Which power supply for C1+

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Which power supply for C1+

Unread postby r11bordo » Sun May 07, 2017 2:31 am

Hi,
The C1+ power supply plug isn't quite frequent ... 0,8mm inner size doesn't allow to use external standard 5V power supply ...
So, I wonder if I can use the OTG USB port to power supply ? I will avoid to change the 5V plug by desoldering in order to have larger inner size.

Thanks
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Re: Which power supply for C1+

Unread postby odroid » Mon May 08, 2017 8:52 am

You can use the micro-USB ports as a power input path if you plug the J8 jumper between HDMI and micro-USB.
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Re: Which power supply for C1+

Unread postby LulaNord » Wed Jun 07, 2017 2:45 am

Hi...I bought a relatively cheap PCM1794 DAC board at $50 from China Ali-express
and connected to the C1+ via direct connection of I2S bus.
I used a toroidal transformer as a power supply like below picture. The transformer is around $30 in Korea local market.It works greatly with very high dynamic range (+125dB) and good frequency response.
But the SNR(Signal to Noise Ratio) and THD+N measurement values are worse than the official HiFi-Shield.
It shows around 100dB of SNR while the HiFi-Shield gives over 110dB.
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