echowawa

Note

This project is still in progress and not even close to being finished. Not even built yet.

Your typical DAC with bluetooth audio (with possible upgrades to use WiFi sources) and a USB C as an AUX port. It can output to either RCA jacks or a headphone jack. It also features a pretty fancy oled screen with its cool menu navigated via the knob.

The reason I made this was because of the fact that I am no longer a fan of using cheap bluetooth magic boxes with bad audio output when I can make my own magic box with probably better audio quality and a better design.

Images

The echowawa pcb

The echowawa case

The echowawa root schematic

The echowawa power schematic

The echowawa audio schematic

BOM

NOTE: This is a copy of the BOM.csv file. The shipping cost might be actually higher than the price listed here.

Item	Quantity	LCSC Part Number	Cost EUR	Cost USD	Link
1uF Capacitor	26	C29936	0,25 €	$0,28	https://lcsc.com/product-detail/Multilayer-Ceramic-Capacitors-MLCC-SMD-SMT_Samsung-Electro-Mechanics-CL10B105KA8NNNC_C29936.html
100nF Capacitor	5	C14663	0,22 €	$0,25	https://lcsc.com/product-detail/Multilayer-Ceramic-Capacitors-MLCC-SMD-SMT_YAGEO-CC0603KRX7R9BB104_C14663.html
10uF Electrolytic Capacitor	4	C22387953	0,21 €	$0,24	https://lcsc.com/product-detail/Aluminum-Electrolytic-Capacitors-SMD_FOLLON-EFVH025ADA100M0454_C22387953.html
2.2nF Capacitor	4	C107082	0,23 €	$0,26	https://lcsc.com/product-detail/Multilayer-Ceramic-Capacitors-MLCC-SMD-SMT_YAGEO-CC0603KRX7R9BB222_C107082.html
4.7uF Capacitor	2	C389010	0,30 €	$0,35	https://lcsc.com/product-detail/Multilayer-Ceramic-Capacitors-MLCC-SMD-SMT_muRata-GRM188Z71C475KE21D_C389010.html
27pF Capacitor	2	C376778	0,23 €	$0,26	https://lcsc.com/product-detail/Multilayer-Ceramic-Capacitors-MLCC-SMD-SMT_CCTC-TCC0603COG270J500CT_C376778.html
2.2uF Capacitor	2	C914769	0,43 €	$0,49	https://lcsc.com/product-detail/Multilayer-Ceramic-Capacitors-MLCC-SMD-SMT_YAGEO-CC0603KRX7R7BB225_C914769.html
100pF Capacitor	2	C14858	0,29 €	$0,33	https://lcsc.com/product-detail/Multilayer-Ceramic-Capacitors-MLCC-SMD-SMT_Samsung-Electro-Mechanics-CL10C101JB8NNNC_C14858.html
100uF Electrolytic Capacitor	2	C99837	0,28 €	$0,32	https://lcsc.com/product-detail/Aluminum-Electrolytic-Capacitors-SMD_ROQANG-RVE1V101M0607_C99837.html
3.3uF Capacitor	1	C5360803	0,55 €	$0,63	https://lcsc.com/product-detail/Multilayer-Ceramic-Capacitors-MLCC-SMD-SMT_CCTC-TCC0603X5R335M250CT_C5360803.html
5.1K Resistor	4	C105580	0,11 €	$0,12	https://lcsc.com/product-detail/Chip-Resistor-Surface-Mount_YAGEO-RC0603FR-075K1L_C105580.html
24K Resistor	4	C23352	0,10 €	$0,11	https://lcsc.com/product-detail/Chip-Resistor-Surface-Mount_UNI-ROYAL-0603WAF2402T5E_C23352.html
3.3K Resistor	4	C108078	0,11 €	$0,12	https://lcsc.com/product-detail/Chip-Resistor-Surface-Mount_YAGEO-RC0603FR-073K3L_C108078.html
4.7K Resistor	3	C99782	0,10 €	$0,11	https://lcsc.com/product-detail/Chip-Resistor-Surface-Mount_YAGEO-RC0603FR-074K7L_C99782.html
470 Resistor	3	C114669	0,11 €	$0,12	https://lcsc.com/product-detail/Chip-Resistor-Surface-Mount_YAGEO-RC0603FR-07470RL_C114669.html
0 Resistor	1	C95177	0,10 €	$0,11	https://lcsc.com/product-detail/Chip-Resistor-Surface-Mount_YAGEO-RC0603JR-070RL_C95177.html
10K Resistor	1	C98220	0,10 €	$0,11	https://lcsc.com/product-detail/Chip-Resistor-Surface-Mount_YAGEO-RC0603FR-0710KL_C98220.html
1.5K Resistor	1	C114668	0,11 €	$0,12	https://lcsc.com/product-detail/Chip-Resistor-Surface-Mount_YAGEO-RC0603FR-071K5L_C114668.html
1M Resistor	1	C105578	0,11 €	$0,12	https://lcsc.com/product-detail/Chip-Resistor-Surface-Mount_YAGEO-RC0603FR-071ML_C105578.html
100 Resistor	1	C105588	0,09 €	$0,10	https://lcsc.com/product-detail/Chip-Resistor-Surface-Mount_YAGEO-RC0603FR-07100RL_C105588.html
6.8uH Power Inductor	1	C135295	0,41 €	$0,47	https://lcsc.com/product-detail/Power-Inductors_SXN-Shun-Xiang-Nuo-Elec-SMNR6020-6R8MT_C135295.html
Neopixel	2	C965555	0,36 €	$0,41	https://lcsc.com/product-detail/RGB-LEDs-Built-in-IC_Worldsemi-WS2812B-2020_C965555.html
LED (Green)	1	C965804	0,39 €	$0,44	https://lcsc.com/product-detail/LED-Indication-Discrete_XINGLIGHT-XL-1608UGC-04_C965804.html
XC6220B331MR	2	C86534	0,78 €	$0,89	https://lcsc.com/product-detail/Voltage-Regulators-Linear-Low-Drop-Out-LDO-Regulators_TOREX-XC6220B331MR-G_C86534.html
TS5A22364DGSR	2	C105181	1,22 €	$1,40	https://lcsc.com/product-detail/Analog-Switches-Multiplexers_TI-TS5A22364DGSR_C105181.html
ESP32-WROOM-32E-N8	1	C701342	4,05 €	$4,65	https://lcsc.com/product-detail/WiFi-Modules_ESPRESSIF-ESP32-WROOM-32E-N8_C701342.html
TLP185xSE	1	C7240	0,44 €	$0,51	https://lcsc.com/product-detail/Transistor-Photovoltaic-Output-Optoisolators_TOSHIBA-TLP185-GB-TPL-SE-T_C7240.html
ADUM3160	1	C284149	4,22 €	$4,85	https://lcsc.com/product-detail/Isolated-USB-ICs_ADI-ADUM3160BRWZ-RL_C284149.html
F0505S-3WR2	1	C5369564	1,93 €	$2,22	https://lcsc.com/product-detail/Isolated-Power-Modules_YLPTEC-F0505S-3WR2_C5369564.html
PCM5100APWR	1	C131154	0,74 €	$0,85	https://lcsc.com/product-detail/ADCs-DACs-Special-Purpose_TI-PCM5100APWR_C131154.html
PCM2912APJTR	1	C475497	3,80 €	$4,36	https://lcsc.com/product-detail/Audio-Interface-ICs_TI-PCM2912APJTR_C475497.html
6MHz Crystal	1	C7528811	0,39 €	$0,45	https://lcsc.com/product-detail/Crystals_YXC-Crystal-Oscillators-H6OEL89CSC-SUGYLC-6M_C7528811.html
EC11E18244AU	1	C202365	1,71 €	$1,96	https://lcsc.com/product-detail/Rotary-Encoders_ALPSALPINE-EC11E18244AU_C202365.html
Round TINY SMD Button	2	C720477	0,36 €	$0,41	https://lcsc.com/product-detail/Tactile-Switches_XUNPU-TS-1088-AR02016_C720477.html
Audio Transformer	2	C596483	1,56 €	$1,79	https://lcsc.com/product-detail/Audio-Transformers_Sumida-ESMIT-4180-C_C596483.html
RCA Jack	2	C18080	0,48 €	$0,55	https://lcsc.com/product-detail/RCA-Connector_BOOMELE-Boom-Precision-Elec-AV-5_C18080.html
USBC Power Only	1	C668623	0,31 €	$0,35	https://lcsc.com/product-detail/USB-Connectors_SHOU-HAN-TYPE-C-6P-073_C668623.html
USBC USB2.0	1	C2988369	0,35 €	$0,40	https://lcsc.com/product-detail/USB-Connectors_G-Switch-GT-USB-7010ASV_C2988369.html
Headphone Jack	1	C381131	0,46 €	$0,53	https://lcsc.com/product-detail/Audio-Connectors_XKB-Connection-PJ-3136-B_C381131.html
1.3 Inch OLED 128x64	1	-----	2,80 €	$3,29	https://es.aliexpress.com/item/1005007451015054.html
JLCPCB Echowawa 4 Layer PCB	5	-----	5,95 €	$7,00	-----
M2.5 Heat Inserts OD4mm Length 6mm	4	-----	2,38 €	$2,79	https://es.aliexpress.com/item/1005003582355741.html
M2.5 Allen Bolts 20mm Stainless Steel	4	-----	2,41 €	$2,83	https://es.aliexpress.com/item/32810872544.html
USB to Serial Adapter	1		1,41 €	$1,66	https://es.aliexpress.com/item/1005006445462581.html
~Shipping	-----	-----	15 €	$17,61	-----
TOTAL	-----	-----	57,94 €	$67,22	-----