John Oliva - Oliva Labs

Oliva Labs

John Oliva

Rebooting (Again)

Rebooting (Again)

It has been a long time since this blog was updated and in fact the original content was lost - again. The difference this time is AI and the Wayback Machine. Using a Hermes agent I was able to get a new version of Ghost installed on my server and then

Watch Escapement Desk Toy, Part 2

Watch Escapement Desk Toy, Part 2

Part 2 - Fabrication. The Watch Escapement Desk Toy is comprised of three sub-assemblies: - Mainspring - Gear Train - Balance As mentioned in Part 1 of this series, this design and the 3D printable STL files may be found on Thingiverse. All of the plastic parts were printed using PLA plastic on

Watch Escapement Desk Toy

Watch Escapement Desk Toy

Part 1 - Inspiration I am a fan of the kinetic sculptures produced by David C. Roy. David produces beautiful wood kinetic sculptures with most of them powered by a watch escapement type of device as a motion power source. I am planning on creating some modest kinetic sculptures and would

Docker based PigPIO Daemon

Docker based PigPIO Daemon

Originally shared via Github in 2018. Docker based pigpio daemon running in a Python3 environment on Raspberry Pi. This is part of the custom firmware used for my Donkey Car. From the pigpio library webpage: pigpio is a library for the Raspberry which allows control of the General Purpose Input

MySensor Slim Enclosure

MySensor Slim Enclosure

Originally shared via Github and Thingiverse in 2019. Summary Sensor housing for MySensor slim sensor module. Shown as a contact sensor but can be used for other sensors as well. Designed using OpenSCAD 2018.03.17. Incorporates the following third-party libraries: * Belfry OpenScad Library, https://github.com/revarbat/BOSL

Raspi-Zero MySensor Gateway

Raspi-Zero MySensor Gateway

Originally shared via Github and Thingiverse in 2019. Summary Raspberry Pi Zero W based MySensor controller/gateway with Long Range NRF24L01 + PA + LNA RF Transceiver. [Archived image unavailable: Image not preserved in the Wayback archive] [Archived image unavailable: Image not preserved in the Wayback archive] [Archived image unavailable: Image not

Adaptive AI for Javascript

Adaptive AI for Javascript

Originally shared via Github in 2013. Javascript port of C++ Adaptive AI library into a Common.JS module. Adaptive AI is a library for implementing adaptive/statistical finite state machines (ASFSM). joliva/adaptive-ai-jsJavascript port of Adaptive AI library into a Common.JS module. Adaptive AI is a library

Genoscope

Originally posted to Hackaday for their Circuit Sculpture Contest in January 2019. This art-tech sculpture was inspired by the shape of the DNA molecule. As can be seen in the lead image, the sculpture is a single helix of AWG8 copper wire with AWG20 copper & brass rungs with

3D Printed Sensor Enclosure

3D Printed Sensor Enclosure

This is a presentation I originally delivered to a 3D printing meetup group in August 2017.

OpenSCAD Tutorial

OpenSCAD Tutorial

This is a presentation I originally delivered to a 3D printing meetup group in February 2017.

PETG for 3D Printing

PETG for 3D Printing

This is a presentation originally delivered to a 3D printing meetup group in November 2016.

Rebooting

It has been a long time since this blog was updated and in fact the original content was lost. Therefore, I have updated to the latest version of Ghost and am starting anew. This blog will mainly serve as a personal journal of experiments and adventures with technology and science

Docker based PWM Manager

Docker based PWM Manager

Originally shared via Github in 2018. Provides access to Raspberry Pi GPIO servo PWM routers via REST API. Runs as a Docker container on a Donkey Car and allows a custom version of the Donkey Car software to select whether the servo PWM signals driving the throttle and steering come

Solar Pebble Watchface

Solar Pebble Watchface

Originally shared via Github in 2014. Pebble Watchface displaying date and time as orbits. * The outer number ring shows the month. * The center number shows the day. * The outer circle shows the hour. * The inner circle shows the minute and second. joliva/solarPebble Watchface displaying date and time as orbits.

TiShadow for Titanium Development - Part 4

TiShadow for Titanium Development - Part 4

In Part 3 of this series on TiShadow, we covered TiShadow’s support for native modules and appified apps. In this post we will look at TiShadow’s support for Behavior-driven Development (BDD) using Jasmine and some debugging techniques. Behavior-driven Development with Jasmine TiShadow embeds the Jasmine BDD