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felipe  
#1 Posted : Friday, June 7, 2019 7:49:21 AM(UTC)
felipe

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Mine friend Antonio bought a 2nd hand B3 with volume control installed, I want to take off the volume control so I desoldered the pot and take off the firmware installed in IC8 but can't output sound, I owned a B2 and if I remember correctly a bridge was needed between ADC pins but I don't remember between wich one 3.3V & PB4 or PB4 & GND also I don't know if this is necessary for B3?

TIA
Felipe
Brian Donegan  
#2 Posted : Saturday, June 8, 2019 11:46:26 AM(UTC)
Brian Donegan

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Jumper between PB4 and 3.3. You also need the firmware chip installed.
felipe  
#3 Posted : Saturday, June 8, 2019 3:08:44 PM(UTC)
felipe

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Many thanks Brian, If I desolder the pot and take off the firmware chip is the same?
Brian Donegan  
#4 Posted : Saturday, June 8, 2019 3:14:16 PM(UTC)
Brian Donegan

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No, the firmware is required to configure the DAC. Providing volume control is just one of its functions.
felipe  
#5 Posted : Saturday, June 8, 2019 8:09:47 PM(UTC)
felipe

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OK thank you for support.

Bst
Felipe
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