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 thepihut.com
HC-SR04 Ultrasonic Range Sensor on the Raspberry Pi | The Pi Hut
| | blog.cavelab.dev
Raspberry Pi security alarm - the basics :: Cavelab blog - Stories from the Cavelab
12.0 parsecs away

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| | In November last year - I started building a DIY security alarm system, using a Raspberry Pi as the controller. My plan was to make a self-sustained system, using proper alarm hardware - like PIR sensors and sirens. Integration with Home Assistant would be an add-on, not a requirement. I wanted the system to be as redundant and fault-tolerant as I could make it. This is a pretty long story, with some twists and turns - let's get into it
| | www.doctormonk.com
Dr. Monk's DIY Electronics Blog: Lies, Damn Lies and Analog Inputs (comparing ADCs on ESP32, Pico and Arduino)
14.5 parsecs away

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| | After some inconsistent and unreliable results reading an analog input from an ESP32 board, I decided to get all scientific and do some expe...
| | projects.drogon.net
The GPIO utility | Gordons Projects
15.9 parsecs away

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| | Command line utility to manipulate the Raspberry Pi's GPIO pins.
| | jborza.com
My First Altera FPGA | Juraj's Blog
40.9 parsecs away

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| Over a month ago I bought an Altera Cyclone IV board from a local seller, it seems to be listed on Aliexpress as well. It's marked as A-C4E6E10, and features: Altera Cyclone IV EP4CE6E22C8 FPGA chip with 6272 logic elements, 270 Kbits of memory 8-digit seven-segment LCD display 8 position DIP switch VGA output PS/2 input port (comes in handy to try out keyboard processing) buzzer a couple of push buttons a handful of IO pins, some of which can be used as a connector for a 1602/12864 display and 22 miscellaneous pins CH340 USB to serial chip 1602 display has 2 lines of 16 characters, each 5x8 pixels 12864 dot matrix display has a resolution of 128x64 pixels, hence the name