Makers and developers looking for a way to control both digital and analogue audio within the same project without creating any background interference such as audible noise all mains hub.
Maybe with giving the SilentSwitcher control board designed, created and built by Jan Didden a little more investigation. Watch the video below to learn more about this small control board that will power your mixed analog/digital project with no audible noise, no mains hum, no RFI and even minimal heat, says its creator.
The SilentSwitcher is a solution for powering your small-signal audio circuits with quiet, low noise and efficient power, totally separated from the mains. Audio projects are steadily getting smaller and the power supply with its transformer and rectifier and reservoir caps remain as large and looming as ever. I had been looking at switched-mode power supplies before and was never quite satisfied, but that has recently changed a lot for the good. The very high requirements for tablets and smart phones have driven switcher technology to incredible quiet and low noise performance. Also, linear (post) regulator performance has leapfrogged those old audio standby’s like the LM137/337 series.
Almost any small signal audio project will benefit from a SilentSwitcher. A RIAA phono preamp; a line preamp with or without tone controls, an active filter, buffers, cross-overs. Electronic volume controls, headphone amps; anything that has opamps in it. Opamp and discrete audio circuits almost always run at +/-15V, and even if the are designed for say +/-12V or +/-16V, they will almost always run fine at +/-15V. At 150mA (or more, see below at powering options) it’s enough for all but the most power hungry circuits. The 6/5/3.3V output would be ideal for a DAC or streamer with a dedicated controller. The 0.5A current (up to 1A with extra power option, see below) goes a long way to power a dedicated unit with a display, some relays, LEDs, etc.
SilentSwitcher is a very high performance turnkey power supply for such mixed systems. The linear post-regulators have a PSRR of over 60dB at more than 1MHz – exactly what is needed to clench what little ripple remains from the switcher. I also put a lot of effort in designing the PCB to avoid excess radiation; very low impedance ground- and current paths, sort traces, decoupling caps right at the source, etcetera.
For more information on the new SilentSwitcher jump over to the Kickstarter website for details by following the link below.
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