board. this: http://www.ebay.com/itm/hdmi-dvi-vga-dr ... 3027&rt=nc need model number of screen , ask seller if work. or search ebay using brand , model number. assuming screen in working order..... back-light not burnt out etc.. other devices...... can used if have usb interface not part of motherboard. have make connector. raspberrypi
Read more

Forum for Joomla? - Joomla! Forum - community, help and support

-
heya, i need forum joomla works community builder , not joomlaboard. im using jb right now, , not working me >< what other *proper* installations there available? i recommend smf, that's forum using here, see link on bottom of page. there's called smf/joomla "bridge" available, see http://extensions.joomla.org/component/ ... itemid,35/ Board index Joomla! Older Version Support Joomla! 1.0 Extensions - 1.0.x Components
Read more