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RS232->TTL conversion
Log from What the Chook?
Yay, I heard back from the vendor that sold me the camera... apparently I can easy convert my RS232 camera to a TTL one by desoldering the MAX232 chip and adding a zero Ohm resistor (or just making a solder bridge).Still haven't decided on the wifi -...

Phase 2 - Prototype (software)
Log from LighTouch - Control music with the wave of a hand
I'm by no means a developer. I find a great deal of enjoyment in 'tinkering' with different programming languages and I prefer to learn as a go. To me it's like visiting a new country and trying to learn the language on the fly rather than...

Phase 3 - Alarm Clock
Log from LighTouch - Control music with the wave of a hand
The next step along the path was to include the alarm clock functionality in addition to standard music controls making this a bedside gadget.Making an alarm clock in python is fairly straightforward so I wanted to focus instead on the controls. The...

Software Proof of Concept functional
Log from HID emulator for Phone-based Password Managing
Today I completed a software-only prototype of my project. Using C# and the loopback interface, I've established a secure key exchange for safe bluetooth communications. The next step is to implement my dongle code on a microcontroller, and communicate...

AX220XX wireless to uart bridge: getting access, part 1
Log from DBPOWER ELM327 Wi-Fi Interface (OBD II) "review"
The chip with removed label may be an AX220XX compatible device, as its MAC is from this manufactuer. It offers a web interface, but only delivers an empty index.htm on port 80. Port 35000 bridges to the PIC microcontroller. Do not send "+++ return"...

The basic hardware layout
Log from Aaaaarc
All prototypes so far have split the workload into two parts. A small microcontroller for the direct device interaction, and a larger linux server for the interpretation of the received commands and storage of the sensor data. The first prototype...

Where to source FT232RL?
Log from Furious Tooth Fairy - Door Unlock
I just did a quick Google search for FT232RL ... the only sources are > 3€. So how it is possible to sell a Ftdi Ft232rl Usb To Ttl Serial Converter Adapter Module 5v 3.3v Forat 1,59€ with free shipping?For me the BOM would be something...

Back to the Drawing Board
Log from BluetoothLE APRS TNC
After a lot of debugging and testing the current state of the hardware design I decided I needed to go back to the drawing board. I was having a major problem trying to get TX data over the SPI bus to the pic. I don't have a proper logic analyzer, but...

Vocore
Log from Pico-Kubik quadruped robot
My vocore boards finally arrived. They are so tiny!So far not much done. I have tested one of the boards, ssh'd into it, installed the Micropython packages on it from the OpenWRT repositories, got TTL to work, tested that the interactive shell works.Next...

Servo Controller
Log from Pico-Kubik quadruped robot
After looking at the PWM library for Vocore (http://vonger.cn/?topic=pwm-is-running-at-gpios) and trying to actually solder more than 2 wires to its tiny 1.27mm headers, I decided that I don't want to drive those servos directly from Vocore. I need a...

Autonomous Walk
Log from Pico-Kubik quadruped robot
Camera and battery problems aside, I finally got this little fellow to walk on its own, without a cable connecting it to the computer. It still uses the serial interface to talk with an Arduino Pro Mini, which is its spinal cord, but this time the signal...

Battery powered
Log from Trinket serial & analog terminal
At the moment, the trinket is powered by battery :)Left to right: Trinket, battery level switch, charge/battery platform, 4 switchs (Rx/Tx/RTS /CTS to select TTL and/or RS232 level on each line)Middle right: Trinket power switch (On/Off)

Starting off
Log from Sniffing Trinket
For most of us, living and working indoors is a daily reality and with it the fact that indoor air quality is not always the best. We might start out in a fresh and well ventilated room but when we stay in it for hours the climate gets worse and worse....

Schematic and KiCad fun
Log from Sniffing Trinket
Hey there, I'm back and still living ...The last couple of days I was finishing off with the schematic and starting out with board layout. Here is the (almost) finished schematic:Small details might still change as I'm finishing up the board layout if...

Schematics Documentation
Log from Sniffing Trinket
A quick follow up on the schematic of the project. I thought I do some documentation so that people can follow what I have been doing. I will quickly go through the different parts of the schematic step by step and add comments where necessary.The gas...

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