Interesting minimal computer using TTL SSI parts. Includes VGA output.

Exploring precision GPS/GNSS with RTKLIB open source software and low-cost u-blox GPS receivers.
This particular post links to the announcement of the u-blox ZED-F9P high precision GNSS module
https://www.u-blox.com/en/product/zed-f9p-module
According to https://forum.u-blox.com/index.php/18878/when-can-i-get-a-zed-f9p
"I contacted u-blox and they said that the evaluation kits will be available at the end of Nov 2018."

The uBlox LEA-6T supports precision GPS timing for demanding positioning applications such as basestations. It features a time mode function whereby the GPS receiver assumes a stationary 3D position, whether programmed manually or determined by an initial self-survey. Stationary operation enables GPS timing with only one visible satellite and eliminates timing errors which otherwise result in positioning errors. An accuracy of up to 15 ns is achievable by using the quantization error information to compensate the granularity of the time pulse. A built-in time mark and counter unit provide precise time measurement of external event inputs

Raspberry π based notebook computer.

This is a Linux industrial I/O (IIO) subsystem driver, targeting RF Transceivers. The industrial I/O subsystem provides a unified framework for drivers for many different types of converters and sensors using a number of different physical interfaces (i2c, spi, etc). See IIO for more information.
Provides details which are useful for programming the ADALM Pluto SDR.

A Hewlett Packard Infrared Signal Decoder
Martin Hepperle
June 2015
Several Hewlett Packard pocket calculators are able to send printer output via Infra-Red (IR) signals to a small portable printer. They use an HP-specific transmission protocol which is also called “Red Eye”. This protocol is different from the better known IrDA protocol. This document gives a brief overview of the format and describes hard- and software to build a decoder system for this protocol.
This system allows receiving the “Red Eye” signals with a computer via a serial or an USB interface.

Software runs on Linux, Android, OS X, iOS and Windows.

Another muon detector, or rather instructions to build one. I learned on 2024-04-12 that the detector is sold by the UK Radio Astronomy Association:
https://www.ukraa.com/store/categories/cosmic-rays/assembled-muon-detector (£188),
https://www.ukraa.com/store/categories/cosmic-rays/muon-detector-assembled-with-enclosure (£216)

See also http://cosmicpi.org/

General discussion group about Aispy and SDR# software. This is not the customer support!

AIRSPY is suite of affordable high performance Software Defined Radio (SDR) receivers for HF/VHF/UHF bands.
http://airspy.com

Battery powered, single channel digital oscilloscope which sends its plots via bluetooth to an iOS (Android will be supported later) device for display.

   Analog Bandwidth: 20 MHz
   Sample Rate: 100M samples/second
   Sample Resolution: 8 bits
   Connectivity: Bluetooth 4.0 with 100-ft+ range
   Input Range: +/-40V
   DC Accuracy: +/- 3%
   Offset Range: +/- 40V
   Sample Memory Depth: 4k
   Input Impedance: 1MΩ || 17pF
   Input Coupling: AC/DC
   Resolution: 100 mV/division to 10 V/division
   Compatibility: IOS (Android and Windows coming soon), open source app and protocol
   All day battery life: 8+ hours depending on settings
   Dimensions: 20 mm x 30 mm x 118 mm
   Weight: 56 g