Author Topic: Digistump  (Read 686 times)

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Offline Seaofdep

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Digistump
« on: October 22, 2017, 03:37:32 am »
Hi I ordered a couple of these digistump a while back . This one I just had sitting in a dresser. Well finally had use for it and it was not working , I noticed a component was knocked off . I was wondering can I easily replace it using some board laying around an if so   What exactly needs to replace it . Any help is appreciated , thank you update of better pic close up of board
It is above USB first pin bellow attiny microcontroller


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« Last Edit: October 22, 2017, 05:17:34 am by Seaofdep »
 

Offline Ian.M

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Re: Digistump
« Reply #1 on: October 22, 2017, 04:55:14 am »
From pictures and schematics on the Digistump site, that's  D1 on the Digispark board, which is a 3.6V Zener that clamps the USB D- signal from the ATtiny85 PB3 pin so it doesn't damage the host USB controller.  Plugging it in without replacing it would be a *VERY* bad idea.   Fit the replacement  with the anode to ground.   D2 in between the ATtiny85 and the regulator is the same type, so if you can read its markings, you can do a SMD codebook search to find the part number, or trawl through your preferred supplier's parametric search for a small 3.6V Zener with the right dimensions.
 

Offline Seaofdep

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Re: Digistump
« Reply #2 on: October 22, 2017, 05:29:59 am »
From pictures and schematics on the Digistump site, that's  D1 on the Digispark board, which is a 3.6V Zener that clamps the USB D- signal from the ATtiny85 PB3 pin so it doesn't damage the host USB controller.  Plugging it in without replacing it would be a *VERY* bad idea.   Fit the replacement  with the anode to ground.   D2 in between the ATtiny85 and the regulator is the same type, so if you can read its markings, you can do a SMD codebook search to find the part number, or trawl through your preferred supplier's parametric search for a small 3.6V Zener with the right dimensions.

Thanks a lot . Being new to this field. Sometimes I forget to take a step back and se how simple and or easy something really is. It was a bit tricky but managed to get in close enough to see is markings thanks a lot


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Offline Ian.M

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Re: Digistump
« Reply #3 on: October 22, 2017, 05:51:17 am »
Great. that looks up to BZT52C3V6S, available from most major distributors.  Check the dimensions to confirm then put a couple on your next order.
 


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