Donkey Car Controller is a mobile app designed to provide a “commandless” user experience to get started with the Donkey Car. This article gives a step-by-step guide on how you can use this app. Requirement Before you start, you need the followings: A Donkey Car with Pi 4B (Jetson Nano is…

Pi 4 is good except one thing: It consumes much more power than Pi3B+, which is definitely not good for application such as Donkey car. My experience is that my pi3b+ can run for an hour on a 1700mah LiPo battery but only 30–40 mins (max) on a pi4. Raspberry…

9/1/2020 更新: 根據前幾天的 Governance Poll, 現時 DSR 已由4%升至6% 隨著 MakerDAO 成功將 SAI 升級至 DAI 後，由 Maker 開發的 Oasis App 也正式投入服務。Oasis App 提供存款，借貨及交易服務。或許你之前已經聽過 DAI 可以透過 Compound 來賺取利息，那麼親生兒 …

Install the video 4 linux utils sudo apt-get install v4l-utils Run the command v4l2-ctl to check the device. It should show this output. jetbot@jetbot:~$ v4l2-ctl --list-devices vi-output, imx219 6-0010 (platform:54080000.vi:0): /dev/video0 Further check using v4l2-ctl. This command must be run on a local terminal (not a remote terminal via SSH)…

Today I am running my colab notebook to train the model for donkey car and notice that the default tensorflow runtime has been upgraded to tensorflow 1.15.0. I actually don’t care about it until I run the model on donkey car and the following error happen loading model models/tub3.h5 Traceback (most…

2021年5月更新: 估唔到去到 2021 年都咁多人睇呢篇 2019 寫既文。Crypto 世界好多野都變左，呢篇文亦顯得有少少 outdate。你睇完呢篇文有興趣就去 subscribe 我岩岩開既 Facebook 同 Patreon啦，我會分享多少少有關 crypto 既操作…賣廣告完畢 先旨聲明: 我唔係專家，只係講出過去用大量時間研究後既 …

1. Make sure you have a steady power supply Coral draws significant amount of energy from the Pi USB 3 interface. If you are experiencing under voltage, the pi will be throttled Use this handy one-liner to check the status. vcgencmd version; vcgencmd get_throttled; vcgencmd measure_volts; vcgencmd measure_temp;vcgencmd measure_clock arm; You can also stress test your Pi to see…

Update: If you can’t find the model trained by colab, read this article to solve version issue. One of the most time consuming task after you built the Donkey car must be training the model. It could easily take you 30 minutes or more if you don’t have a GPU…

Update: If you are using newer Jetson software, note that you might need to use a newer isp profile. I haven’t verified it yet so please give it a shot and let me know. Thanks Ville Saukkonen for mentioning this to me. A lot of people are very interested in…