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ESP-01S PCA9685 RGBWW LED-driver

9 months ago 76
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Description

PCA9685 outputs is shift level with NPN-transistor to 12V (inverted so short single blink while booting ESPhome). Used transistor to fully open Mosfet otherwise it would generate a lot of heat. Nowq it keeps quite cool; ambient + few degrees. Would advice to ditch the linear voltage regulators though. 3.3V gets quite hot so dissipates amps. Not efficient. Or redesign +3.3V (and +5V) linear regulators or solder/hack swith mode power supply (those tiny Aliexpress regulators you can solder need voltage and cut pot trace (HW-613)). 

 

PWM Ouputs of PCA9685 are near Input pins of 2N3904 transistors. You need to run short wires. The up side is you can buy complete module (like https://www.aliexpress.com/popular/pca9685.html )

Documents

Sheet_1

PCB_V1.0_01022021

BOM

ID Name Designator Footprint Quantity
1 10uF C1 CAP-TH_BD6.3-P2.50-D1.0-FD 1
2 100uF C4 CAP-TH_BD6.3-P2.50-D1.0-FD 1
3 100nF C2,C3,C5,C6 RAD-0.2 4
4 EK508V-06P CN1 CONN-TH_EK508V-06P 1
5 DC005-2.0MM DC2 DC-IN-TH_DC005 1
6 Header-Male-2.54_1x5 H1,H2 HDR-TH_5P-P2.54-V-M 2
7 Header-Male-2.54_1x8 H3 HDR-TH_8P-P2.54-V-M 1
8 φ3 Red LED1 LED-TH_BD3.5-P2.54-FD 1
9 2N3904 Q1,Q3,Q5,Q8,Q10 TO-92-3_L5.1-W4.1-P1.27-L 5
10 R Q2,Q4,Q6,Q7,Q9 TO-220-3_L10.0-W4.5-P2.54-T 5
11 10k R1,R2,R4,R6,R9 AXIAL-0.4 5
12 1k R3,R5,R7,R8,R10,R11 AXIAL-0.4 6
13 PCA9685 U1 PCA9685 1
14 ESP-01 U3 WIFIM-TH_8P-L24.7-W14.4-P2.54 1
15 282880-2 U4 CONN-TH_2P-P5.00_282880-2 1
16 LD1117v33 U5 LD1117V33 1
17 LM7805 U6 TO-220-3_L10.0-W4.5-P2.54-L 1

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