Magnets

You're correct, it seems the 5v input doesn't actually do anything, you need to drive the 3.3v input to get the backlight

I bought the same LCD but how do you know how to connect the pins? Is there a wiring guide anywhere?

The large "Quote" bar in every post is a bit annoying

On the ultra low end you can get a pogoplug v4, and if you get the pink version it has 2xUSB 3.0, 1xUSB2, SD slot, gigabit ethernet and a sata slot. They also come with a 12v/2A power supply and you don't have to buy a case. They have pretty crappy performance compared to the newer boards and do run hot. https://linuxengineering.wordpress.com/2014/08/03/performance-tuning-with-pogoplug-v4/ You can pick them up on ebay for next to nothing, especially in the US

You need to run it as root. Not sure if there's a better way around it though

You're right, I edited my post.

https://github.com/uboborov/ffmpeg_h264_H3 To give you some idea, I get ~24FPS encoding 1080p h264 into 1080p h264 using cedrus. I doubt you will get much improved performance because SW decode h265 will be very slow I think a raspberry pi is better for video because the openmax platform has more support and allows hw decode too.

I was curious about this so looked around and there is a lot of raspberry pi ups solutions, most run from a lipo cell and switch power source when the 5v supply fails. Most are $30+ so you may as well just buy a very cheap regular UPS This is the cheapest one I've seen: https://www.aliexpress.com/item/UGEEK-UPS-HAT-with-Battery-for-Raspberry-Pi-3-Model-B-2B-B-Raspberry-Pi-Battery/32786176030.html http://www.raspberrypiwiki.com/index.php/Raspi_UPS_HAT_Board more: https://www.modmypi.com/raspberry-pi/breakout-boards/pi-modules/ups-pico http://juice4halt.com/ a more ghetto way is find a powerbank that is able to do passthrough charging

The LM2596 modules on aliexpress all use counterfeit ICs but do work This is probably a better bet: https://www.aliexpress.com/item/DC-6-24V-12V-24v-to-5V-USB-Output-charger-step-down-Power-Module-Mini-DC/32679427711.html This guy on youtube tests the cheap buck modules, go back 6+ months https://www.youtube.com/channel/UCKs_u8kcQBQsERZhpZHU_7Q/videos beware: the really small ones with the tiny adjust potentiometers are very difficult to adjust to 5.00v and if you press on the pot it changes the voltage. Or you could get a 12v car USB adapter

Another review of that Ikea power supply: http://lygte-info.dk/review/USBpower%20Ikea%20Koppla%20UK.html

That worked, thanks

I'm trying to wake up an OPi PC using an IR remote following these instructions http://www.orangepi.org/orangepibbsen/forum.php?mod=viewthread&tid=2048&extra=page%3D1 bits 16 flags SPACE_ENC|CONST_LENGTH eps 30 aeps 100 header 9004 4560 one 532 1703 zero 532 593 ptrail 541 repeat 9015 2283 pre_data_bits 16 pre_data 0x1CE3 gap 139912 toggle_bit_mask 0x0 begin codes KEY_POWER 0x48B7 KEY_0 0x00FF KEY_5 0xA05F end codes end remote . [s_cir0] ir_used = 1 ir_rx = port:PL11<2><1><default><default> ir_power_key_code0 = 87 ir_addr_code0 = 40704 ir_power_key_code1 = 26 ir_addr_code1 = 64260 ir_power_key_code2 = 20 ir_addr_code2 = 32640 ir_power_key_code3 = 21 ir_addr_code3 = 32640 ir_power_key_code4 = 11 ir_addr_code4 = 63240 ir_power_key_code5 = 3 ir_addr_code5 = 239 ir_power_key_code6 = 159 ir_addr_code6 = 19635 ir_power_key_code7 = 10 ir_addr_code7 = 30536 ir_power_key_code8 = 69 ir_addr_code8 = 48386 ir_power_key_code9 = 77 ir_addr_code9 = 56865 ir_power_key_code10 = 24 ir_addr_code10 = 65025 ir_power_key_code11 = 87 ir_addr_code11 = 65280 ir_power_key_code12 = 77 ir_addr_code12 = 65344 ir_power_key_code13 = 0x12 ir_addr_code13 = 0xC738 [wakeup_src_para] cpu_en = 0 cpu_freq = 48 pll_ratio = 273 dram_selfresh_en = 1 dram_freq = 36 wakeup_src0 = wakeup_src_wl = port:PG10<4><default><default><0> wakeup_src_bt = port:PL03<6><default><default><0> My remote is a universal one but through trial and error I found what looks like an NEC coded setting pre_data: 0x1CE3 0001110011100011 -> 1100011100111000 0xC738 Power button: 0x48B7 0x48 01001000 -> 00010010 0x12 Any ideas?

This board looks useful but as people have already said, they should make some low end boards with gigabit ethernet. What's the point if you only have 100mbit. Does it come with the standoffs to mount it? Not sure why someone else in the thread was having problems with 100mbit, I can easily saturate it on an Opi PC writing to usb.

PNY SDXC 64GB UHS-I - rated 50MB/s Include fsync in write timing O_DIRECT feature enabled Auto Mode File size set to 102400 kB Record Size 4 kB Record Size 16 kB Record Size 512 kB Record Size 1024 kB Record Size 16384 kB Command line used: iozone -e -I -a -s 100M -r 4k -r 16k -r 512k -r 1024k -r 16384k -i 0 -i 1 -i 2 Output is in kBytes/sec Time Resolution = 0.000001 seconds. Processor cache size set to 1024 kBytes. Processor cache line size set to 32 bytes. File stride size set to 17 * record size. random random bkwd record stride kB reclen write rewrite read reread read write read rewrite read fwrite frewrite fread frer ead 102400 4 1182 1182 7421 7419 3163 1029 102400 16 2577 3512 14447 14524 8940 3230 102400 512 11793 16506 21625 21623 20965 17871 102400 1024 15319 16764 22187 22184 21804 18210 102400 16384 15889 17232 22911 22908 22886 18651

I thought that too, but it looks real to me. It has the EU model number, made in Philippines, the print quality on the card and packet are top notch And it passes h2testw

32GB sandisk ultra root@orangepipcplus:~# iozone -e -I -a -s 100M -r 4k -r 16k -r 512k -r 1024k -r 16384k -i 0 -i 1 -i 2 Iozone: Performance Test of File I/O Version $Revision: 3.429 $ Compiled for 32 bit mode. Build: linux Command line used: iozone -e -I -a -s 100M -r 4k -r 16k -r 512k -r 1024k -r 16384k -i 0 -i 1 -i 2 Output is in kBytes/sec Time Resolution = 0.000001 seconds. Processor cache size set to 1024 kBytes. Processor cache line size set to 32 bytes. File stride size set to 17 * record size. random random bkwd record stride kB reclen write rewrite read reread read write read rewrite read fwrite frewrite fread freread 102400 4 2087 3278 7660 7666 6585 2525 102400 16 2193 2680 15009 15004 14165 4382 102400 512 7311 10130 21708 21690 21675 9219 102400 1024 11290 16439 22156 22163 22137 13792 102400 16384 17462 18827 22777 22779 22776 18479

Samsung Evo 64GB microsd. Brand new, just run through crystaldiskmark and h2testw Orange pi PC Linux orangepipc 3.4.112-sun8i #10 SMP PREEMPT Sun Oct 23 16:06:55 CEST 2016 armv7l GNU/Linux root@orangepipc:~# iozone -e -I -a -s 100M -r 4k -r 16k -r 512k -r 1024k -r 16384k -i 0 -i 1 -i 2 Iozone: Performance Test of File I/O Version $Revision: 3.429 $ Compiled for 32 bit mode. Build: linux Contributors:William Norcott, Don Capps, Isom Crawford, Kirby Collins Al Slater, Scott Rhine, Mike Wisner, Ken Goss Steve Landherr, Brad Smith, Mark Kelly, Dr. Alain CYR, Randy Dunlap, Mark Montague, Dan Million, Gavin Brebner, Jean-Marc Zucconi, Jeff Blomberg, Benny Halevy, Dave Boone, Erik Habbinga, Kris Strecker, Walter Wong, Joshua Root, Fabrice Bacchella, Zhenghua Xue, Qin Li, Darren Sawyer, Vangel Bojaxhi, Ben England, Vikentsi Lapa. Run began: Mon Jan 16 22:16:47 2017 Include fsync in write timing O_DIRECT feature enabled Auto Mode File size set to 102400 kB Record Size 4 kB Record Size 16 kB Record Size 512 kB Record Size 1024 kB Record Size 16384 kB Command line used: iozone -e -I -a -s 100M -r 4k -r 16k -r 512k -r 1024k -r 16384k -i 0 -i 1 -i 2 Output is in kBytes/sec Time Resolution = 0.000001 seconds. Processor cache size set to 1024 kBytes. Processor cache line size set to 32 bytes. File stride size set to 17 * record size. random random bkwd record stride kB reclen write rewrite read reread read write read rewrite read fwrite frewrite fread frer ead 102400 4 1004 689 4453 4434 4381 839 102400 16 2827 3298 11694 11903 11507 2441 102400 512 11333 13769 21382 21393 21106 12297 102400 1024 13565 13151 22074 22067 21998 11406 102400 16384 13517 14777 22850 22838 22844 11913 iozone test complete. It seems samsung have crippled the later evos! it's showing: date: 10/2016 second run with performance governor

I'm experimenting with video transcoding but am getting problems when using vdpau to decode and the hw video encoder. Using this https://github.com/stulluk/FFmpeg-Cedrus and https://github.com/uboborov/ffmpeg_h264_H3 software decode & hw encode = 15-20FPS but high CPU usage. it can do 60FPS encoding rate with 960x540 30fps h264 source dropping the compression helps a bit too (-qp 24, default is 30) hw decode & hw encode of 1080 h264 = 1FPS, using 4k h265 as the source gives 1.5 FPS ffmpeg -hwaccel vdpau -i 1080p30.mp4 -c:v cedrus264 -c:a copy -pix_fmt nv12 out.mp4 Is the video engine designed to do transcoding?

I'm using an opi PC with a sandisk ultra 32GB micro SD. I've noticed that if you do a large write to the SD card (i.e. via samba) then the system becomes sluggish. Writing to a USB stick does not have the same effect on system performance. I tried changing the scheduler to CFQ (from noop) and it helped a lot. Has there been any testing on which scheduler is best? I assume noop performance will vary dependant on the SD controller? raspbian uses deadline as the default - https://www.raspberrypi.org/forums/viewtopic.php?f=29&t=64702 Some very good info here: https://www.thomas-krenn.com/de/wiki/Linux_I/O_Scheduler

Testing this on a oPi PC but it doesn't re-enable cores when going back to all 4 Going down to 1 core works, and back to 3, but I can't enable all 4. Corekeeper is enabled in the fex file but the script never reverts the changes to rc.local ### do NOT edit the following lines, always use h3consumption instead ### echo 0 >/sys/devices/system/cpu/cpu3/online # h3consumption

Is that a SIM card slot?

Ah thanks for clarifying that. I saw on the wiki about 4k but I think it's just confusing wording http://linux-sunxi.org/H3 You're right, the datasheet says h.264 1080p@60fps for the H3 I'm not sure about which program I can use

Can the opi zero decode anything above 1080p? I want to decode a 3MP h.264 stream (2048*1538) and re-encode it to 1080p and serve over RTSP. do I need to get an H3 for that? the wiki says http://linux-sunxi.org/H2%2B#Variants Is that HDMI specific or lack of GPU power for decoding? Will that be pushing it too much even on an OPI PC?

Have you done any testing on the Orange Pi zero? Will the peak consumption be similar to the Orange Pi PC?

What sort of power usage does this consume when running under load? I'm looking at these SBC to make a small NAS using USB memory sticks, but don't need much throughput - only 2-5MBps write speed over ethernet