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Group Buys and Preorders / Re: [GB] F104+SSK+122+62+77+50+Ergo orders now open! Kishsaver+Industrial Model F
« Last post by Ellipse on Tue, 03 November 2026, 15:45:52 »Future plans:
Here are some future ideas for the forthcoming Model F keyboards and open source Leyden Jar controller revision. Please do post or email me your feedback, or share with your Google form submission at the below link.
The keyboards will all be die cast metal. If you have any suggestions for case designs with mass appeal please let me know.
Please sign the interest form if you have not done so already, for the newer Model F designs (Split Ortho, Planck, Preonic, 6x12, F20, Kinesis Advantage, Unsaver, etc.): https://geekhack.org/index.php?topic=79141.msg3203218#msg3203218
• MCU Replacement: Remove the RP2040 (QFN-56) and PCA9557/PCA9555 IO expander. Upgrade to the new RP2350B (QFN-80).
• Flash Memory: Update the SPI Flash footprint to SOP-8 (208mil) to accommodate the new 8MB ZD25Q64DSIGT chip.
• Dedicated Split Keyboards Header (communicate between halves, one USB cable to computer): Add a new 3-pin through-hole header (VBUS 5V, GND, Data)
• Remove through hole row and column resistors in the 33 pin ribbon cable area if not needed.
Pin-swaps and new pin connections:
• GP26: SOLENOID_ENABLE
• GP27: SOLENOID_PULSE
• GP28: Permanently dedicate to COL16. Do not route this to the expansion header.
• GP29: Permanently dedicate to COL17.
• GP45: UART_DATA (Half-duplex PIO serial).
• Add through holes for the 4 remaining unused pins
• Dedicated pins for the mass-produced 1.47 inch 172x320 SPI display (QMK Quantum Painter compatible) and EC11 rotary encoder with push button.
• Each new Model F keyboard design expected to have this display and rotary encoder.
• Support to connect (through UART) keyboard halves and different keyboards together, so that there's one USB cable to the computer (for example, F20/F50 num pad to another Leyden Jar Rev4 keyboard, etc.). UART support is currently working on the Rev3 but will be updated to separate pins so that solenoids will work at the same time.
• PS/2 support currently working on the current Leyden Jar Rev3; see Rico's keebtalk thread: https://www.keebtalk.com/t/the-leyden-jar-a-tentative-pcb-replacement-for-the-brand-new-model-f-keyboards/17489/9
• The controller currently has I2C (to add LED arrays etc.)
Here are some future ideas for the forthcoming Model F keyboards and open source Leyden Jar controller revision. Please do post or email me your feedback, or share with your Google form submission at the below link.
The keyboards will all be die cast metal. If you have any suggestions for case designs with mass appeal please let me know.
Please sign the interest form if you have not done so already, for the newer Model F designs (Split Ortho, Planck, Preonic, 6x12, F20, Kinesis Advantage, Unsaver, etc.): https://geekhack.org/index.php?topic=79141.msg3203218#msg3203218
• MCU Replacement: Remove the RP2040 (QFN-56) and PCA9557/PCA9555 IO expander. Upgrade to the new RP2350B (QFN-80).
• Flash Memory: Update the SPI Flash footprint to SOP-8 (208mil) to accommodate the new 8MB ZD25Q64DSIGT chip.
• Dedicated Split Keyboards Header (communicate between halves, one USB cable to computer): Add a new 3-pin through-hole header (VBUS 5V, GND, Data)
• Remove through hole row and column resistors in the 33 pin ribbon cable area if not needed.
Pin-swaps and new pin connections:
• GP26: SOLENOID_ENABLE
• GP27: SOLENOID_PULSE
• GP28: Permanently dedicate to COL16. Do not route this to the expansion header.
• GP29: Permanently dedicate to COL17.
• GP45: UART_DATA (Half-duplex PIO serial).
• Add through holes for the 4 remaining unused pins
• Dedicated pins for the mass-produced 1.47 inch 172x320 SPI display (QMK Quantum Painter compatible) and EC11 rotary encoder with push button.
• Each new Model F keyboard design expected to have this display and rotary encoder.
• Support to connect (through UART) keyboard halves and different keyboards together, so that there's one USB cable to the computer (for example, F20/F50 num pad to another Leyden Jar Rev4 keyboard, etc.). UART support is currently working on the Rev3 but will be updated to separate pins so that solenoids will work at the same time.
• PS/2 support currently working on the current Leyden Jar Rev3; see Rico's keebtalk thread: https://www.keebtalk.com/t/the-leyden-jar-a-tentative-pcb-replacement-for-the-brand-new-model-f-keyboards/17489/9
• The controller currently has I2C (to add LED arrays etc.)
