Building an ESP32 Light Controller
In this post I am going to do a deep dive into the electronics design for my simulated sunrise/sunset aquarium light project. If you have not read that post, I recommend starting with that. Disclosure: JLCPCB is sponsoring my projects, but I had already been a big fan of their …
Oscilloscope Current Measurement on the Cheap
I have been spending a lot of time working on microcontroller power optimisation recently, and not having a current probe for my oscilloscope has been quite inconvenient. Working with current optimisation without a current probe is like designing a circuit without an oscilloscope – shooting in the dark. Can I …
Simulating Sunrise/Sunset For My Aquarium
Why? This is what I started with: It’s… fine, but the lighting left a lot to be desired. Lighting is not just aesthetic – those are real plants, and plants require light for photosynthesis. A lot more light than most people imagine! In a tank of this size, with plants …
Using KiCad with JLCPCB Assembly Service
TLDR: Click here. A Bit of History I remember when I first started making PCBs in ~2010, our low spec (8 mil min traces / 8 mil min spacing) 2-layer boards costed $133 for 4 copies. Special academic pricing. There were services like Sparkfun’s BatchPCB and OSH Park that were …
Designing a 13A Arduino Motor Shield
I am currently working on a tensile strength testing rig that will be detailed in a future post, but as part of that project, I need an Arduino shield that can drive a 12V/13A linear actuator. Electrically speaking, linear actuators are just DC motors. However, because I need to be …