RC filters and analog signal filtering

A thorough introduction to RC lowpass and highpass filters, done without summoning the ghost of Pierre-Simon Laplace.

Writing a basic Linux device driver when you know nothing about Linux drivers or USB

The VTech Socratic Method

Initial technical exploration of the VTech Socrates line of Z80-based educational home computers. A composite video modification board is developed.

Brushing Up on Hardware Hacking Part 1 - PiFex Configuration

With this post we provide an introduction to a three part series on hardware hacking and how to use a Raspberry Pi as a hardware hacking multitool. This post covers how to configure the Raspberry Pi and describes the first target that we will be using for the series

Demystifying the #! (shebang): Kernel Adventures

Clarifying the shebang (#!) mechanism: A step-by-step look using strace and kernel code shows how Linux handles script execution directly, revealing the shell isn't involved initially.

Print your own USB connector

A weblog about technology including Arduino, Raspberry, Attiny, 3D printing, Electronics, tinkering and all kinds of diy projects.

An FPGA-based LGP-30 Replica · e-basteln

A pocket-sized, FPGA-based replica of the LGP-30 computer

Just Barely Fitting a Full Wi-Fi Stack on the nRF9151

In my last post on the Nordic Semiconductor Thingy:91 X IoT prototyping platform, I outlined the features and architecture of the device. The combination of wireless protocols on the Thingy:91 X (Bluetooth LE, LTE-M, Wi-Fi) make it a compelling foundation for a wide variety of applications. However, there are a few intricacies to the protocol support. Namely, the primary stated purpose of the Wi-Fi support is for network-based positioning (i.e. scan for local access points, send them to a server, get approximate location back).