Gaming xHAT V0.1 is a modified Pi-XO Rev. 0.1 PCB for use with Raspberry Pi B an Zero versions. So this is some kind of recycling project, because the Pi-XO is discontinued and some PCB are still around. For all modifications to PCB please see Assembling.
The Game-xHAT can be used for Raspberry Pi Jams, to learn working with Linux and programming practices. It can be used as video player, Controller (Mouse, Joypad), classic game console (see videos), GPIO interaction and more.
The Switch/Button mapping can support Nintendo NES, Gameboy (Color) and Sega Mega Drive layout (Gambatte and PicoDrive Emulator).
The Switch/Button mapping can support mouse input (ScummVM).
- SPI TFT display - 160x128 or 320x240 SPI, CS0
- SPI TFT background LED control GPIO18 (active low)
- SPI TFT display LED voltage monitor MCP3202 (SPI, CS1) CH0
- Speaker Mono audio via GPIO13
- Analog input (wheel) MCP3202 (SPI, CS1) - CH1
- Switches
- 4 x DPAD arranged
- Up - GPIO16
- Down - GPIO21
- Left - GPIO26
- Right - GPIO20
- 4 x free arranged (NES style) + 1 function
- S (S9) - GPIO03
- P (S6) - GPIO19
- O (S8) - GPIO14
- X (S7) - GPIO15
- Fn (S5) - GPIO02
- 4 x DPAD arranged
- LED bar (10 elements)
red - GPIO25 (shared with vibration motor, activation via jumper JP)
red - GPIO17
orange - GPIO18
orange - GPIO27
orange - GPIO22
green - GPIO23
green - GPIO23
green - GPIO24
green - GPIO24
blue - GPIO04 (active on boot) - Vibration motor
GPIO25 (shared with first red LED, activation via jumper JP6)
Order recommendation:
- Drill 4x1,0 mm hole for new switch left top (use 2,5 mm drill to deburring to remove copper)
- TC1262-3.3
- Changed soldering accourding to PCB picture above
- ...
- LED bar (sodering one pin to right like PCB picture above! Check polarity!)
- Resistor array
- 40-pin Header
- User 5-pin header to connect audio amplifier board (do not solder speaker +/-!)
- Use 8-pin IC socket for MCP3202
- Place electrical tape on backside of TFT display sd slot
- TFT display
- Fix speaker with hot glue
- use wires to connect speaker contacts with audio amplifier board
Hints:
- Swiches: Only solder two opposite contacts
- Solder all components (transistors, resistors, capacitors) to backside
- Place electrical tape on left backside of PCB (avoid shortcut with USB connector on Raspberry Pi B)
1 x Female pin header socket 2x20 (JP1) - Adapter for Raspberry Pi B needed
1 x 10-100 KOhm Poti/Trimmer
1 x 2Pin + Jumper or Switch 2-pin (JP6, vibration motor on/off)
1 x 2Pin + Jumper or Switch 2-pin (JP, left red LED on/off)
9 x Tactile switch 6x6mm (S1-S9)
https://www.reichelt.com/at/en/short-stroke-key-6x6-mm-height-5-0-mm-12-v-vertical-taster-9302-p44579.html
1 x Audio amplifier board PAM8302 (JP3, do not connect PAD5 and PAD6)
https://www.ebay.de/sch/i.html?_nkw=PAM8302
1 x TC1262-3.3 - Voltage regulator 3,3 V (JP2)
https://www.conrad.at/de/p/microchip-technology-tc1262-3-3vdb-pmic-spannungsregler-linear-ldo-positiv-fest-sot-223-3-651849.html
1 x Speaker 8 Ohm (connect to amplifier board PAM8302 Output via wire, SP1)
https://www.reichelt.com/at/en/metal-speaker-soldered-connection-lsm-36m-b-p145887.html
https://www.neuhold-elektronik.at/catshop/product_info.php?products_id=6645
1 x LED bar 10 segments - blue orange red (LB10)
https://www.ebay.at/sch/i.html?_trksid=m570.l1313&_nkw=10-Segment+MULTICOLOR+Bar
1 x Resistor array 1K (RN1)
https://secure.reichelt.at/resistor-network-8-res-9-pin-1-0-k-x2126-sil-9-8-1-0k-p18012.html
1 x Vibration motor (JP5)
https://www.neuhold-elektronik.at/catshop/product_info.php?products_id=6971
1 x BC547B transiior (T2)
https://secure.reichelt.at/npn-to-92-transistor-45-v-0-1-a-0-5-w-bc-547b-p5006.html
1 x BC559 transistor (Q2)
https://secure.reichelt.at/bipolartransistor-pnp-30v-0-1a-0-5w-to-92-bc-559c-p219085.html
1 x Resistor 4K7 Ohm (Transistor base vibration motor: R2)
1 x Resistor 270 Ohm (Audio filter: R3)
1 x Resistor 150 Ohm (Audio filter: R4)
5 x Resistor 1K Ohm (protection UART: R5, R6; LED-Bar left right; transistor background LED display: R7)
1 x Capacitor 33 nF (C1)
1 x Electrolytic capacitor 10 uF/6,3 V (C2)
1 x Capacitor 100 nF (C5)
1 x Electrolytic capacitor 1 uF/6,3 V (connected to PAM8302 supply)
1 x MCP3202 - ADC (IC1)
https://www.conrad.at/de/p/microchip-technology-mcp3202-ci-p-datenerfassungs-ic-analog-digital-wandler-adc-extern-pdip-8-651461.html
1 x Diode 1N4001 (D2)
https://secure.reichelt.at/rectifier-diode-do41-50-v-1-a-1n-4001-p1723.html
1 x 1,8" Display 160x128 ST7735 11-pin (JP7) or 8-pin (JP11) - https://www.ebay.de/sch/i.html?_nkw=1.8+128x160+ST7735
2,2" Display 320x240 ILI9341 9-pin (JB8) - https://www.ebay.de/sch/i.html?_nkw=2.2+ILI9341+240x320