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Removing undesired reflections/spots
Log from Open Indirect Ophthalmoscope
Hey all!This is another project log to update the latest developments of OWL (Just in case you forgot, we call it OWL because, well, Open Indirect Ophthalmoscope, OIO).So, since the last time I made a log, we’ve been working on--making an elegant GUI...

Firmware update: Menu system and two-week battery life
Log from Color Open Source Smartwatch
I've redesigned the way screens/apps are handled and introduced a main menu. More importantly, I have managed to get the average current consumption down to 350-550uA (1.5mA previously)! Turns out a huge chunk of it - 800uA, was a bug in the TWI (I2C)...

Procuring/Ordering components and parts for projects
Log from evive: a prototyping platform for makers
One of the important challenge we faced was to procure or order parts for prototyping some new design. Regularly we need to get new parts (which are not in our inventory :) ) as for product level development we need to iterate for making it robust and...

Simple Command Driven Interface
Log from Not Quite Useless Raspberry Pi Replacement
Wrote a very basic command interface with three commands:W - Write the EEPROMR - Read the EEPROMB - Bounce an LED across the RPP-UIO-16 cardThe result looks like this:Write to the EEPROM Read from the EEPROM 0000 00 01 02 03 04 05 06 07 08 09 0a 0b 0c...

INFORMED HEX DUMP
Log from WIERD PROTOCOL
66 03 60 4D F5 66 03 C0 SOH DE 1D 40 E5 #62 E7 41 EE 70 48 4F 52 50 43 35 33 32 34 37 36 19 06 22 06 22 SOH10 46 30 46 19 SOH42 70 40 40 40 40 40 40 30 30 31 38 30 33 35 33 32 34 37 36 4B 08 08 DC C1 C1 32 DC C1 C1 32 42 B4 42 B4 02 SOH02 02 02...

Mystery of Green and Blue light
Log from Automatic Diet Tracker
I know the title sounds really mysterious, but just have a look at the gathered data.(Date Time R_max R_min G_max G_min B_max B_min Ir_max Ir_min)2014/8/23 0:39:55 55 49 1 0 1 0 25 22 2014/8/23 0:59:1 84 73 2 1 1 0 47 41 2014/8/23 9:7:35 97 87 3 1 2...

Software and Remote Data Logging
Log from Bee hive health monitor
Completely rewrote the software to make it more modular based on the process flow. This took a major effort, but will allow for future modifications and customizations. It will also increase reusability for my other projects, like the weather station....

Diving in with Calamity and Confusion
Log from Voyage 200 Upgrades
On my TI-89, one of the battery contacts on the PCB was heavily corroded and it took a good deal of time and heat to reflow solder to make a new pad. I did this to the V200 as a preventative measure too, but I guess I heated up the nearby fuse to where...

Battery life and power consumption
Log from RAD (Rodent Activity Detector)
The battery we chose for this project is a large 6600mAh battery sold by Adafruit. We measured the power consumption of the entire device to be ~15mA, so it should last 440 hours, or about 18 days on a full charge. Below is a discharging...

Deep Sleep
Log from ESP8266 Native
I've been testing the deep sleep mode on the ESP-03. I loaded the frankenstein firmware from here https://github.com/nekromant/esp8266-frankenstein onto the module to test the deep sleep mode.Note, you need to tie gpio15 to GND in order to boot any firmware...

Scanner function
Log from DIM-110
I have finnished a function, what this DIM-110 machine can do. It is scanning small objects like IC die's. The actual field of view of the microscope is around 300 micro meter the scanning works like a mosaic, it takes small pictures in a dfined patter...

Pt.1 Sensor Design and Prototyping
Log from WiFi-Enabled Visual Doorbell
Full video on this subject (this is literally the script): https://www.youtube.com/watch?v=Psy6lRcdGtk Introduction Old houses, like my parents’ home, comes wired with simple electromechanical doorbells. They’re a simple electromagnet with a metal...

FAT32 File Format
Log from OSI SD Card Operating System (OSISDOS)
When you search google for FAT file format you get tons of pages on formatting disks. It's harder to pull out the detailed format of the SD card. Wikipedia to the rescue (Design of the FAT file system). A less technical FAT32 Wikipedia page is File...

AES-256 Is Not Enough: Breaking a Bootloader
Log from ChipWhisperer®: Security Research
I'd been pushing hard trying to get a demo of how you can break an AES-256 bootloader. This type of bootloader is often used in products for protecting firmware updates and a good demonstration of why you should care about side channel attacks as an...

The resistive touchscreen
Log from Portable environmental monitor
July was a tough month, and August is no different. Due to some components arriving late, I've only been able to start my work on the Hackaday.io project with considerable delay. So I had to catch up with everything and squeeze the entire development...

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