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STD binary-clock

License: BSD

Mode: Editors' pick

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Update time: 2023-04-29 15:53:02
Creation time: 2020-05-24 09:28:24
Description
This project is a relatively simple binary clock with an ATmega328PB microcontroller and 4x4 matrix of WS2812B RGB LEDs. Features: - RGB LEDs for different colorful display modes - back up battery for time keeping - two usb ports (one on either side) to choose from - temperature and relative humidity measurement - mini speaker for alarm feature - light sensor for automatic brightness - single joystick (TMHU33) as input - simple case design Note the errata in the schematic. I'm not going to update it unless I make a new revision. More details here: https://illsetthislater.blogspot.com/2020/10/binary-clock-part-1.html https://illsetthislater.blogspot.com/2020/10/binary-clock-part-2.html https://illsetthislater.blogspot.com/2020/10/binary-clock-part-3.html
Design Drawing
schematic diagram
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PCB
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ID Name Designator Footprint Quantity
1 CR2032 B1 BATTERY-3 1
2 100n C1,C2,C3,C4,C5,C6,C7,C8,C11,C12,C13,C14,C15,C16,C17,C18,C9,C10,C19,C20,C21,C22,C26,C27 0402 24
3 4u7 C23 0603 1
4 CAP-0603 C24 0603 1
5 22u C25,C28 1210 2
6 diode-0603 D1,D2 0603 2
7 ptc-0805 F1,F2 0805 2
8 SPKR J1 CONNECTOR_2P-2.54 1
9 choke-0603 L1,L2 0603 2
10 WS2812B LED1,LED2,LED3,LED4,LED5,LED6,LED7,LED8,LED9,LED10,LED11,LED12,LED13,LED14,LED15,LED16 LED-5050_4P 16
11 green LED17 0402 1
12 CONNECTOR-AVR-ISP-2X3P P1 CONNECTOR_POGO_2X3P-1.27 1
13 BPW34-S PV1 LED_2-SMD_GULL_WING_4.4X3.85MM 1
14 BSS138PW,115 Q1,Q2 SOT-323(SC-70) 2
15 2k2 R1 0402 1
16 4k7 R2,R3,R4,R5,R11,R16 0402 6
17 10k R6,R7,R8,R9,R10,R13 0402 6
18 47k R12 0402 1
19 1k R14 0402 1
20 RES-0402 R15 0402 1
21 TMHU33 SW1 TMHU33 1
22 RXD TP1 TEST-0805 1
23 TXD TP2 TEST-0805 1
24 GND TP3,TP6 TEST-0805 2
25 VBAT TP4 TEST-0805 1
26 5V TP5 TEST-0805 1
27 ATMEGA328PB-AU U1 TQFP-32_7X7X08P 1
28 MCP1700T-3302E/TT U2 SOT-23(SOT-23-3) 1
29 SHTC3 U3 SHTC1 1
30 micro USB USB1,USB2 MICRO-USB-1 2
31 XTAL-32768HZ Y1 XTAL-8.7X3.8-5.5_LEAD_SPACING 1

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