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Multi-channel LED controller, 12V 1A per channel, 1500Hz PWM, RS485/Bluetooth control

1 year ago 1445
  • Description
  • Documents
  • BOM
  • Attachments
  • Members
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Description

Universal board for LED control.

  • Atmega8/328 on board with programming connector
  • PCA9685 for 16 channel PWM up to 1.5kHz (eye-safe frequency), 12 bits per channel
  • cheap ULN2003 with paired outputs for 1A per channel (2-3 meters of RGB 5050 strip per connector)
  • or SOT23 MOSFETs if you need more power
  • BT05 bluetooth module or MAX485, control by wire or wireless. DMX512 is possible.
  • pads for unused Atmega ports, I2C, RX-TX
  • Music spectrum analyser MSGEQ7 on board
  • 3 user-defined buttons, RESET button, 4 status LEDs, 4 user-defined LEDs on board
  • Most parts are optional, solder what you need

Now, rev 1.0 board is manufactured, partially tested and operable:

  • Power connector and 12V to 5V conversion
  • Atmega8 with 16MHz crystal, ISP connector
  • PWM, ULN2003 outputs
  • Onboard LED indication
  • RS485, with PC via USB-RS485 adapter, also tested as DMX-512 slave device
  • MSGEQ7 is operable, but results with microphone are not very good.

Minor bugs found:

  • RS485 indication is inverted in the initial revision
  • RS485 A and B silk marks should be swapped (A is B, B is A).

Documents

Controller

ULN2003 Module

MSGEQ7

Indication

FETs

ULN2003_PCB

BOM

ID Name Designator Footprint Quantity Mounted
1 ATMEGA8 / 328 U1 TQFP-32_7X7X08P 1 Yes C16190
2 MAX485CSA+ MAX485 SOIC-8_150MIL 1 Yes C143494
3 1uF C1,C2,C-485,C3-1 0805 4 Yes C85865
4 RS485 J1 HDR-1X2/2.54 1 Yes C49661
5 CRYSTAL QZ1 CRYSTAL_HC49S 1 Yes
6 15-22pF C1-2,C1-1 0805 2 Yes C90626
7 AVR-ISP ISP1 AVRISP 1 Yes
8 10K R1-12,R1-11,R1-6,R1-7,R1-10,R1-3,R1-4,R1-5,R3-1 0805 9 Yes C144127
9 0.1uF C-MEGA,C-RST,C-AREF,C3-2 0805 4 Yes C85865
10 RESET SW_RESET DIP TACT SWITCH BUTTON 6X6X2MM. 1 Yes C10889
11 Bluetooth HC05/HM1 BLUETOOTH HC05 HM10 1 Yes
12 10KΩ(103) R1-9 0805 1 Yes C144127
13 4.7KΩ(472) R1-8 0805 1 Yes C105427
14 1000uF C3 CAP-D10.0XF5.0 1 Yes C10750
15 330 R1-1,R1-2 0805 2 Yes C104349
16 2.54_1x4 I2C HDR-4X1/2.54 1 Yes C124413
17 LM7805 U2 TO-220 1 Yes
18 JUMPER SJ9,SJ10,SJ1,SJ2,SJ3 SJ_2S 5 Yes
19 PortD PORT-D HDR-6X1/2.54 1 Yes C40877
20 5V 5V HDR-1X2/2.54 1 Yes C49661
21 1N4004 D1 DO-41 1 Yes C169151
22 RS485 J2 TERMINAL BLOCK 2 3.5MM 1 Yes 220-4260
23 Header-Female-2.54_1x4 POWER HDR-4X1/2.54 1 Yes C124413
24 PWR2.5 PWR2 DC-5.5*2.1MM 1 Yes
25 ULN2003 ULN1,ULN2,ULN3,ULN4,ULN5 SOIC-16_150MIL 5 Yes C61273
26 0.5uF C-PCA 0805 1 Yes C85865
27 Header-2.54_1x4 RGB1,RGB2,RGB3,RGB4,RGB5 HDR-4X1/2.54 5 Yes C124413
28 Header-2.54_2x4 RGBW1,RGBW2,RGBW3,RGBW4 HDR-4X2/2.54 4 Yes C124386
29 (0) R4-1,R4-2,R4-3,R4-4,R4-5,R4-6,R4-7,R4-8,R4-9,R4-10,R4-11,R4-12,R4-13,R4-14,R4-15,R4-16 0805 16 Yes C103900
30 SOLDERJUMPER_2WAYS ADR1,ADR0,ADR2,ADR3,ADR4 SJ_3 5 Yes
31 PCA9685 U3 TSSOP-28 1 Yes C92206
32 MSGEQ7 U4 DIP-8 1 Yes C46749
33 200KΩ R3-2 0805 1 Yes C139906
34 33pF C3-4 0805 1 Yes C107115
35 10nF C3-3 0805 1 Yes C129640
36 Header-2.54-1x3 AUDIO2 HDR-3X1/2.54 1 Yes C49257
37 PJ-320B AUDIO1 PJ-320B 1 Yes C18594
38 22K R3-3,R3-4 0805 2 Yes C104117
39 100 R3-5 0805 1 Yes C139906
40 500K R3-6 0805 1 Yes C139906
41 RGB-CommonAnode LED1 RGB-5MM 1 Yes C32985
42 Tact button SW1,SW2,SW3 DIP TACT SWITCH BUTTON 6X6X2MM. 3 Yes C10889
43 47K R2-5,R2-3,R2-1 0805 3 Yes C144127
44 1K R2-11,R2-12,R2-13,R2-14,R2-7,R2-8,R2-9,R2-10,R2-2 0805 9 Yes C163966
45 USER1 LED_U1 CHIPLED_0805 1 Yes
46 USER2 LED_U2 CHIPLED_0805 1 Yes
47 USER3 LED_U3 CHIPLED_0805 1 Yes
48 USER4 LED_U4 CHIPLED_0805 1 Yes
49 PWR LED_PWR CHIPLED_0805 1 Yes
50 RX LED_RX CHIPLED_0805 1 Yes
51 TX LED_TX CHIPLED_0805 1 Yes
52 I2C LED_I2C,LED_RW CHIPLED_0805 2 Yes
53 100Ω R5-1,R5-3,R5-5,R5-7,R5-9,R5-11,R5-13,R5-15,R5-17,R5-19,R5-21,R5-23,R5-25,R5-27,R5-29,R5-31 0805 16 Yes C25277
54 10KΩ R5-2,R5-4,R5-6,R5-8,R5-10,R5-12,R5-14,R5-16,R5-18,R5-20,R5-22,R5-24,R5-26,R5-28,R5-30,R5-32 0805 16 Yes C113193
55 AO3400 Q1,Q2,Q3,Q4,Q5,Q6,Q7,Q8,Q9,Q10,Q11,Q12,Q13,Q14,Q15,Q16 SOT-23(SOT-23-3) 16 Yes C20917

Attachments

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Members

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Comments (4)

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