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Arduino
From: Chris (CHRISSS)
30 Mar 2015 23:37
To: ALL
366 of 542
40898.366
Well no wonder I'm not getting the battery life I want. This thing is using 2.2mA when sleeping with nothing else plugged in or working. Not too good. I've got my multimeter current sensing working. The fuse had blown. Made a little shunt to bypass it for now.
Nothing like the potentially 1uA some people have got them down to. More work to be done.
From: Chris (CHRISSS)
2 Apr 2015 00:23
To: ALL
367 of 542
40898.367
I've had some success with the barebones Atmel chip. I plugged it into the breadboard and tried to connect with AVRDude and nothing happened. Silly me, I didn't connect the crystal. It has an Uno bootloader so was expecting 16MHz.
I've set the fuse bits so it can run off it's internal clock, pulled the crystal out and AVRDude connecting now. Just need to work out how to program it now or which boot loader to give it.
From: Chris (CHRISSS)
2 Apr 2015 00:51
To: ALL
368 of 542
40898.368
/Much/ better. 28uA when using the same sleep test. Wonder if I can get it down further.
From: Chris (CHRISSS)
3 Apr 2015 01:16
To: ALL
369 of 542
40898.369
Ive done a little bit of testing tonight. Running off the batteries I got a powrr consumption of 22uA. When I connected the battery to the 3.3av step up and used that to power the Atmel it increased to 81uA. 4 times as much.
From: Chris (CHRISSS)
4 Apr 2015 09:26
To: ALL
370 of 542
40898.370
I was playing around with my barebones last night (YJ), programming it with my USBasp. It was programming fine but as soon as it reset to actually run the sketch nothing happened. It would occasionally work when I switched the jumper on the USBasp to 5V instead of 3.3V.
Strangley plugging it into the battery worked fine. I think I shorted something on the programmer (I plugged the + and - into the - on the breadboard) and broke something on it.
Had another 1 (supposed to be 2, only 1 turned up) Atmel chip turn up but couldn't get that one to work at all.
From: Chris (CHRISSS)
5 Apr 2015 00:36
To: ALL
371 of 542
40898.371
This has been driving me nuts. I've been modifying the examples for the temperature sensor and radio to test switching them on and off and I could get them working. When I added it to my temp logger code things didn't work. AARRGGHHH!!
I /think/ I may have finally cracked it though. Not sure it is working 100% reliably though, I will have to test that. But I have something on a breadboard that consumes about 4uA when sleeping. Should last a while on batteries.
The radio works fine. It was the temperature sensor that was the pain! The 3.3V step up uses about 90uA not doing anything so I didn't want that going all the time.
From: Chris (CHRISSS)
8 Apr 2015 09:56
To: ALL
372 of 542
40898.372
I had forgotten I'd ordered this. I think I must have done it when I'd had too much wine. Turned up this morning. 10x Atmega328ps and crystals, caps, etc.
EDITED: 8 Apr 2015 09:57 by CHRISSS
From: ANT_THOMAS
8 Apr 2015 10:50
To: Chris (CHRISSS)
373 of 542
40898.373
In reply to
40898.372
How much does that work out per complete unit?
EDITED: 8 Apr 2015 11:02 by ANT_THOMAS
From: Chris (CHRISSS)
8 Apr 2015 11:05
To: ANT_THOMAS
374 of 542
40898.374
In reply to
40898.373
£1.99 each from the UK.
EDITED: 8 Apr 2015 11:05 by CHRISSS
From: ledlightmake (SUNJIMMY)
2 May 2015 02:28
To: Chris (CHRISSS)
375 of 542
40898.375
In reply to
40898.352
I
've
also
control
Light in the bedroom
(
http://www.ledlightmake.com/led-lamp-c-77_78/e27-led-bulb5w-multicolored-rgb-16-colorwith-remote-control-p-203.html
)with MCU(PIC12F675).
APPROVED: 2 May 2015 09:31 by MATT