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| === Raspberry Pi DigiAMP{plus} | ||
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| With Raspberry Pi DigiAMP{plus}, you can connect passive stereo speakers up to 2x35W with variable output, making it ideal for use in Raspberry Pi-based hi-fi systems. | ||
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| DigiAMP{plus} uses the Texas Instruments TAS5756M PowerDAC and must be powered from an external supply. It requires a 12-24V DC power source (the XP Power VEC65US19 power supply is recommended). | ||
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| image::images/DigiAMP+_Board_Diagram.jpg[width="80%"] | ||
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| DigiAMP{plus}’s power in barrel connector is 5.5mm x 2.5mm. | ||
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| At power-on, the amplifier is muted by default (the mute LED is illuminated). Software is responsible for the mute state and LED control (Raspberry Pi GPIO22). | ||
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| DigiAMP{plus} is designed to provide power to the Raspberry Pi and DigiAMP{plus} together in parallel, delivering 5.1V at 2.5amp to the Raspberry Pi through the GPIO header. | ||
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There was a problem hiding this comment. Liz you can't decapitalise Amps, and Amp is an Amp, it is not an amp. It is (a) the name of the person, and (b) the name of the unit. Units named after people are always uppercased in physics. Should be "2.5 A" or "2.5 Amps" There was a problem hiding this comment. You left volts capitalised, so it's "5.1 V" not "5.1 v". That said engineers have a habit of lowercasing volts, and I will hunt all instances out and fix them. It's There was a problem hiding this comment. And the style-guide also says no space between the number and the unit, so "5.1V" not "5.1 V" There was a problem hiding this comment. Al and I have already had the Slack equivalent of a bar fight over this: I intend to continue it in a real bar tomorrow. Style guide says lower-case a, upper-case V, no space (for historical vernacular reasons as laid out by Hart's Rules - also observed yesterday that the Times' and Economist's style guides concur); it's a standard English usage thing rather than a physics/moral rectitude thing. Honestly (and this is where things start to go wobbly) I don't really like the inconsistency either, but if we make changes now it means that ALL of our materials for the last ten years are affected. And I'm not going to go through and make retrospective changes for consistency. In short, I might be persuadable on this, but, @aallan, you're going to have amazingly persuasive. There was a problem hiding this comment.
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| WARNING: Do not apply power to the Raspberry Pi's own power input when using DigiAMP{plus}. | ||
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| ==== Pinouts | ||
| [cols="1,12"] | ||
| |=== | ||
| | *P5* | Alternative power input for hard wired installations (polarity must be observed). | ||
| | *P8* | TAS5756m Internal GPIO1/2/3 | ||
| |=== | ||
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I think this is probably the internal and external diameters of the barrel connector, so describing it as "is 5.5mm x 2.5mm." probably isn't right?
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I think it's length of the plug, and diameter of the barrel? Umm. This needs clarifying I guess. @tobybroberts do you have actual hardware here to look at and measure things?