alvarop/nui3Nui is an IR(evntually also BLE) controlled volume controller for analog audio. It sits between your audio source and speakers and can amplify or reduce the volume using IR commands (and evntually BLE).
Nui is an open-source printed circuit board by alvarop, from the alvarop/nui repository on GitHub, published under the MIT licence. It is a 2-layer board of 50.8 × 61 mm with 53 parts on 57 nets, routed with 400 tracks and 62 vias.
It is built around the NRF52810-QCAA-R, 2450FM07A0029T and PGA2311P, with the LM27762DSS and SP1002-02JTG among its other parts. Its parts include 23 capacitors, 7 resistors, 7 connectors, 4 ICs and 3 diodes. It belongs with the nRF52 and nRF5x boards of this library.
Nui is an IR(evntually also BLE) controlled volume controller for analog audio. It sits between your audio source and speakers and can amplify or reduce the volume using IR commands (and evntually BLE).
Why do I need this, you may ask?
It all started because I have my trusty Logitech Z-2300 speakers and subwoofer I purchased back arond 2004/5. They still work great, but instead of being on my computer, they are used for my TV. Unfortunately, the TV's line out doesn't honor the TV's volume and is always outputting at max volume. Sure, I can get up and change the volume on the speakers themselves, but wouldn't it be more convenient to do it with the TV remote?!
That's how the Nui project started. It sits between my TV and my speakers and now I don't have to get up to change the volume :D
| Qty | Value | Footprint | References |
|---|---|---|---|
| 3 | 0.1uF | Capacitors_SMD:C_0603 | C12, C13, C16 |
| 3 | 100nF | Capacitors_SMD:C_0603 | C4, C6, C10 |
| 3 | 10uF | Capacitors_Tantalum_SMD:CP_Tantalum_Case-A_EIA-3216-18_Reflow | C1, C5, C8 |
| 3 | 1uF | Capacitors_SMD:C_0603 | C15, C20, C21 |
| 2 | 12pf | Capacitors_SMD:C_0603 | C17, C19 |
| 2 | 2.2uF | Capacitors_SMD:C_0603 | C9, C11 |
| 2 | DNP | Capacitors_SMD:C_0402_NoSilk | C22, C23 |
| 2 | Filter | Resistors_SMD:R_0603 | L1, L2 |
| 2 | SP1002-02JTG | alvarop:SP1002-02JTG | D1, D2 |
| 1 | 0 | Capacitors_SMD:C_0603 | R1 |
| 1 | 0 | Resistors_SMD:R_0402_NoSilk | R2 |
| 1 | 1.58M | Resistors_SMD:R_0402_NoSilk | R7 |
| 1 | 1.74M | Resistors_SMD:R_0402_NoSilk | R4 |
| 1 | 100pf | Capacitors_SMD:C_0603 | C18 |
| 1 | 10k | Resistors_SMD:R_0402_NoSilk | R3 |
| 1 | 1uF | Capacitors_SMD:C_1210 | C3 |
| 1 | 2.2uF | Capacitors_SMD:C_0402_NoSilk | C7 |
| 1 | 2450FM07A0029T | alvarop:2450FM07A0029T | F1 |
| 1 | 32Mhz | Crystals:Crystal_SMD_2016-4pin_2.0x1.6mm | Y1 |
| 1 | 4.7uF | Capacitors_SMD:C_0805 | C2 |
| 1 | 4.7uF | Capacitors_SMD:C_0603 | C14 |
| 1 | 511k | Resistors_SMD:R_0402_NoSilk | R6 |
| 1 | 549k | Resistors_SMD:R_0402_NoSilk | R5 |
| 1 | ARM-SWD | alvarop:ARM_SWD_SMD | J7 |
| 1 | A_PWR | Pin_Headers:Pin_Header_Straight_1x03 | J3 |
| 1 | Antenna | alvarop:AMCA31-2R450G-S1F-T3 | AE1 |
| 1 | D_PWR | Pin_Headers:Pin_Header_Straight_1x03 | J1 |
| 1 | IR_RCV | Pin_Headers:Pin_Header_Straight_1x03 | J2 |
| 1 | Input | alvarop:SJ-3524-SMT-TR | J4 |
| 1 | LM27762 | alvarop:LM27762 | U2 |
| 1 | MIC550X | alvarop:SOT-23(M5) | U4 |
| 1 | NRF52810-QCAA | alvarop:NRF52810_QCAA_QFN32 | U1 |
| 1 | Output | alvarop:SJ-3524-SMT-TR | J5 |
| 1 | PGA2311 | alvarop:PGA2311-SOIC | U3 |
| 1 | TVS | Diodes_SMD:D_0603 | D3 |
| 1 | USB_OTG | alvarop:USB_MICRO_B | J6 |
The 49 most common of 53 parts.
It measures 50.8 × 61 mm and has 2 copper layers, 1.6 mm thick.
53 parts, built around the NRF52810-QCAA-R, 2450FM07A0029T, PGA2311P and LM27762DSS. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
From the alvarop/nui repository on GitHub, at the commit this page was made from: the board is hw/nui.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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