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STD Multi-channel LED controller, 12V 1A per channel, 1500Hz PWM, RS485/Bluetooth control
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License: CC-BY-SA 3.0
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).
Design Drawing
schematic diagram
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Controller
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ULN2003 Module
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MSGEQ7
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Indication
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FETs
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PCB
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| 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 |
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