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Free Stuff - August 2022
The August recipient for the Great Scott Gadgets Free Stuff Program is Trevor! Trevor is working on a project called Hack365 where he is attempting to blog about one hack (or make or break or fix or learn) each day until next DEF CON. We are excited by how enthusiastic Trevor is about documentation, sharing his experiences with the community, and learning new things. One of the projects Trevor plans to take on is learning about his ceiling fan’s RF receiver, which is an excellent place to start when you are learning about RF. Trevor plans to share his progress...
Новый одноплатник StarFive VisionFive 2 на 4-х ядерном RISC-V процессоре всего за $46
Совсем недавно программировали на Python и устанавливали Docker для Sipeed Lichee RV RISC-V. Модуль Lichee RV стал первым массовым дешевым решением на процессоре RISC-V с возможностью запуска Linux. Развитие архитектуры не стоит на месте, так компания StarFive, разработчик RISC-V процессоров, представила новый 4-х ядерный процессор RISC-V JH7110 с графическим ускорителем. Предыдущие процессоры, построенные на RISC-V ядрах, например Allwinner D1 (используется в модуле Sipeed Lichee RV), не содержат GPU, а значит, не позволяют запускать 3D приложения и игры. На новом одноплатном компьютере VisionFive 2 на процессоре RISC-V JH7110 с 3D GPU, размещено 8 ГБ ОЗУ, интерфейсы HDMI 2.0 и MIPI DSI,...
Dual Voltmeter for RV Electrical Systems
This post was written by Brent, one of Crystalfontz’s engineers.
Brent’s Voltmeter BuildI have an RV that has both a vehicle electrical system and a camper electrical system. I wanted a way to see the voltages of both systems at a glance while driving.
I tried some cheesey voltmeters from e-bay and some other cheesey voltmeters from Amazon but I was not happy with the accuracy or stability. I was not able to find a meter that would work well in a vehicle, show two voltages, and have good accuracy.
Time to make my own:
https://invidious.privacyredirect.com/watch?v=lGkzsqYgikEVideo can’t be loaded because JavaScript is disabled: Dual...August update: RISC and reward
This month we take a close look at the Star64, check out PineBuds (Pro) progress and discuss the Pinecil V2. I also come bearing good news concerning the PinePhone Pro, which has seen a small but significant hardware redesign and some important software updates.
A response to Martijn's blog
We rarely, if ever, make responses to blog posts or articles. In fact, there is only one instance that I can think of when we did so. So then, somewhat uncharacteristically, this is a response post to Martijn Braam’s blog in which he explains why he left the PINE64 community.
Does the WS2812 have integrated Gamma-Correction?
A while ago, I used transient current analysis to understand the behavior of the WS2812 a bit better (and to play around with my new oscilloscope). One intersting finding was that the translation of the 8 bit input value for the PWM register is mapped in a nonlinear way to the output duty cycle. This behavior is not documented in the data sheet or anywhere else. Reason enough to revisit this topic.
Measured PWM duty cycle vs. set value for WS2812SThe table and plot above show PWM pulse length of a WS2812S in dependence of the programmed 8 bit PWM set...
GreatFet Feature on Hackaday
Back in 2019 over on Hackaday, Mike Szczys wrote a piece called “Hands-On: GreatFET is an Embedded Tool That Does it All”. This article covers:
a review of the GreatFET One hardware, our matching GreatFET One sticker, the wiggler, a test run of GreatFET One and an I2C OLED display, Facedancer and USB emulation, and how to do a quick recovery using DFU.We hope you check it out!
Yamaha C1 IDE Adapter
The Lo-tech C1 Music Computer IDE Adapter brings new life to the much-loved Yamaha C1.
Free Stuff - July 2022
The July recipient for the Great Scott Gadgets Free Stuff Program is Manoj Kumar Mondal from India! Manoj requested a HackRF so he could take some security courses at his university; having a HackRF is a pre-requisite for the course. We look forward to hearing from Manoj as he progresses through the course!
Программирование на Python и установка Docker для Sipeed Lichee RV RISC-V
В первой части познакомились с процессором Allwinner D1 на RISC-V архитектуре, рассмотрели возможности, поработали с одноплатным компьютером Sipeed Lichee RV. Старый образ операционной системы содержал многие недоработки, которые не позволяли полностью оценить работу одноплатника. В продолжение рассмотрения Lichee RV, возьмем новый образ Ubuntu, построенный на последнем ядре Linux 5.19, окончательный выпуск которого ожидается в конце июля 2022 года. Поработаем с GPIO из Python`а и установим Docker. Теперь полноценно протестируем новый образ, проверим на что способна плата и начнем уже программировать на Python.
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