Difference between revisions of "PiPicoMite01"

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Line 182: Line 182:
 
** [[GRID49]]
 
** [[GRID49]]
 
* Pinouts
 
* Pinouts
 +
 +
=== Raspberry Pi Pico in a Small Plastic Project Box ===
 +
 +
[[file:Pico_Plastic_Box_P18136_720px.jpg]]
 +
 +
* [[Raspberry_Pi_Pico#In_Small_Plastic_Project_Box|Raspberry Pico on Breadboard]]
 +
 +
=== VGAX49 ===
 +
 +
[[FILE:VGAX49_P901-cropped-720px.jpg]]
 +
 +
* [[VGAX49]]
 +
* Resistors Values
 +
** Selected for 0.7V output on analog RGB pins
 +
** R12 = 270
 +
** R6 = 390
 +
** R7 = 820
 +
** R1 = 270
 +
 +
{| class="wikitable"
 +
!
 +
! R,B
 +
!
 +
! G RES
 +
!
 +
! G
 +
|-
 +
| Rs
 +
| 75
 +
|
 +
| R1
 +
| 390
 +
| 75
 +
|-
 +
| Rm
 +
| 270
 +
|
 +
| R2
 +
| 820
 +
| 264.298
 +
|-
 +
| Vin
 +
| 3.3
 +
|
 +
| RM
 +
| 264.298
 +
| 3.3
 +
|-
 +
| Vout
 +
| 0.717
 +
|
 +
|
 +
|
 +
| 0.729
 +
|-
 +
| I (mA)
 +
| 9.57
 +
|
 +
| I (mA)
 +
|
 +
| 9.73
 +
|-
 +
|}
 +
 +
=== PS2X49 ===
 +
 +
[[FILE:PS2X49_P897_cropped_512pxV.jpg]]
 +
 +
* [[PS2X49]]
 +
* PWR1 is the power to the PS/2 #1, #2 connectors (5V)
 +
* +3.3V powers the TXS0104 translator
 +
* Routing
 +
** CLK1, DAT1 on J3 go to J1 (Purple)
 +
** CLK2, DAT2 on J3 go to J2 (Not used)
 +
 +
[[File:J3-schem.PNG]]
 +
 +
=== SD CARD X49 ===
 +
 +
[[FILE:SDCARDX49_P935_cropped-512px.jpg]]
 +
 +
* [[SD CARD X49]]
 +
* Install NO5V jumper
 +
* Connect 3.3V power
 +
* No 5V attached
 +
* No U2 voltage regulator needed
 +
 +
=== GRID49 ===
 +
 +
[[FILE:GRID49_AUDIO.png]]
 +
 +
* [[GRID49]]
 +
* Audio filter circuit
 +
 +
[[FILE:PiceMite_VGA_Audio.PNG]]
 +
 +
* C1 = Audio_In-L
 +
* D1 - GND
 +
* E1 - Audio_In-R
  
 
=== Cabling ===
 
=== Cabling ===
Line 363: Line 462:
 
|-
 
|-
 
|}
 
|}
−
 
−
=== Raspberry Pi Pico in a Small Plastic Project Box ===
 
−
 
−
[[file:Pico_Plastic_Box_P18136_720px.jpg]]
 
−
 
−
* [[Raspberry_Pi_Pico#In_Small_Plastic_Project_Box|Raspberry Pico on Breadboard]]
 
−
 
−
=== VGAX49 ===
 
−
 
−
[[FILE:VGAX49_P901-cropped-720px.jpg]]
 
−
 
−
* [[VGAX49]]
 
−
* Resistors Values
 
−
** Selected for 0.7V output on analog RGB pins
 
−
** R12 = 270
 
−
** R6 = 390
 
−
** R7 = 820
 
−
** R1 = 270
 
−
 
−
{| class="wikitable"
 
−
!
 
−
! R,B
 
−
!
 
−
! G RES
 
−
!
 
−
! G
 
−
|-
 
−
| Rs
 
−
| 75
 
−
|
 
−
| R1
 
−
| 390
 
−
| 75
 
−
|-
 
−
| Rm
 
−
| 270
 
−
|
 
−
| R2
 
−
| 820
 
−
| 264.298
 
−
|-
 
−
| Vin
 
−
| 3.3
 
−
|
 
−
| RM
 
−
| 264.298
 
−
| 3.3
 
−
|-
 
−
| Vout
 
−
| 0.717
 
−
|
 
−
|
 
−
|
 
−
| 0.729
 
−
|-
 
−
| I (mA)
 
−
| 9.57
 
−
|
 
−
| I (mA)
 
−
|
 
−
| 9.73
 
−
|-
 
−
|}
 
−
 
−
=== PS2X49 ===
 
−
 
−
[[FILE:PS2X49_P897_cropped_512pxV.jpg]]
 
−
 
−
* [[PS2X49]]
 
−
* PWR1 is the power to the PS/2 #1, #2 connectors (5V)
 
−
* +3.3V powers the TXS0104 translator
 
−
* Routing
 
−
** CLK1, DAT1 on J3 go to J1 (Purple)
 
−
** CLK2, DAT2 on J3 go to J2 (Not used)
 
−
 
−
[[File:J3-schem.PNG]]
 
−
 
−
=== SD CARD X49 ===
 
−
 
−
[[FILE:SDCARDX49_P935_cropped-512px.jpg]]
 
−
 
−
* [[SD CARD X49]]
 
−
* Install NO5V jumper
 
−
* Connect 3.3V power
 
−
* No 5V attached
 
−
* No U2 voltage regulator needed
 
−
 
−
=== GRID49 ===
 
−
 
−
[[FILE:GRID49_AUDIO.png]]
 
−
 
−
* [[GRID49]]
 
−
* Audio filter circuit
 
−
 
−
[[FILE:PiceMite_VGA_Audio.PNG]]
 
−
 
−
* C1 = Audio_In-L
 
−
* D1 - GND
 
−
* E1 - Audio_In-R
 
  
 
== Mechanicals ==
 
== Mechanicals ==

Revision as of 16:48, 17 May 2022

PiPicoMite01 FRONT 3D.png

Features

  • Raspberry Pi Pico
    • All pins brought to header
    • Pin marking on rear
  • VGA (1:2:1 - R:G:B)
  • PS/2 Keyboard
    • 5V to keyboard with voltage translator
  • SD Card
    • Full size card
    • Up to 32GB
  • Stereo audio
    • 3.5mm jack
  • 16-bit GPIO
    • MCP23017 port expander
    • I2C1
    • 2x20 0.1" pitch header
    • Jumper selectable terminators
  • Power options
    • 5V power input via USB B or 0.1" pitch header
    • 3.3V output header
  • 120mmx70mm outline
  • (4) 6-32 Mounting holes

Pin Marking on Rear

PiPicoMite01 REAR 3D.png

Schematic

Connectors

GP FUNCTION PICO PIN
GP6 AUDIO-L 9
GP7 AUDIO-R 10
GND AUDIO-GND 8
3.3V PS2_3.3V
VSYS PS2_5V 39
GP8 PS2_CLK 11
GP9 PS2_DATA 12
GND PS2_GND 13
3.3V SD_3.3V
GP12 SD_MISO 16
GP11 SD_MOSI 15
GP10 SD_SCK 14
GP13 SD_SLVSEL 17
GND SD_GND 18
GP18 VGA_BLU 24
GND VGA_GND 23
GP20 VGA_GRN_HI 26
GP19 VGA_GRN_LO 25
GP16 VGA_HSYNC 21
GP21 VGA_RED 27
GP17 VGA_VSYNC 22

H1 - 3.3V Power Out

PiPicoMite01 H1 3p3V.PNG

J1 - SD Card

PiPicoMite01 J1 SD Card.PNG

J2 - USB B Power Connectors

  • Full size USB B connector
  • No USB signal connections, just used for power

J3/J5 Pico Connectors

PiPicoMite01 J4-5 PiPico.PNG

J4 - I2C Terminators

  • Install shunts to terminate SDA, SCL signals

J6 - GPIO

File:PiPicoMite01 J6 GPIO.PNG

J7 - Audio

PiPicoMite01 J7 Audio.PNG

J8 - PS/2 Keyboard

PiPicoMite01 J8 Keyboard.PNG

J9 - 5V Distribution

PiPicoMite01 J9 5V.PNG

J10 - I2C INT

  • Install jumper to connect Interrupt from MCP23017 to GP0 pin on Pico
  • No Pull-up

P1 - VGA

PiPicoMite01 P1 VGA.PNG

Prototype Build

Raspberry Pi Pico in a Small Plastic Project Box

Pico Plastic Box P18136 720px.jpg

VGAX49

VGAX49 P901-cropped-720px.jpg

  • VGAX49
  • Resistors Values
    • Selected for 0.7V output on analog RGB pins
    • R12 = 270
    • R6 = 390
    • R7 = 820
    • R1 = 270
R,B G RES G
Rs 75 R1 390 75
Rm 270 R2 820 264.298
Vin 3.3 RM 264.298 3.3
Vout 0.717 0.729
I (mA) 9.57 I (mA) 9.73

PS2X49

PS2X49 P897 cropped 512pxV.jpg

  • PS2X49
  • PWR1 is the power to the PS/2 #1, #2 connectors (5V)
  • +3.3V powers the TXS0104 translator
  • Routing
    • CLK1, DAT1 on J3 go to J1 (Purple)
    • CLK2, DAT2 on J3 go to J2 (Not used)

J3-schem.PNG

SD CARD X49

SDCARDX49 P935 cropped-512px.jpg

  • SD CARD X49
  • Install NO5V jumper
  • Connect 3.3V power
  • No 5V attached
  • No U2 voltage regulator needed

GRID49

GRID49 AUDIO.png

PiceMite VGA Audio.PNG

  • C1 = Audio_In-L
  • D1 - GND
  • E1 - Audio_In-R

Cabling

FUNCTION GP PICO PIN CARD SIG PIN COLOUR
AUDIO-L GP6 9 GRID49 AUD-L C1 VIO
AUDIO-R GP7 10 GRID49 AUD-GND D1 BLK
AUDIO-GND GND 8 GRID49 AUD-R E1 YEL
PS2_3.3V 3.3V PS2X49 3.3V 4 RED
PS2_5V VSYS 39 PS2X49 PWR1 2 ORG
PS2_CLK GP8 11 PS2X49 CLK1 6 VIO
PS2_DATA GP9 12 PS2X49 DAT1 8 YEL
PS2_GND GND 13 PS2X49 GND 10 BLK
SD_3.3V 3.3V SD_CARD_X49 3.3V 7 RED
SD_MISO GP12 16 SD_CARD_X49 MISO 2 YEL
SD_MOSI GP11 15 SD_CARD_X49 MOSI 4 BLU
SD_SCK GP10 14 SD_CARD_X49 SCLK 3 VIO
SD_SLVSEL GP13 17 SD_CARD_X49 -SDCS 5 GRY
SD_GND GND 18 SD_CARD_X49 GND 1 BLK
VGA_BLU GP18 24 VGAX39 B4 (R12=270) 12 BLU
VGA_GND GND 23 VGAX39 GND 19 BRN
VGA_GRN_HI GP20 26 VGAX39 G5 (R6=390) 6 GRN
VGA_GRN_LO GP19 25 VGAX39 G4 (R7=820) 7 GRN
VGA_HSYNC GP16 21 VGAX39 HS 17 GRY
VGA_RED GP21 27 VGAX39 R4 (R1=270) 1 ORG
VGA_VSYNC GP17 22 VGAX39 VS 18 WHT

Mechanicals

PicoMite01 Rev1 Mechs.PNG

Assembly Sheet

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