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DIY Pocket PiGRRL PowerBoost 1000
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Please be positive and constructive with your questions and comments.

DIY Pocket PiGRRL PowerBoost 1000

by vanwilder on Mon Aug 19, 2019 6:11 pm

Hi everyone,
recently I bought Pigrlls pocket kit.
I put it together and had a lot of fun with it.
A couple of days ago PowerBoost 1000 started acting funny.
It would cut off suddenly and it would not start by turning on the switch.
It only starts if you plug-in USB cable to charge.
After it starts it runs without a problem, and I can disconnect the USB.
If I turn it off I have to use the USB cable to start it again.
I did some checking just to make sure nothing else causes a problem.
The switch is ok, I tried using a different battery, checked all solder joint.
At this point, I am quite sure that the PowerBoost 1000 is somewhat faulty.

Please advise if this is something that can be fixed.

Thank you in advance.
Best regards,
Marko

vanwilder
 
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Re: DIY Pocket PiGRRL PowerBoost 1000

by adafruit_support_mike on Wed Aug 21, 2019 12:28 am

Post a photo showing your hardware and connections and we'll take a look. 800x600 images usually work best.

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Re: DIY Pocket PiGRRL PowerBoost 1000

by vanwilder on Sat Aug 24, 2019 1:38 pm

Hi Mike,

here are pictures of the circuit.
The first picture shows the system powered off and charged up.
1.jpg
1.jpg (674.71 KiB) Viewed 97 times


The second picture shows system unplugged from USB and the switch in on position.
At this point nothing happens.
2.jpg
2.jpg (679.24 KiB) Viewed 97 times


The third picture shows that if I plug in a USB power the system turns on.
At this point, I can disconnect USB and it will continue to work until I turn it off.
3.jpg
3.jpg (633.72 KiB) Viewed 97 times


I also did some testing.
If there is no load attached to the booster everything works fine.
Also when I turn on the switch on if the USB power not plugged in the battery voltage goes from 4.23V to just under 1V.
After plugging in USB power everything goes back to normal.
If the switch is in the on position while plugging in the battery into the booster it will turn on.
I also tested everything with two other batteries 4000mAh and 650mAh with the same results.
I tested all of this with RPI plugged into the screen and only powering the screen and amp

Let me know if anything looks weird.

vanwilder
 
Posts: 5
Joined: Sat Aug 10, 2019 8:31 pm

Re: DIY Pocket PiGRRL PowerBoost 1000

by adafruit_support_mike on Sat Aug 24, 2019 9:41 pm

Thank you. Your construction looks pretty good.

With USB disconnected, what voltage do you see between the PowerBoost's BAT and GND pins, and between VS and GND?

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Re: DIY Pocket PiGRRL PowerBoost 1000

by vanwilder on Fri Oct 04, 2019 12:08 am

Hi, it took me a little while to get around testing, but here are results:
I started by unplugging the battery from the booster and measured the voltage of 4.22V
Then I plugged it into the booster while the switch was in off position and measured VS-GND at 4.22V and Bat-GND 4.22V.
When I switched the switch to on position I measured VS-GND at 1.26V and Bat-GND 1.26V.
Then I turned the switch off and measured VS-GND at 2.28V and Bat-GND 2.28V.
At that point, I unplugged the battery to measure the voltage on it while outside the circuit.
I measured 4.22V.
Then I switched the switch to on position and then plugged the battery into the booster.
At that point, booster powered the rest of the devices and I measured VS-GND at 4.14V and Bat-GND 4.18V.
I turned the switch off again and measured VS-GND at 0.91V and Bat-GND 0.91V and then after a second, it spiked to VS-GND at 2.26V and Bat-GND 2.26V.
I plugged in USB power and measured VS-GND at 5.07V and Bat-GND 4.24V.
Then I turned the switch on and the VS-GND is 4.97V and Bat-GND 4.22V.
I unplugged the USB and measured VS-GND at 4.15V and Bat-GND 4.18V.
And at last, I turned off the switch and measured VS-GND at 2.26V and Bat-GND 2.26V

Let me know if this helps in determining the fault.

vanwilder
 
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Joined: Sat Aug 10, 2019 8:31 pm

Re: DIY Pocket PiGRRL PowerBoost 1000

by adafruit_support_mike on Fri Oct 04, 2019 1:21 am

That does sound like the PowerBoost has failed. When did you get it?

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Re: DIY Pocket PiGRRL PowerBoost 1000

by vanwilder on Fri Oct 04, 2019 9:28 am

I got it as a part of the Pocket PiGRRL kit around the end of June, maybe the begining of July.

vanwilder
 
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Re: DIY Pocket PiGRRL PowerBoost 1000

by adafruit_support_mike on Sun Oct 06, 2019 1:41 pm

I'm afraid that puts your first post past our 30-day return/replace period.

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Joined: Thu Feb 11, 2010 2:51 pm

Please be positive and constructive with your questions and comments.