Bitcoin Forum

Bitcoin => Hardware => Topic started by: spazzdla on November 04, 2014, 02:08:06 PM



Title: Undervolting S1
Post by: spazzdla on November 04, 2014, 02:08:06 PM
Has anyone undervolted their S1, if so how long has it been running undervoltated and how often do you have to re-apply the pencil mod.

Any one ballsy enough to put solder a resister onto it?


Title: Re: Undervolting S1
Post by: aurel57 on November 05, 2014, 09:39:36 AM
Has anyone undervolted their S1, if so how long has it been running undervoltated and how often do you have to re-apply the pencil mod.

Any one ballsy enough to put solder a resister onto it?

I had at one time 9 penciled modded and they worked great for months until I sold them. Here is the thread on how to do it  https://bitcointalk.org/index.php?topic=526060.0   (https://bitcointalk.org/index.php?topic=526060.0)


Title: Re: Undervolting S1
Post by: MrTeal on November 05, 2014, 10:46:50 PM
Has anyone undervolted their S1, if so how long has it been running undervoltated and how often do you have to re-apply the pencil mod.

Any one ballsy enough to put solder a resister onto it?
I soldered resistors on mine, it takes less than 5 minutes to do a unit. If you've got a proper iron and some experience, I'd recommend it over the pencil mod.


Title: Re: Undervolting S1
Post by: spazzdla on November 06, 2014, 12:44:46 AM
Has anyone undervolted their S1, if so how long has it been running undervoltated and how often do you have to re-apply the pencil mod.

Any one ballsy enough to put solder a resister onto it?
I soldered resistors on mine, it takes less than 5 minutes to do a unit. If you've got a proper iron and some experience, I'd recommend it over the pencil mod.

What resistor did you use?  

Run it in parallel?

Seems I want to go for 2.9k Ohm.

If it's 4.47K ohm to get 2.9k Ohm,

1/2.9 = 1/4.47 + 1/x

.3448 = .2237 + 1/x

.1211 = 1/x

x = 8.257K ohms.


Or do you just replace the resistor?


Title: Re: Undervolting S1
Post by: MrTeal on November 06, 2014, 02:34:53 AM
Has anyone undervolted their S1, if so how long has it been running undervoltated and how often do you have to re-apply the pencil mod.

Any one ballsy enough to put solder a resister onto it?
I soldered resistors on mine, it takes less than 5 minutes to do a unit. If you've got a proper iron and some experience, I'd recommend it over the pencil mod.

What resistor did you use?  

Run it in parallel?

Seems I want to go for 2.9k Ohm.

If it's 4.47K ohm to get 2.9k Ohm,

1/2.9 = 1/4.47 + 1/x

.3448 = .2237 + 1/x

.1211 = 1/x

x = 8.257K ohms.


Or do you just replace the resistor?

I just soldered an 8.25k resistor on top of the existing one. Removing the original would probably triple the amount of time the mod takes.