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How to Maintain a MTD Yard Machine Garden Tractor
Details from How to Maintain a MTD Yard Machine Garden Tractor
Disassembly procedures Read some of the directions in Maintenance a MTD Yard Machine Lawn Tractor and perform SECTION G STEPS #01 - #15 contained therein. Only when fully completed proceed with those steps shown below. Step 1: Remove the fuel line hose...

"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...

Adding animatronic eyes
Instructions from A Workbench Companion, from an Amazon Echo Dot
I believe that the secret to creating truly meaningful human-computer interaction is to create some sort of emotional experience for the user. If we can make the user forget, even for just a few moments, that they are speaking with a computer—if we can...

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...

Generating video signals on a microcontroller with correct amplitude and impedance.
Hacker page by danjovic
Composite video standard defines a signal with 1Vpp amplitude under a 75 Ohms. From that signal 70% (0.7V) is the amplitude of video information which stands above a 0.3V pedestal, while the synchronism information (sync tip) corresponds to the remaining...

Making Soft Bubbles
Hacker page by Inne
Intro Soft robotics is a field that has fascinated me for the longest time. Though the research field is maturing, I still haven't seen many hobby level soft robotic projects. Starting with no prior experience, a little more than a year ago I got to...

Alula Electric Conversion
Details from Alula Electric Conversion
I bought an Alula a few years ago. It was everything that Dream Flight said it would be, but my old damaged elbow joints did not tolerate the process of throwing the Alula repeatedly. The Alula is a DLG (discus launched glider) from DreamFlight. I bought...

Z80 SIO Emulation (part 2)
Log from 3-Chip Z80 Design
SPoC Code Side The PSoC will need to poll the IO_Stat_Reg and wait until it sees IORQ* asserted along with either CPURD* or CPUWR*. It should then read the AdrLowIn status register. Using this information, the PSoC should then perform the IO operation. ...

Power Analyzer
Details from Power Analyzer
Working Principle The ATtiny814 controls the electronic dummy load with its internal digital to analog converter (DAC). All of its 5 internal reference voltages are being used in order to get the maximum accuracy and resolution of the DAC. The DAC is...

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...

0-30V, 0-7A Adjustable Switching Power Supply
Details from 0-30V, 0-7A Adjustable Switching Power Supply
DC to DC buck converters is a famous topology in the electronic and a widely used circuit in electronic devices. A buck converter steps down the input voltage while it increases the output current. In this article/video, I have discussed a DC to DC buck...