Whirlybird: Difference between revisions

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 Also used for [[Instant_Omni_Pro_18_Toaster_Oven_and_Air_Fryer|Singing "QSV" Toaster]]
+= Components =
+== LEDs ==
+=== RGBW 5050 ===
+* [https://cdn-shop.adafruit.com/product-files/2757/p2757_SK6812RGBW_REV01.pdf SK6812RGBW Datasheet (pdf)]
+Note: May not be exact specification match for actual components used
+=== Green 0603 ===
+*Part Number: [https://mm.digikey.com/Volume0/opasdata/d220001/medias/docus/1168/LTST-C193TGKT-5A.pdf LTST-C193TGKT-5A]
+*Digi-Key #: [https://www.digikey.com/en/products/detail/liteon/LTST-C193TGKT-5A/2356246 160-1832-1-ND]
+*Description: LED GREEN CLEAR CHIP SMD
+*Size: 0603, 1.6mm x 0.8mm x 0.45mm
+*Wavelength: 528nm
+These are used for testing and some have been populated at D8-D16. Depending on how many are used they are 0-3 in parallel connected to the PCA9632 driver. Do to the lack of current limiting resistor and the high supply voltage, they tolerated a good level of abuse working out the appropriate PWM control for less than the rated 20mA.
+=== PCA9632 driver ===
+-bit Fm+ I2C-bus low power LED driver
+*I2C Address: 0x62 (98)
+*Type: PCA9632TK
+*Marking: 9632
+*Package: HVSON8
+**plastic thermal enhanced very thin small outline package
+**no leads
+**8 terminals
+**body 3 × 3 × 0.85 mm with 0.5 mm pitch
+*Version: SOT908-1
+This component is placed at <code>U55</code> with <code>LED0, LED1 & LED2</code> connected in groups of up to 3 LEDs in parallel providing a path to ground with the positive side of each LED going directly to >4 volts '''without''' a current limiting resistor. Using a PWM power value of <code>0xF0</code> or less seems to be quite reasonable and it is still quite visible with <code>0x01-0x05</code> as well, at least with the tested [[#Green 0603]] singularly or in a parallel pair.
+Note: Datasheet claims that <code>LEDOUT</code> register supports LEDs are on, off, individual dimming or individual dimming and group dimming/blink. The individual dimming and group control states were only exclusively selectable in testing with bits <code>10, 11</code> for individual vs group control respectively.
+{| class="wikitable"
+|-
+! Name !! Pin !! Type !! Description
+|-
+| LED0 || 1 || Out || LED driver 0
+|-
+| LED1 || 2 || Out || LED driver 1
+|-
+| LED2 || 3 || Out || LED driver 2
+|-
+| LED3 || 4 || Out || LED driver 3
+|-
+| GND || 5 || - || Ground
+|-
+| SCL || 6 || In || I2C Clock
+|-
+| SDA || 7 || In/Out || I2C Data
+|-
+| VDD || 8 || + || Power Supply
+|}
+*https://www.nxp.com/docs/en/data-sheet/PCA9632.pdf
+Minimal test code, demonstrates individual channel dimming and group blink. Green LEDs were added to D8, D11, & D12.
+<pre>
+# PCA9632 I2C 4-Bit LED Driver by DEFAULT
+from machine import Pin, SoftI2C, Timer
+from time import sleep_ms
+# I2C Address for LED Driver for D8-D16
+ADDR = 0x62
+# Register Addresses
+MODE1 = 0x00   # 0x10=on,0x00=sleep
+MODE2 = 0x01   # 0x00=dim,0x20=blink(group)
+# 8-bit individual brightness
+PWM0 = 0x02    # D11,D8,D14
+PWM1 = 0x03    # D9,D10,D12
+PWM2 = 0x04    # D16,D15,D13
+PWM3 = 0x05    # not connected
+# Group control
+GRPPWM = 0x06  # 7-bit
+GRPFREQ = 0x07 # 7-bit
+# 0[1:0],1[3:2],2[5:4],3[7:6]
+# 00=Off,01=On,10=PWMx,11=GRPPWM
+LEDOUT = 0x08
+# Whirlybird I2C (4+ devices connected)
+i2c = SoftI2C(scl=4, sda=5, freq=100_000)
+blinking = True
+def write(reg,val):
+ i2c.writeto_mem(ADDR, reg, bytearray([val]))
+def dim():
+ write(PWM0, 0x05)   # D8 & D11
+ write(PWM1, 0x03)   # D12
+ write(LEDOUT, 0x0A) # Enable PWM0 & PWM1
+ write(MODE2, 0x00)
+def blink():
+ write(GRPPWM,0x0F)  # Group brightness
+ write(GRPFREQ,0x0F) # Group blink rate
+ write(LEDOUT, 0x0F) # Enable DMBLNK
+ write(MODE2, 0x20)
+def toggleMode(t):
+ global blinking
+ if blinking:
+  dim()
+ else:
+  blink()
+ blinking = not blinking
+write(MODE1,0x00)    # Power on Driver
+toggleMode(None)     # Start in Dimming
+</pre>
+[[User:-.-6eau|-.-6eau]] ([[User talk:-.-6eau|talk]]) 00:05, 4 October 2024 (UTC)
 == BOM ==
@@ Line 102: / Line 217: @@
 U53 "F9 NZ" 8 pin lead
 U54 "GEC"
-U55 "9632 78 05 D335" 2x4 no lead package
+U55 PCA9632 "9632 78 05 D335" 2x4 no lead package
 U56 "1C7H 358 AFF 5" 6 pin no lead package
 </pre>