This is a little sun powered board with ultra low power consumption and zero maintenance. It measures temperature, humidity, pressure and sends it every 15 minutes with a RF module. The small solar panel (8 x 6 cms) harvest energy to charge two small and cheap super capacitors of 5F each. It can run alone almost forever, at least until the caps die. But supercapacitors have a much longer lifespan than batteries. It can survive without sun about 80 hours, more than 3 days! I tested it with the solar panel disconnected. This is also environmental friendly as it produces it's own energy and don't use batteries with it's 'dangerous good regulations' (DGR) for handling, disposing, etc.
It seems like this project would be a good way to learn about using supercaps to run things.
TOOOL's overview of lockpick laws in the United States.
A dump of the CIA World Factbook, converted into a series of JSON documents. Updated automatically every Thursday.
Liquid is a template language created by Shopify. It's available as an open source project on GitHub, and is used by many different software projects and companies.
This reference documents the Liquid tags, filters, and objects that you can use to build Shopify Themes.
Of course, this applies to anything else that uses Liquid as its templating language.
PCBway community page for an adapter for a Commodore 1541-series disk drive. Makes it possible to add a parallel interface port to the drive for the purposes of disk ripping. Rather than cutting traces and soldering directly to a 6522 chip, it fits in between the chip and its socket. Add some ribbon cable and a DB-15 plug and there you go.
The picture is a helpful reference for how the IC socket and header bars are positioned.
Note that, per the response to my question:
Pins 9 and 10 are connected to pins 18 and 39 of 6522 - CB0 and CA1 (some count it from 1 so it's CB1 and CA2 then). They are needed only when drive is connected with C64 via userport to handshake while sending data. You don't need those for XUM1541/ZoomFloppy.
Radiopaedia is a rapidly growing open-edit educational radiology resource that has been primarily compiled by radiologists and radiology trainees from across the world. Our mission is to create the best radiology reference, and to make it available for free, forever.
The contents of this site will change over time as new additions and revisions are made to further expand upon the full breadth of Gender Dysphoria. In its current iteration it is severely lacking in non-binary, agender & genderfluid specific dysphoria, as well as Third Gender and Two-Spirit narratives. The GDB is an open source and publicly funded project, contributions are extremely welcome.
Translated into English, Chinese, and German.
Github: https://github.com/GenderDysphoria/GenderDysphoria.fyi
The Pinouts Book is a free digital book created for designers and engineers as a quick reference for remembering the different pinout functions in your electronics projects.
The book covers 130 commonly used components (view list), such as connectors, single board computers, dev boards, memory cards, microcontroller chips, and more.
If you need more technical information, each page has a link at the top (e.g. pinouts.org/XXX), and these redirect to official datasheets / specifications.
We’re going to be updating the book as time goes on, and we hope you find it useful.
Microfarad [µF] Nanofarad [nF]
- 0.01 µF 10 nF
- 0.1 µF 100 nF
- 1 µF 1000 nF
- 2 µF 2000 nF
- 3 µF 3000 nF
- 5 µF 5000 nF
- 10 µF 10000 nF
- 20 µF 20000 nF
- 50 µF 50000 nF
- 100 µF 100000 nF
- 1000 µF 1000000 nF
How to Convert Microfarads to Nanofarads:
- 1 µF = 1000 nF
- 1 nF = 0.001 µF
This work-in-progress is a comprehensive quotation-based dictionary of the language of science fiction. The HD/SF is an offshoot of a project begun by the Oxford English Dictionary (though it is no longer formally affiliated with it). It is edited by Jesse Sheidlower.
Someone built a list of all of Pelican's configuration settings and variables, and what they mean. Useful as a reference to the templating language.
WorldTimeAPI is a simple web service which returns the local-time for a given timezone as either JSON or plain-text. Some additional information is provided, such as whether that timezone is currently in Daylight Savings Time, when DST starts and ends, the UTC offset, etc. Does not require an account or API key. Free.
Program made with Pygame for visualizing sorting algorithms. Has a collection of implemented sorting algorithms which are useful to refer to, if nothing else.
WikiMatrix helps you compare the features of different Wikis in a comfortable side-by-side table. Select the Wikis you're interested in below and click the compare button.
Not sure where to start?
Let the Choice Wizard guide you through a few questions to narrow down the available Wikis to your needs.
Try the Search and configure the specific features you require in a Wiki.
A cheatsheet for Python, which goes into quite a few of the commonly googled minutia nobody can remember. Can be read online (it's Markdown).
This GPIO Pinout is designed to be both a quick and interactive reference to the Raspberry Pi GPIO pins, plus a comprehensive guide to your Raspberry Pi's GPIO interfaces. It also includes dozens of pinouts for Raspberry Pi add-on boards, HATs and pHATs.
MusicBrainz is an open music encyclopedia that collects music metadata and makes it available to the public.
A curated list of awesome HTML5 resources. Multimedia applications, elements, APIs, crypto, and other stuff. Probably single page applications, too.