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RetroChallenge 2023/10 Log Entry #1
Log from PicoRAM 2090
I have signed up for the RetroChallenge 2023/10 - my goal is to turn this into the multi-functional Microtronic extension I've been dreaming of. As described on the RetroChallenge page: My goal is to create a multi-purpose expansion for the Busch Microtronic...

Motor Angle Calculation Breakdown
Log from Roboartist
We thought you might be interested in knowing the mechanics and math involved in four stage arm control. Its quite simple really. We hope this will help a few new hackers with their future builds. Here we go...The aim of this algorithm is to determine...

Mounting the device
Log from Skype robot
Mounting the tablet or laptop could be challenging... personally I would love to mount the device the same height as my kid so I can have conversation easier. However the tablet I have is very heavy in compare to the tank platform...

Mark II - The fabrication
Log from Skype robot
So, in case you are bored and want to do something different in the weekend, this is the exact step by step to help you burn 20 hours.1. Buy a perfectly good 1:16 or bigger RC tank from RC store or Amazon for 99 bucks, mine is a Tiger 1 tank.2....

Building the thrust testing rig, part 1
Log from GimbalBot
A few boxes arrived this week, so I got started on the thrust measurement frame this weekend. I watched a number of videos on safe CFRP working procedures (since I'm cutting simple shapes myself at home), including the one in the previous post. I spent...

Hackaservo.io
Log from GimbalBot
So I've come to the conclusion that my servos were designed to actuate smaller masses, and as such their control parameters aren't exactly suited for the larger than normal loads I'm putting on them. The vibration I'm seeing at the end of each stroke--particularly...

Arc tangent lookup function
Log from Icepick Delta
After struggling with C code for a while I've managed to make a function which calculates the arctangent value by means of a lookup table, which is much faster than recalculating the arctangent value each time it is needed. But is it actually faster...

Tutorials
Log from The Tinusaur
If you're not experienced software developer those tutorials might be helful Tutorial 001: Blinking LED x1 - How to write the "Hello World" for a microcontroller - blinking LED.Tutorial 002: Fading LED x1 - How to use PWM (Pulse-width modulation) to...

FreeBasic Reciever Code
Log from Ultrasonic Radar & Robot
'Freebasic Rangefinder Reciever Code #Include "FBGFX.bi" Using fb ScreenRes 800,600,32 Const TRUE = 1 Const FALSE = 0 Const maxdistance = 100 'Maximum distance we want to read Const factor = 250 / maxdistance 'scale factor for drawing bars Const minang...

Frame Construction
Log from Insect Camera Rig
I have the basic frame of the insect rig partially done. It is made with aluminum square tubing. This makes it nice and sturdy while still being light. I've drilled some extra holes in it to let me play around with mounting positions to see which works...

Updated Design with Grips
Log from Strong Arm
The grips are based on 3/4" aluminum square tubes. The predicted squeeze strength is around 40 pounds.What about safety? Using PyUltimateRobot (see that Hackaday page), one can limit maximum force of any component of any movement. For example, you can...

Higher Resolution Proof of Concept
Log from Active Linear Multi Element Sonar Array (ALMESA)
First set of sensors arrived yesterday from Amazon. 20 minutes of soldering later they are hooked up to the arduino. I had time over the weekend to write the code to drive them all and return the values in a defined format sample: [04]:[67]:[45]:[90]\r\nI...

Cartridge Design - Overview
Log from Pill Minder - Automatic Pill Dispenser
The first step in designing our machine it to figure out a template for the cartridge. We need this so we can figure out the scale of the appliance. Design considerations are as follows:Cartridge should enter appliance from the frontCartridge should...

The dust sensor
Log from Portable environmental monitor
If the space on the already crowded PCB allows it, the uRADMonitor-D will incorporate a dust sensor as well. I did my homework and the GP2Y10 sensors are ready to be used.Featuring an infrared LED and, a receiving phototransistor and two lenses, this...

Module Electronics & Connections
Log from Modular Vertical Farming
So, I think I've found a good solution for electrical connections between the frame and module. To recap, we need the following connections:GND, SCK, SDA, SOL (solenoid), 12V (for led strip), 5V (for microcontroller.)Now, I've decided to add another...

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