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"Why worry? Each of us is wearing an unlicensed nuclear accelerator on his back." -- or, on The Independent Design and Production of a Functional-In-Universe Proton Pack
Log from "Ghostbusters" Indie Proton Pack Build
Right, so a Proton Pack functions, basically, by generating a highly-energetic, directional stream of intense, charged alpha radiation -- i.e., high-energy protons at high speed.If a cyclotron isn't a reasonable possibility, well, what is?Let's break...

Adding power storage
Log from Low cost solar panel solution (MPPT + sun tracker)
What would be a solar system without a battery ? A power bank is especially helpful if you hope to use solar energy when there’s no sun: illuminating a campsite at nighttime, charging your phone when raining, or keeping your laptop running on a cloudy...

Schematic Overview
Log from SMD Reflow Hotplate
School’s been fairly busy over the past bit so I haven’t had much of a chance to add any posts here. In this log, I’m going to dump a basic overview for the various sheets of the SMD reflow hotplate project. This board is the controller board, it will...

Updated Gray Counter
Log from YGREC8
20200814 : back to 6 bits because it looks unlikely I'll use 16 byte-long messages. Look at this circuit :-)Total count : 39 gates :-)The rest of this log is still very informative. With the new TAP v.2, I reconsider the detailed design of the whole...

Our Schizophrenia project
Log from Empathy squad
April, 9th Today we chose which SDGs we wanted our project to be based on and it will be about "Good health and well being", "Reduce inequalities" and "Peace, justice and strong institutions". Then we thought of all the different types of doable experiences...

Testing the 14500 HAT-like UPS supply with high current demands
Log from Single-cell Li-Ion Powered UPS for Raspberry Pi
First of all, let me clarify that with normal 14500 cells in general, a heavily loaded (with attached USB devices) or tasked (running all cores to the max) Raspberry Pi Model 3 will not run for long on these cells, if at all. Regardless of the capacity...

Design Considerations
Log from U1LiUPSRPi
This is a distillation of the thought process involved with putting this UPS together. There are always compromises to be made. I will go through the trade-offs involved with this design -- section by section. It's a bit long-winded, but I found it is...

Fried Green LEDs
Log from Bullet Movies
I knew it would happen at some point. I killed some 30x30 mil LED chips in this stock 10W green package. The remaining good ones still light off DC: Actually two others in the left string also appear at higher currents; before the "event," they all had...

New Blackbody Radiator and Lepton Accuracy testing
Log from Lepton 3.5 Thermal Imaging Camera
Trawling eBay netted a reasonably inexpensive Accuthermo FC100D TEC (Peltier thermo-electric cooler) controller mounted in an enclosure from Wells-CTI with a 12VDC 8A power supply and TEC H-bridge driver. The FC100D uses PWM and bi-directional...

03 – cutting costs
Log from Universal undervoltage lockout up to 34V input
What is the aim? This log is all about: How can we make the whole board cheaper while keeping all the features and not killing its safety functions. This all refers to the early v0.2 version which is by no means optimized yet! Ways to cut costs I try...

Motor Control and Current Measurements work very well.
Log from Open Concentrating PV Solar Tracker Controller
Motor controller and current measurement This will be a long log, so I want to summarize: The motor controller of the “single board” works as expected and we can get a current measurement which is good enough to detect blocked or damaged...

Clock application pcb
Log from 1 Square Inch TTL CPU
CPU demo: CLOCK Since yesterday, the clock application is fully working. It includes button functions for setting the clock to the current time. The browser based Javascript assembler was updated again, it will now show today's clock source...

Revision 2
Log from TRIAC Based Transfer Switch
My first log ended with the word simple; scratch that. After a few rounds of refinement and some in-circuit validation many changes have been made. Before getting to that here are some of the challenges that make this seemingly simple idea...

Power Supply Issues
Log from GPS Driven Clock
This clock has been operating just fine for the last 11 months until about a week ago. We had a power outage due to an electrical storm. When the power shut down, it oscillated on and off rapidly for about 30 seconds. Apparently, this fried the buck...

Spent more time making new parts, than upgrading the machine
Log from Grizzly G0704 CNC Conversion
More of a blog entry than a project one.Sort of a milestone this weekend, we actually spent time making parts for a robot we're trying to get ready before the end of the month. For a short while it was even like a normal CNC shop where we are popping...