Questions tagged [sbc]
SBC stands for single board computer. It is a complete computer on a single PCB, including processor/microcontroller, I/O and other features.
57 questions
1 vote
1 answer
158 views
10 Layer impedance control PCB stackup for custom SBC
I'm designing a custom SBC using the TI Sitara AM6254 SoC, which includes several high-speed interfaces like DDR4, RGMII, USB,HDMI,LVDS,CSI and PCIe. The official SK-AM62B-P1 development board from TI ...
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1 vote
1 answer
149 views
Parallel NPN BC547 for increase current demand of PWM controlled fan
My fan requirement is 180mA while the transistors I have has a maximum collector current rating of 100mA, thus, I resorted to using a parallel arrangement as shown. I have done some calculations &...
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1 vote
0 answers
228 views
Pi5 with Automotive Power and Graceful Shutdown - Open Source Schematic
I am implementing Pi5 in an automotive environment and was surprised to find limited development on this topic, even with my specific requirements, which I thought were relatively basic: Pi needs to ...
- 11
0 votes
1 answer
121 views
x1 relay activates but 2nd not clicking in a 5V x2 relay board
I am having a problem with this setup. The DC side relay#2 is perfectly working in NO condition. It gets activated when I send signal thereby charging Li battery via TP4056. However, AC side relay#1 ...
- 229
0 votes
3 answers
100 views
Modding a 5 V relay module to work with a Raspberry / Orange Pi
This video exhibits a hack to make a 5 V relay module work with under-powered trigger signal from single-board computer like a Rapsbperry Pi. He adds a potentiometer at the base of the transistor in ...
- 229
0 votes
0 answers
85 views
Converting LVDS Display Output to RGB for AM625 SBC
I recently purchased an SBC board based on the AM625 processor, which provides display output in LVDS format. However, I do not have an LVDS display. I want to design a custom PCB to convert the LVDS ...
- 153
7 votes
2 answers
150 views
Issue with Ethernet Failing on Embedded Linux SBCs Below 0°C
I'm experiencing an issue with some of my embedded Linux SBCs. About 10% of them fail when they are operating below 0°C and are rebooted. The problem seems to be growing over time. Specifically, the ...
- 517
0 votes
2 answers
2k views
How can I wire up a USB-C connector for 12v (4A) of fixed voltage
I have an SBC (Radxa Rock 5B) that accepts PD as power supply, but it's buggy and often too slow to negotiate a voltage before the power supply cuts and we end up in a boot loop. But, it can also ...
- 123
0 votes
1 answer
90 views
Auto switch power source for RPi Pico type board
I'm developing a MIDI controller around a RPi Pico type board (docs here), which doesn't support simultaneous powering through USB and a separate supply. VBUS and VSYS are outputs if powered by USB ...
- 417
0 votes
1 answer
124 views
Continuous rotation servo with software PWM not working as expected
I have a continuous rotation SG90. I am trying to implement software PWM (because the orangepi sbc I am using doesn't support hardware PWM yet). I got a bunch of electronics from a friend so I don't ...
- 167
0 votes
0 answers
285 views
Connecting mini USB VCC and GND to a power supply, and D+/D- to a SBC's USB headers
I have USB powered device (rtl-sdr dongle) with a mini-USB port, that I want to connect a single board computer (BalenaFin). The SBC has regular USB ports and a 4 pins USB 2.0 headers on it: A ...
- 143
-1 votes
1 answer
494 views
Allwinner V3s boot conditions
We've made our own SBC as part of a student project based on the Allwinner V3s, but it's not booting (no output on UART0, and it doesn't enter USB device mode (FEL) either). What are all of the ...
- 1
0 votes
0 answers
54 views
In order to program a SBC is it necessary to learn the complete Linux?
I want to build applications and GUI's in SBC's. Since almost all SBC's run on Linux OS. for me as a programmer, is it necessary to learn complete linux and kernal of that SOC/SBC? or with application ...
- 101
1 vote
5 answers
416 views
What are technical challenges of implementing DRAM memory modules on SBC like Raspberry PI?
I'm surprised to see no Single-Board Computer including Raspberry PI has memory modules for allow for flexible amount of memory (e.g. this review). And I have not found such discussions via web search,...
- 275
0 votes
1 answer
154 views
Why SBC contain EEPROM?
I have nanopc t2 SBC, its software is open source. However, it has an EEPROM. Why? Do they put some confidential information on it? What if I plan to redesign that board, will I need the contents of ...
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