Title: PAW18 - SMD Practice Skull
Post by: matseng on July 20, 2013, 08:56:54 am
Post by: matseng on July 20, 2013, 08:56:54 am
Next week I'll be travelling a lot so I'll probably won't have time to work on any projects. Therefore I'll publish next weeks PAW already now.
I while ago I chatted with (Re:load) Nick Johnson about making some simple pcbs for learning how to solder smd parts. This is one of the boards that I came up with.
All parts are 1206 except for the transistors that are SOT23 so it should be rather easy to solder this even with a rather coarse tip on the soldering iron. I haven't tested for how long the battery actually will last, but it will probably flash for a couple of days.
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I while ago I chatted with (Re:load) Nick Johnson about making some simple pcbs for learning how to solder smd parts. This is one of the boards that I came up with.
All parts are 1206 except for the transistors that are SOT23 so it should be rather easy to solder this even with a rather coarse tip on the soldering iron. I haven't tested for how long the battery actually will last, but it will probably flash for a couple of days.
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Title: Re: PAW18 - SMD Practice Skull
Post by: matseng on July 27, 2013, 07:18:25 pm
Post by: matseng on July 27, 2013, 07:18:25 pm
[quote author="matseng"]I haven't tested for how long the battery actually will last, but it will probably flash for a couple of days.[/quote]
Ok, I'm quoting myself here :) The leds are still blinking after one week! Not bad considering the power source is a single no-name CR2032 battery and the leds are blinking (there's always one led lit) and not flashing....
Ok, I'm quoting myself here :) The leds are still blinking after one week! Not bad considering the power source is a single no-name CR2032 battery and the leds are blinking (there's always one led lit) and not flashing....
Title: Re: PAW18 - SMD Practice Skull
Post by: Bertho on July 27, 2013, 07:42:13 pm
Post by: Bertho on July 27, 2013, 07:42:13 pm
[quote author="matseng"]The leds are still blinking after one week! Not bad considering the power source is a single no-name CR2032 battery and the leds are blinking (there's always one led lit) and not flashing....[/quote]
Have you measured the current?
Most cr2032 are between 180 and 230mAh...
Have you measured the current?
Most cr2032 are between 180 and 230mAh...
Title: Re: PAW18 - SMD Practice Skull
Post by: matseng on July 28, 2013, 08:57:30 am
Post by: matseng on July 28, 2013, 08:57:30 am
I haven't checked, but it must be <1.4 mA in average since one week is 168 hours. 168*1.4= 235mAh.