JMR-800 JX8P Controller Board
About the JMR-800 JX8P Controller Board
JMR-800 JX8P Controller Board is an open source NXP PCB design by calphool, published on GitHub. It is a 2-layer board measuring 93.5 × 124.5 mm, with 57 components from 31 distinct parts.
Its main chip is the TEENSY_PIN_BLK2, from the NXP family. Other key parts include the LM2575-5BT, CD74HC4067M, 74HC595 and LM1117T-3.3. By type, the board carries 17 connectors, 15 resistors, 12 capacitors, 7 ICs, 3 transistors and 1 diode.
It belongs with the retro computing designs in this gallery.
From the project
JMR-800 project, clone of PG-800 hardware
JMR-800 is a modern, open-source clone of the Roland PG-800 hardware programmer, built around the Teensy 4.1 microcontroller. It provides real-time parameter control for vintage Roland synthesizers such as the JX-8P, MKS-70, and JX-10 using the original PG-800 communication protocol.
The JMR-800 replicates the original PG-800's functionality and physical interface, enabling direct, tactile editing of synthesizer parameters through a hands-on control surface.
Main components on the JMR-800 JX8P Controller Board
JMR-800 JX8P Controller Board bill of materials (BOM)
57 components, 31 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | LM2575-5BT | TO-220-5_Vertical | U1 |
| 4 | CD74HC4067M | SOIC-24W_7.5x15.4mm_P1.27mm | U2, U3, U4, U6 |
| 1 | 74HC595 | DIP-16_W7.62mm | U7 |
| 1 | LM1117T-3.3 | TO-220-3_Vertical | U8 |
| 3 | BSS138 | SOT-23 | Q1, Q2, Q3 |
| 1 | DIN-6 | DIN-6 | J1 |
| 1 | POT_CENTERS_1 | PinHeader_1x16_P2.54mm_Vertical | J2 |
| 1 | POT_CENTERS_2 | PinHeader_1x16_P2.54mm_Vertical | J3 |
| 1 | POT_CENTERS_3 | PinHeader_1x16_P2.54mm_Vertical | J4 |
| 1 | TEENSY_PIN_BLK2 | PinHeader_1x07_P2.54mm_Vertical | J5 |
| 1 | TEENSY_PIN_BLK1 | PinHeader_1x06_P2.54mm_Vertical | J6 |
| 1 | TEENSY_PIN_BLK3 | PinHeader_1x09_P2.54mm_Vertical | J7 |
| 1 | GROUNDS | PinHeader_1x09_P2.54mm_Vertical | J8 |
| 1 | POT_POWER_1 | PinHeader_1x02_P2.54mm_Vertical | J9 |
| 1 | POT_POWER_2 | PinHeader_1x02_P2.54mm_Vertical | J10 |
| 1 | POT_POWER_3 | PinHeader_1x02_P2.54mm_Vertical | J11 |
| 1 | POT_POWER_4 | PinHeader_1x02_P2.54mm_Vertical | J12 |
| 1 | POT_CENTERS_4 | PinHeader_1x16_P2.54mm_Vertical | J13 |
| 1 | 3.3V_BUS | PinHeader_1x09_P2.54mm_Vertical | J14 |
| 1 | 5V | PinHeader_1x02_P2.54mm_Vertical | J15 |
Show 11 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 3.3V_ONBOARD_JUMPER | PinHeader_1x02_P2.54mm_Vertical | J16 |
| 1 | LED_REG_CONN | PinHeader_1x08_P2.54mm_Vertical | J17 |
| 1 | 4.1 | Teensy4.1 | TEENSY1 |
| 1 | 1N5819 | D_DO-15_P10.16mm_Horizontal | D1 |
| 1 | 330uH | L_Radial_D12.0mm_P5.00mm_Fastron_11P | L1 |
| 1 | 100uF / 30v | CP_Radial_D10.0mm_P2.50mm | C1 |
| 1 | 330uF | CP_Radial_D10.0mm_P5.00mm | C2 |
| 10 | 0.1uF | C_Disc_D5.0mm_W2.5mm_P2.50mm | C4, C5, C6, C7, C8, C9, C10, C11 +2 |
| 8 | 220 | R_Axial_DIN0204_L3.6mm_D1.6mm_P2.54mm_Vertical | R1, R2, R3, R4, R5, R6, R7, R8 |
| 6 | 10k | R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R9, R10, R11, R12, R13, R14 |
| 1 | 720 | R_Axial_DIN0204_L3.6mm_D1.6mm_P2.54mm_Vertical | R15 |
JMR-800 JX8P Controller Board design files
The KiCad project lives in the calphool/JMR-800 repository on GitHub; these links point at the commit this page was built from.
- LayoutPG800-JMR/PG800-JMR.kicad_pcb
- SchematicPG800-JMR/PG800-JMR.kicad_sch
JMR-800 JX8P Controller Board: common questions
What microcontroller does the JMR-800 JX8P Controller Board use?
The JMR-800 JX8P Controller Board is built around the TEENSY_PIN_BLK2, from the NXP family.
How big is the JMR-800 JX8P Controller Board?
The JMR-800 JX8P Controller Board measures 93.5 × 124.5 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the JMR-800 JX8P Controller Board?
57 components, from 31 distinct parts. The full bill of materials is listed on this page.
Where can I download the JMR-800 JX8P Controller Board design files?
From the calphool/JMR-800 repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the JMR-800 JX8P Controller Board design in my own project?
The repository has no license, so all rights stay with calphool. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the JMR-800 JX8P Controller Board without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug NXP firmware against it before you order a PCB.
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