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Managing Overwhelm
Log from DIY Truck Camper
Overwhelm is something I struggle with regularly. I always have. It's something I need to actively manage to avoid stalling out on projects. This camper project is the design and building of a very specialized home, on a small scale. The small scale...

#buildinstructions for hardware: solar charging circuit
Log from Elephant AI
So for this we need wires, connectors for the battery, a lead acid battery, a charge controller, and a solar panel! WHICH BATTERY AND SOLAR PANEL SHOULD YOU USE? From an earlier log, I investigated how to calculate the type of solar panel and battery...

#2 - The Modules - IOAPEX
Log from MAD - Modular Audio Devices
The IOAPEX module is a port expander that provides control of up to 256 digital inputs (e.g. buttons), 256 digital outputs (e.g. LEDs), 256 analog inputs (e.g. potentiometers, FSRs), and maybe 16 CV/gate signals. One CPLD to rule them allIOAPEX is an...

Design considerations
Log from PROMer
(moved from the project description page) Since I want to program both 74187 and 74188, I need 8 bits of input and 8 bits of output. I started with my favourite parts: a couple of hexadecimal encoding wheels and a couple of TIL311 for the address bus....

Prototype
Log from Nixie Tube Power Supply
After I had spent a month or so messing with LTSpice, I decided that I really needed to build something to try it out. From what I had read, trying to prototype this power supply using a breadboard would not be a good idea. Breadboards have too...

Designing and simulating the final version
Log from Gamma PIN - Semiconductor Radiation Detector
After a long time spend testing and thinking about the right solution to all the problems, I have made multiple alterations to the current prototype. Some of them require a different design, so the new board including these signal processing units should...

Datapath: circle more, bus less
Log from SIFP - Single Instruction Format Processor
CPU internal data paths come in many topologies and complexities - from simple bidirectional bus all the way to n*m matrix switches and everything in between. SIFC16 datapath mostly resembles a circle, in the sense that outputs of all registers end up...

Project Introduction
Log from $1 Laser Interferometer
I started this project only a week or so ago, after seeing this video about the concept. I started designing a circuit to replicate the one in the video, using a transimpedance amplifier to process the signal and maybe another op amp to amplify the signal...

Reverse Engineering the Screen
Log from Bistable LCD e-Paper eReader
Origin I first saw this screen on the ZBD EPOP 900 electronic shelf label (ESL). Thought it is going to be fun just reverse engineer them, so I bought a few of them: PCB After I got them, the first thing I tried was powering them up. And... I got nothing....

Step 8. Tesla Coil & UV Lamp
Log from UV Sanitizing Autonomous Robot
Tesla Coil A Tesla coil is an electrical resonant transformer circuit designed by inventor Nikola Tesla in 1891. It is used to produce high-voltage, low-current, high frequency alternating-current electricity. Tesla experimented with a number...

Project Log 10: Awesome, a 3D mouse!
Log from OS3M Mouse
Some of you might be wondering, if I had MVP 5 months ago... what happened to the OS3M mouse? And I'll tell you - my life got busy! Work on the project stalled for a few months following the last update. I reached a point where I knew a hardware revision...

2. Getting Started
Log from Homemade Spectrometer
In this chapter I will show you the main features of Raspberry Pi 3B+, Qwiic pHAT module and AS7262 sensor. Also we learn how to setup the Raspberry Pi and how to detect the peripheral of the sensor. Raspberry Pi 3B+ The Raspberry Pi 3 B+ provides you...

Exploring the bootloader
Log from Manhattan SX - Hacking a low cost DVB-S2 receiver
From the U-boot shell prompt we can explore the command options available to us using the help command. There is a lot for us to explore: kiwi# help ? - alias for 'help' CmdPerformanceTest- gettime - Get the system executing time ac - set a...

TIG Foot Pedal for the Weldinger WE 200P ACDC
Log from Adding a Foot Pedal to a hobby grade TIG Welder
DISCLAIMER: First things first - I am not a professional electrician. Anybody who decides to modify his/her TIG welder the way I did (or in a similar manner) does so at his/her own risk. There surely is a risk of electrical shock and (possibly fatal)...

Hack Chat Transcript, Part 3
Log from Low-Level Analog Measurement Hack Chat
Chris Gammell12:42 PMI'm sure you have some you could share as well Paul Stoffregen12:42 PMhow much calibration sucks really depends on your production volume and how willing you are to invest the time & money to make it not suck Chris Gammell12:42 PM>...

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