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Scoreboard Controller

3 years ago 2495
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Eight digit, seven segment LED display driver based on Wemos D1 mini and MAX7219 LED driver chip. The D1 mini is setup as a WIFI access point and webserver. Scoreboard is updated from web interface on mobile device. LED segments are driven at 12V up to 40mA to suit display built from popular LED strip. Arduino sketch and data for scoreboard application is attached.


LED Driver Schematic MAX7219

Scoreboard Schematic



ID Name Designator Footprint Quantity Mounted
1 MAX7219 IC1 DIP24-2.54-30.6X7.62MM 1 Yes C29160
2 470 R1,R2,R3,R4 AXIAL-0.4 4 Yes C58697
3 470 R5,R6,R7,R8 AXIAL-0.4 4 Yes C58706
4 Header-Male-2.54_1x8 JP1,JP2 HDR-8X1/2.54 2 Yes C49256
5 47k R9 AXIAL-0.4 1 Yes C58696
6 74HC540 IC3 DIP20 1 Yes undefined
7 MIC2981 IC2 DIP18 1 Yes undefined
8 100n C3,C4,C1,C6,C7 CERAMIC-2.54 5 Yes C26856
9 ULN2803A IC4 DIP18 1 Yes C5252
10 10uF C2 CAP-D5.0XF2.0 1 Yes C78759
11 Wemos D1 Mini MC1 WEMOS D1 MINI V2 1 Yes
12 Wemos D1 Mini Power Shield MC2 WEMOS D1 MINI DC POWER SHIELD 1 Yes
13 470u C5 CAP-D8.0XF3.5 1 Yes C44593
14 SN74HCT125D IC5 DIP14 1 Yes
15 Header-Male-2.54_1x2 JP3 HDR-2X1/2.54 1 Yes C36717
16 4.7k R11,R10 AXIAL-0.4 2 Yes
17 Header-Male-2.54_1x4 JP4 HDR-4X1/2.54 1 Yes C59481
19 Female headerHDR1X8-2.54 JP1-1,JP2-1 HDR-8X1/2.54 2 Yes C27438
20 2.54-1*2PFemale JP3-1 HDR-1X2/2.54 1 Yes C49661
21 Switch3x4x2 KEY1 KEY-3.0*4.0 1 Yes C26638
22 Female header pitch2.54mm JP4-1 HDR-4X1/2.54 1 Yes undefined
23 DHT12 S1 DHT12 1 Yes undefined


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