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Hack Chat Transcript, Part 1
Log from Heavy Engineering Hack Chat
Dan Maloney12:00 PMHello everyone, welcome to the Hack Chat! I'm Dan, I'll be moderating today along with Dusan as we welcome Andy Oliver. We're going to be talking about Heavy Engineering, which I'm really looking forward to. Hi Andy, are you online...

Why Make This?
Log from FreqCounter
A few people previously have wondered why I'm going through all this hassle when there're plenty of cheap ATMEGA or PIC-based frequency counter projects around. The answer is, simply, that all of those solutions aren't very good when you're looking...

Plans need work
Log from 7" LCD Nametag
Here's an incomplete schematic:No switching power stuff on there, but right now I'm more concerned about the PIC and interfaces between SRAM and LCD. Needs some figuring out how to do still.A couple tips for producivity: MPLAB Harmony (and the Configurator...

New Light Day: RGB LED Strip
Log from DIY Truck Camper
I got tired of the limited lighting options in my little camper, so I finally went and got a 16 foot long LED strip with one of the remotes. I mounted it on the ceiling, running from the end of the sleeping loft, all the way to the back wall, then doubled...

Dimming up at working
Log from LED cube using charlieplexing
I have the chance for another decent chunk of development time for the cube today. The big changes where I upped the internal clock in the MCU from 1MHz to 8MHz and did a lot of fiddling with interrupt timing. In the end I have the whole cube running...

First Steps
Log from Visual Robotics Platform
As I saw the need for an open and extensible robotics system that could address the needs I saw, I began looking for what systems were out there to address the various needs. I knew I would need to start with a solid chip at the heart of the platform,...

Very Narrow Bandpass Filter
Log from Yet Another Doppler Direction Finder w/ Teensy DSP
The DDFs of yore used switched capacitor filters to create a very narrow bandwidth signal to measure phase. The Teensy 3.2 has plenty of horsepower to do the same. There are many ways of doing this and I hoped to use the Teensy Audio...

Mounting the speaker
Log from Симон
The current design for Симон is a 3.5" circle. I believe I've figured out how to get a speaker on it.This speaker has a double-sided sticky foam pad on the bottom. The trouble is that in the center of the board, where you'd want...

XY Stage - Part 1
Log from MechaCore - Railcore Inspired 3D Printer
The Z stage is not yet finalized, but it's time to look at the XY stage, because we may need to backtrack to the Z once we do a pass on the XY. First we will look at the belt path. Here were using Gates PowerGrip GT 2 2mm pitch belts, 6mm tall. That...

Initial part selections
Log from LiFePO4wered/ESP32
ESP32 I'm using the ESP32-WROVER-I with external antenna for this project to take advantage of the PSRAM. Downsides are large physical size and losing two GPIO. Ethernet PHY The LAN8720A works well on the #wESP32, is well supported by the ESP32...

Electric/Electronic and a bit of software
Log from Cheap Expandable Floor Piano
Here is a picture of one octave assembled. I'll cover more in detail each parts.Below is each extremity of the thing. You can see the Main Power line that is used to bring power to the Leds, and the Category 5 cable and outlets that are used to bring...

analog.io web application
Log from analog.io - A full stack IoT platform
I'm happy to say that the analog.io web application has been successfully deployed to our servers at Digital Ocean! The site also uses ssl encryption for some added security.The web application is developed using multiple web technologies, at the base...

PCB update
Log from Scanning Tunneling Microscope
I now have a PCB for the data converters and analog electronics! Full schematics and gerber files are available on my website. I’m now using digital feedback and linearizing the tunneling current data in software using a logarithmic lookup table. This...

Limited GPIO? Hardly.
Log from ESP8266 DIN 8-Channel Wifi Relay Controller
The first step when beginning this project was dealing with the limited IO pins on the ESP8266 modules. The ESP-07 and ESP-12 modules break out all of the useful pins. A number of pins needs to be pulled high or low during power on so it boots off the...

1. Motor selection and control
Log from StrobeTuner
The heart of a strobe tuner is the strobe disk, driven by a small electric motor. It has to spin pretty fast (thousands of RPM), but the only mechanical load is inertia and air drag. The angular speed has to be very accurate and stable. These requirements...

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