OverCycler 3 board
About the OverCycler 3 board
OverCycler 3 board is an open source NXP PCB design by gligli, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 233.7 × 172.2 mm, with 331 components from 66 distinct parts.
Its main chip is the LPC1778FBD144, from the NXP family. Other key parts include the LM13700, TL064, AD5674R, SSI2144 and MCP4922-ESL. By type, the board carries 152 resistors, 132 capacitors, 23 ICs, 10 connectors, 5 diodes and 2 switches.
It belongs with the audio designs in this gallery.
From the project
Affordable DIY polyphonic hybrid single cycle / analog synthesizer
Affordable DIY polyphonic (6 voices) hybrid single cycle / analog synthesizer
Everything is under GPL v3 license, except files that have their own license in the header.
More details on my synth blog: http://gliglisynth.blogspot.com/search/label/overcycler
Main components on the OverCycler 3 board
OverCycler 3 board bill of materials (BOM)
331 components, 66 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 3 | LM13700 | SO-16_3.9x9.9mm_P1.27mm | IC1, IC2, IC3 |
| 2 | TL064 | SO-14_3.9x8.65mm_P1.27mm | U1, U19 |
| 1 | AD5674R | LFCSP-28-1EP_4x4mm_P0.4mm_EP2.6x2.6mm_ThermalVias | U2 |
| 6 | SSI2144 | SSOP-16_3.9x4.9mm_P0.635mm | U3, U4, U5, U6, U7, U8 |
| 1 | LPC1778FBD144 NXP Semicon | LQFP-144_20x20mm_P0.5mm | U9 |
| 6 | MCP4922-ESL | SO-14_3.9x8.65mm_P1.27mm | U10, U11, U12, U13, U14, U15 |
| 1 | W25Q512JVFIQ | SOIC-16W_7.5x10.3mm_P1.27mm | U16 |
| 1 | 74HC138 | SO-16_3.9x9.9mm_P1.27mm | U17 |
| 1 | TLV2556 | SOIC-20W_7.5x12.8mm_P1.27mm | U18 |
| 1 | ADUM3160 | SOIC-16W_7.5x10.3mm_P1.27mm | U20 |
| 1 | BC856B | SOT-23 | Q1 |
| 1 | 12MHZ 12MHz | Crystal_SMD_ECS_CSM3X-2Pin_7.6x4.1mm | Y1 |
| 1 | DIN-5_180DEGREE DIN-5_180degree | HOOYA DIN-504-M10 | J1 |
| 3 | AUDIOJACK3_SWITCH AudioJack3_Switch | Jack_6.35mm_HOOYA_PJ-609AE_Horizontal | J2, J3, J4 |
| 1 | C720549 USB_B | USB_B_Lumberg_2411_02_Horizontal | J5 |
| 1 | FT232 | PinSocket_1x06_P2.54mm_Vertical | J6 |
| 1 | C157981 Control_Up | JST_PH_B7B-PH-K_1x07_P2.00mm_Vertical | J7 |
| 1 | C2829926 Display | IDC-Header_2x08_P2.54mm_Vertical_Mirrored | J8 |
| 1 | C157972 Keyboard | JST_XH_B8B-XH-A_1x08_P2.50mm_Vertical | J9 |
| 1 | C157981 Control_Down | JST_PH_B7B-PH-K_1x07_P2.00mm_Vertical | J10 |
Show 46 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 6N139 | DIP-8_W7.62mm | OC1 |
| 1 | IA0505S-2W RLT | IA0505S-2W | PS1 |
| 1 | IB0503LSY-1WR1 JETEKPS | IB0503LSY | PS2 |
| 1 | 10K 10k | Potentiometer_Alps_RK163_Dual_Horizontal | RV1 |
| 1 | C390926 POWER | SPUN192600 | SW1 |
| 1 | C393938 RESET | SW_PUSH_6mm | SW2 |
| 5 | 1N4148 | D_SOD-123 | D1, D2, D3, D4, D5 |
| 1 | 10U 10u | L_0805_2012Metric | L1 |
| 2 | 100P 100p | C_0805_2012Metric | C1, C5 |
| 38 | 100NF 100nF | C_0805_2012Metric | C2, C3, C28, C29, C30, C34, C36, C38 +30 |
| 1 | 470UF 470uF | CP_EIA-7343-43_Kemet-X | C4 |
| 2 | 10U 10uF | CP_EIA-3216-18_Kemet-A | C6, C13 |
| 8 | 100U 100u | CP_EIA-3528-21_Kemet-B | C7, C8, C9, C10, C11, C12, C120, C121 |
| 6 | 10NF 10nF | C_0805_2012Metric | C14, C15, C16, C17, C18, C19 |
| 12 | 470N 470n | C_0805_2012Metric | C20, C21, C22, C23, C24, C25, C33, C35 +4 |
| 7 | 47U 47u | C_1206_3216Metric | C26, C58, C59, C60, C61, C62, C63 |
| 16 | 100NF 100n | C_0805_2012Metric | C27, C64, C92, C93, C107, C110, C113, C115 +8 |
| 3 | 22P 22p | C_0805_2012Metric | C31, C32, C119 |
| 18 | 10N 10n | C_0603_1608Metric | C46, C47, C48, C49, C50, C51, C52, C53 +10 |
| 6 | 820P 820p | C_0603_1608Metric | C66, C68, C70, C72, C74, C76 |
| 12 | 22U 22u | C_0805_2012Metric | C87, C88, C89, C90, C91, C94, C95, C96 +4 |
| 1 | 10U 10u | CP_EIA-3216-18_Kemet-A | C118 |
| 4 | 33 | R_0603_1608Metric | R1, R2, R90, R91 |
| 4 | 2K2 2k2 | R_0805_2012Metric | R3, R6, R9, R11 |
| 4 | 47K 47k | R_0805_2012Metric | R4, R12, R15, R21 |
| 7 | 1k | R_0805_2012Metric | R5, R8, R64, R112, R139, R142, R143 |
| 2 | 330 | R_0805_2012Metric | R7, R10 |
| 2 | 56K 56k | R_0805_2012Metric | R13, R19 |
| 2 | 82K 82k | R_0805_2012Metric | R14, R18 |
| 2 | 120K 120k | R_0805_2012Metric | R16, R20 |
| 2 | 33K 33k | R_0805_2012Metric | R17, R22 |
| 6 | 15K 22k | R_0805_2012Metric | R23, R24, R25, R26, R27, R28 |
| 18 | 820 | R_0805_2012Metric | R29, R32, R33, R36, R37, R40, R99, R100 +10 |
| 20 | 4K7 4k7 | R_0805_2012Metric | R30, R31, R34, R35, R38, R39, R48, R51 +12 |
| 1 | 220 | R_0805_2012Metric | R41 |
| 15 | 470 | R_0805_2012Metric | R42, R43, R44, R45, R46, R47, R49, R50 +7 |
| 14 | 10K 10k | R_0805_2012Metric | R60, R68, R72, R76, R80, R84, R88, R89 +6 |
| 1 | 270 | R_0805_2012Metric | R63 |
| 6 | 390 | R_0805_2012Metric | R65, R69, R73, R77, R81, R85 |
| 6 | 6K8 6k8 | R_0805_2012Metric | R66, R70, R74, R78, R82, R86 |
| 31 | 15K 15k | R_0805_2012Metric | R67, R71, R75, R79, R83, R87, R105, R106 +23 |
| 1 | 220K 220k | R_0805_2012Metric | R138 |
| 1 | 1M | R_0805_2012Metric | R141 |
| 1 | 1K5 1k5 | R_0603_1608Metric | R144 |
| 1 | 100K 100k | R_0805_2012Metric | R145 |
| 1 | 3M3 | R_0805_2012Metric | R147 |
OverCycler 3 board design files
The KiCad project lives in the gligli/overcycler repository on GitHub; these links point at the commit this page was built from.
OverCycler 3 board: common questions
What microcontroller does the OverCycler 3 board use?
The OverCycler 3 board is built around the LPC1778FBD144, from the NXP family.
How big is the OverCycler 3 board?
The OverCycler 3 board measures 233.7 × 172.2 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the OverCycler 3 board?
331 components, from 66 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the OverCycler 3 board design files?
From the gligli/overcycler repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the OverCycler 3 board design in my own project?
Yes, under the terms of its GPL-3.0 license, which gligli chose for the repository.
Can I test firmware for the OverCycler 3 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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