GrillUp

I did first tests in Saturday. Some minor problems with calibration, as expected laser pointer is largely inaccurate past 10 cm distance. Also, the device doesn't work with beer, just foam everywhere...

Here is a short video:

I don't have access to photographic tripod and I decided spend money on beer instead of buying one. On the pictures below you can see tripod I made of scraps of wood in 40 min. It works.

Also, I finally received 5 probes from China!

Next step: video of working device (with sausages etc.). Expect new video after weekend.

We had national holiday last friday and I had very little time to work on this project (I wish I had it done by then).

Shape of the pump, it's connectors and extra battery pack made fitting the components inside the case a (small) challenge. In previous version of this project both water pump and it's batteries were simply glued to the back of the device.

I made short 2-minute video describing the project and showing how it works (in garage). I will post it in the description section. I had to skip a lot of footage to meet ~2 min requirement, if I won't receive temperature probes this week I'll upload it, as it is always better than nothing.

Next step: tripod and bottle holder

I did most of the soldering today. I failed at ground plane while designing the PCB, GND pin of: ISCP, 3.3V LDO and status LED were not connected. I thought DRU provided by fab house would check that, my bad.

Another problem I found 3 days after placing the order is that transistors used for turning on water pump and laser pointer are not connected to the ground. 

So, 5 jumpers, I should probably stop calling this a 'final version'.

Using Arudino Uno I uploaded bootloader to new device. After uploading sketch I briefly tested bluetooth connectivity, controlling servos and switching on water pump, so far no problems.

Next step: fitting stuff back into box.

I received package from smart-prototyping.com today. My order included LEDs, transistors, voltage regulators, Atmega328P-AU, bluetooth module and PCBs(!). I had to pick it up personally at postal office, apparently the outer (paper-ish) layer of air bubble envelope was damaged. After quick inspection, I think that nothing is missing. 

10pcs 2-layer boards with dimension up to 50x100mm cost 10.99$. They have also summer discount, where you can get 100x100mm board at that price. With 10$ standard shipping I got my order in ~12 days. 

The package arrived from China. On the board I checked there were no shorts or disconnected paths. Together with parts from tme.eu I have almost complete part list. 

Time for some soldering! Also, I'm still waiting for the probes, I hope they will arrive in time.

This is schematic of new version of my device. The prototype was just a shield for Arduino Uno, new version is standalone. The microcontroller is based on Arduino Mini with Atmega328P-AU.

ICSP and FTDI headers are included to burn Arduino bootloader and upload sketches. UART can be switched between FTDI header and HM-10 module via two jumpers.

It's designed for 3.3V HM-10 module without logic level converter or voltage regulator, however I included header for 5V version with level converter (which I'm sure that works).