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ReadRing

2 years ago 362
  • Description
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  • BOM
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Description

ReadRing prototype PCB This board takes power from nRF52840 Dongle to drive a 80VDC boost converter and control 9 piezoelectric braille actuators by means of Common Emitter / Common Collector Cascades. It receives braille code from smartphone via Bluetooth and can be navigated with 4 buttons. ReadRing is an affordable wearable braille smart device to tackle problems of literacy and accessibility of blind people and promote independent living. See more detail on www.read-ring.com.

Compact_Working_One_2019Sep24_045049PM000_CustomizedView22778162226_jpg.jpg

Documents

Sheet_1

PCB split

BOM

ID Name Designator Footprint Quantity
1 1541141NAA570 Q2,Q1 SMD 3X1 MM PHOTOTRANSISTOR, SIDE VIEW 2
2 80.6K R5 0402 1
3 IR12-21C/TR8 CGQ2,CGQ1 LED SMD 2.4MM SIDE VIEW 2
4 LM3478MMX/NOPB U3 VSSOP-8_L3.0-W3.0-P0.65-LS5.0-BL-EP 1
5 12.1K R6 0201 1
6 300 R11,R10 R0603 2
7 100 R2 RES_0603 1
8 BSC265N10LSFGATMA1 Q22 TDSON-8-1 1
9 BAS16_C179721 D2,D5,D8,D3,D7,D10,D4,D9,D6 SOT-23(SOT-23-3) 9
10 33uH L3 IND-SMD_L6.0-W6.0_FNR60XXS 1
11 BF820 Q17,Q14,Q4,Q5,Q8,Q9,Q16,Q20,Q3,Q10,Q11,Q15,Q19,Q18,Q12,Q13,Q6,Q7 SOT23-3 18
12 33uF C4 CAP_1812 1
13 22850102ANG1SYA02 H4,H3 HDR-TH_2P-P2.54-V-F 2
14 15pF C1 CAP_0402 1
15 4.99M R4 0603 1
16 SKSLLAE010 SW5,SW3,SW9,SW8,SW7,SW6,SW4,SW10 SMD-4.5X2.6X2.2 8
17 12pF C3 0402 1
18 330K R40,R25,R22,R19,R37,R14,R34,R31,R28 1206 9
19 20M R35,R38,R32,R23,R29,R20,R26,R17,R16 1206 9
20 1uF C6,C5 2220 2
21 nRF52840-Dongle U1 NRF52840-DONGLE (CUSTOM) 1
22 10K R13,R12 0603 2
23 Header-Female-2.54_2x14 P3 HDR-TH_28P-P2.54-V-R2-C14-S2.54 1
24 2.7pF C2 0402 1
25 150K R30,R15,R18,R7,R24,R27,R9,R8,R21 0402 9
26 DFLS1200-7 D11 POWERDI-123 1
27 0.24 R1 RES_1210 1
28 5-146868-1 H2,H1 HDR-TH_10P-P2.54-V 2
29 4.99M R3 0402 1

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