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by RogerClark
Tue Feb 28, 2017 12:28 am
Forum: Projects
Topic: In car multigauge
Replies: 54
Views: 887

Re: In car multigauge

I've very sceptical about this.

I see no reason for Adafruit to have their BME280 on its alternative address apart from so their code library isnt immediatly usable for anyone elses modules.
by RogerClark
Mon Feb 27, 2017 8:31 pm
Forum: Projects
Topic: In car multigauge
Replies: 54
Views: 887

Re: In car multigauge

Adafruit deliberately use a different WHO AM I code for their products They do the same thing on the BME280 etc. They configure the hardware onto its alternative address, using a pullup or pulldown on the device, and their code only works with the alternative address. I think this is deliberate to m...
by RogerClark
Mon Feb 27, 2017 8:25 pm
Forum: Projects
Topic: Open Energy Monitor
Replies: 53
Views: 4895

Re: Open Energy Monitor

I dont have a central unit like a RPi etc, I have separate display units I made using Maple minis and the ILI9341 display. All my system does is read the power and broadcast on 433MHz, once per second. Multiple receiver units around the house display the power. I was intending to add power control t...
by RogerClark
Mon Feb 27, 2017 8:12 pm
Forum: Off topic
Topic: Arduino on Nordic BLE nRF51822
Replies: 42
Views: 6632

Re: Arduino on Nordic BLE nRF51822

Yep. Those boards are made by Wireless-tag. I have some of the larger ones, but they were more expensive when I bought them last year. The one thing they lack is the 32khz crystal oscillator which means they do not keep time very well when sleeping. Initially the repo I used / modified from RBL didn...
by RogerClark
Mon Feb 27, 2017 10:56 am
Forum: Postbag
Topic: Andy's Postbag and random ebay links
Replies: 20
Views: 414

Re: Andy's Postbag and random ebay links

Andy I got stung with SD cards and memory sticks from eBay as well, so I now only buy them from reputable shops I can drive back to and get my money back from if they are no good. I actually bought some 128Mb memory sticks last year, on purpose as I wanted something throwaway and cheap, and luckily ...
by RogerClark
Mon Feb 27, 2017 10:47 am
Forum: Projects
Topic: Open Energy Monitor
Replies: 53
Views: 4895

Re: Open Energy Monitor

I'm also starting a energy monitoring project :) As ESP8266 already has a emonTX lib I thought "why not adding an external SPI ADC and that's it???" :D I though of using MCP3008 (75-200Ksps) and 8 channels. Should be ok. But now I've read some of the posts on this thread and realized that...
by RogerClark
Mon Feb 27, 2017 10:40 am
Forum: Off topic
Topic: Kicad
Replies: 27
Views: 287

Re: Kicad

I'm actually getting the board assembled in china, as I can't solder these devices, so I have to use whatever PCB house they use.

But I've checked and they are OK at 0.2mm vias
by RogerClark
Mon Feb 27, 2017 5:50 am
Forum: Off topic
Topic: Kicad
Replies: 27
Views: 287

Re: Kicad

I think 9 mil drills (0.2mm) are pretty standard - should not be too much an increase - and the breakout of BGA needs narrow wires as well. The fab I used to make my boards last time supports 8mil drills and 5mil wire in their lowest priced bracket. Thats good to know.. I didnt ask if using 0.2mm v...
by RogerClark
Sun Feb 26, 2017 10:24 pm
Forum: Off topic
Topic: Kicad
Replies: 27
Views: 287

Re: Kicad

The PCB company can do 0.2mm vias, but I will try to avoid going that small and see if I can use 0.3 or 0.4 and stagger Yes, a much better approach IMHO: the board house can probably reach 0.2 mm, but you will pay premium for it, you'd better stay with 0.3 mm, this is a standard capability and will...
by RogerClark
Sun Feb 26, 2017 9:08 pm
Forum: Cores
Topic: List of cores currently available
Replies: 47
Views: 5175

Re: List of cores currently available

That's all correct. Just one huge thing is missing from Arduino IDE: the debug interface... I recall asking various people in the Arduino organisation about this, (well over a year ago), and strangely they said it would be too difficult for beginners to understand and use. IMHO this is ridiculous, ...

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