Good morning,I finally found time to update my project log. A lot has happened since the last update, unfortunately not related to the Smart Greenhouse, which has been in use by my wife for her dings and dents.3D printing3D printing happened to me, and...
This Al sheet kept lifting on one end so I added a small L piece to keep it in place. Also planed and polished the frets one more time and lowered the action.
Wiz820io power on problem. Some months ago I have found that the wiz820io is not recovering correctly on power failure. There is needed to reset it after power on. Sadly I have connected the reset of atmega to wiz820io. There was two possible solutions...
Shortly after introducing rearranged PCB layout for nodes, I realized that I use LiPo batteries in all my battery powered nodes. That is making no use of the step up capabilities of the DC to DC converter. When designing it I was wanting to have possibility...
Lately I have stared to play even more with various remote sensors wirelessly connected to OHS gateway. I have used my standard radio nodes, but its versatility is somehow to much for small wireless node. To save space and gain easier access to pins...
I did not post too much updates recently, but I was quite busy with new version of gateway. I manage to draw and let fabricate new PCB with 32bit ARM chip as main controller. For the purpose of first design I have shrunk the PCB to 100x100mm, but I have...
Over past few months I have prepared new version of OHS gateway called simply 2.0.4. It is new iteration of my 2.0 version fixing layout defects and integrating new features. Here are the specifications: STM32F407 with 1GB of flash and 128KB + 64KB CCM...
Day one was scuppered by lack of appropriate screw drivers, apparently I have all the larger and smaller sizes, but not the one I needed to get the two deeply recessed screws out of his back. Day two was a bust because once I got the right screwdriver...
So what’s a toy robot without beeps and boops?I’ve worked on a project before that played wav files off an SD card using an AVR, however it takes pretty much all the processing juice the chip has to play audio. So the idea is to have a separate chip...
I've modified the firmware to drive a couple servos and toggle GPIOs on serial command.The servos are being software driven in the audio interrupt. The interrupt runs at 31250Hz, so it means we can drive servos with 32 positions.To set the servo position,...
Today I finally got a chance for some quality time with the Dremel. I have decided to drive the arms directly with small 9g servos. This meant removing the square bar that connected them and carefully chopping away various protrusions, including the...
This update has been a long time coming. Although I had roughly this leg drive system in mind since the beginning, it has proved quite fiddly to implement, as mechanical things often are. My plan was always to use a servo converted to continuous...
Finally we take a break from mechanical nonsense and play with lasers. Fortunately Scott always has a shipment coming in from DealExtreme, and the most recent one happened to have a 6mm, 5mW, laser pointer diode in it.The diode could have been made for...
There was not a lot of space left in the chest after installing the arm servos, but they couldn't go anywhere else. The next biggest things are the batteries, so they needed to be placed next. I tried all the orientations I could think of, the only way...
Most of the components in the robot require 5V (some can take more than 5V, but the servos could not tolerate the 8.4V that the batteries would supply at maximum charge). The arduino has a regulator onboard, but it is not sufficient to supply regulated...