Arpeggiator
About the Arpeggiator PCB
Arpeggiator is an open source PCB design by EwoudVV, published on GitHub. It is a 2-layer board measuring 220 × 170 mm, with 350 components from 192 distinct parts.
Other key parts include the TLC555IDR, MCP100T-450I/TT, 74HC574D,653, 74HC377D,653 and 74HC163D,653. By type, the board carries 121 resistors, 110 capacitors, 59 ICs, 22 diodes, 15 switches and 9 transistors.
From the project
12-note analog arpeggiator with a 1/2/3 octave range, custom pcb and printed case
a standalone arpeggiator made from analog circuits and logic chips. no microcontroller or firmware
there are 12 note switches, arranged like one octave of a piano. turn on the notes in a chord and it plays them in ascending order. a 1/2/3-octave selector sets how many octaves it plays before repeating
with C, E and G selected, the two-octave setting plays C, E, G, then the same notes an octave higher, then starts again
Main components on the Arpeggiator
TLC555IDRMCP100T-450I/TT74HC574D,65374HC377D,65374HC163D,65374HC138D,653CD74HC4067M74HC154D,65374HC74D,65374HC14D,65374HC04D,65374HC08D,65374HC86D,65374HC32D,653OPA4192IDRADG706BRUZ-REEL774HC4051D,653AS3340ATL074HIDRLM13700M/NOPBL7805CVLT1054CPTL431BIDBZRTMUX6219DGKR
Arpeggiator bill of materials (BOM)
350 components, 192 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 3 | TLC555IDR Texas Instruments | SOIC-8_3.9x4.9mm_P1.27mm | U101, U102, U601 |
| 1 | MCP100T-450I/TT Microchip | SOT-23 | U103 |
| 4 | 74HC574D,653 74HC574 Nexperia | SOIC-20W_7.5x12.8mm_P1.27mm | U201, U202, U203, U204 |
| 3 | 74HC377D,653 74HC377 Nexperia | SOIC-20W_7.5x12.8mm_P1.27mm | U205, U206, U221 |
| 4 | 74HC163D,653 74HC163 Nexperia | SOIC-16_3.9x9.9mm_P1.27mm | U211, U213, U214, U215 |
| 1 | 74HC138D,653 74HC138 Nexperia | SOIC-16_3.9x9.9mm_P1.27mm | U212 |
| 1 | CD74HC4067M Texas Instruments | SOIC-24W_7.5x15.4mm_P1.27mm | U216 |
| 1 | 74HC154D,653 74HC154 Nexperia | SOIC-24W_7.5x15.4mm_P1.27mm | U222 |
| 3 | 74HC74D,653 74HC74 Nexperia | SOIC-14_3.9x8.7mm_P1.27mm | U301, U302, U303 |
| 4 | 74HC14D,653 74HC14 Nexperia | SOIC-14_3.9x8.7mm_P1.27mm | U401, U402, U403, U420 |
| 4 | 74HC04D,653 74HC04 Nexperia | SOIC-14_3.9x8.7mm_P1.27mm | U404, U405, U408, U416 |
| 8 | 74HC08D,653 74HC08 Nexperia | SOIC-14_3.9x8.7mm_P1.27mm | U406, U413, U414, U417, U418, U421, U423, U425 |
| 2 | 74HC86D,653 74HC86 Nexperia | SOIC-14_3.9x8.7mm_P1.27mm | U407, U415 |
| 7 | 74HC32D,653 74HC32 Nexperia | SOIC-14_3.9x8.7mm_P1.27mm | U409, U410, U411, U412, U419, U422, U424 |
| 2 | OPA4192IDR Texas Instruments | SOIC-14_3.9x8.7mm_P1.27mm | U501, U602 |
| 1 | ADG706BRUZ-REEL7 ADG706BRUZ Analog Devices | TSSOP-28_4.4x9.7mm_P0.65mm | U502 |
| 1 | 74HC4051D,653 74HC4051D Nexperia | SOIC-16_3.9x9.9mm_P1.27mm | U503 |
| 1 | AS3340A ALFA RPAR | DIP-16_W7.62mm | U504 |
| 1 | TL074HIDR Texas Instruments | SOIC-14_3.9x8.7mm_P1.27mm | U603 |
| 1 | LM13700M/NOPB Texas Instruments | SOIC-16_3.9x9.9mm_P1.27mm | U604 |
Show 172 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | L7805CV STMicroelectronics | TO-220-3_Vertical | U701 |
| 1 | LT1054CP Texas Instruments | DIP-8_W7.62mm | U702 |
| 2 | TL431BIDBZR Texas Instruments | SOT-23 | U703, U704 |
| 1 | TMUX6219DGKR Texas Instruments | VSSOP-8_DGK0008A_TI | U705 |
| 1 | L7905CV STMicroelectronics | TO-220-3_Vertical | U706 |
| 2 | 2N7002,215 2N7002 Nexperia | SOT-23 | Q601, Q605 |
| 2 | MMBT3904,215 MMBT3904 Nexperia | SOT-23 | Q602, Q604 |
| 1 | BSS84,215 BSS84 Nexperia | SOT-23 | Q603 |
| 3 | MMBT3906,215 MMBT3906 Nexperia | SOT-23 | Q606, Q702, Q703 |
| 1 | AO3401A Alpha & Omega | SOT-23 | Q701 |
| 1 | logic test header | PinHeader_1x08_P2.54mm_Vertical | J202 |
| 1 | PJ-3001F 3.5mm mono line out Tayda | Jack_PJ-3001F_Vertical | J601 |
| 1 | PJ-102AH PJ-102AH / 12V DC centre + Same Sky | BarrelJack_CUI_PJ-102AH_Horizontal | J701 |
| 1 | MF-MSMF025-2 MF-MSMF025-2 / 250mA Bourns | Fuse_1812_4532Metric | F701 |
| 1 | RD901F-40-15F-B250K 250k linear Taiwan Alpha | Potentiometer_Alpha_RD901F-40-00D_Single_Vertical | RV101 |
| 1 | 3296W-1-501LF 500 scale Bourns | Potentiometer_Bourns_3296W_Vertical | RV501 |
| 1 | 3296W-1-103LF 10k tempco Bourns | Potentiometer_Bourns_3296W_Vertical | RV502 |
| 1 | 3296W-1-203LF 20k HF track Bourns | Potentiometer_Bourns_3296W_Vertical | RV503 |
| 1 | RD901F-40-15F-B1M 1M decay Taiwan Alpha | Potentiometer_Alpha_RD901F-40-00D_Single_Vertical | RV601 |
| 1 | 3296W-1-104LF 100k offset null Bourns | Potentiometer_Bourns_3296W_Vertical | RV602 |
| 1 | RD901F-40-15F-B100K 100k tone Taiwan Alpha | Potentiometer_Alpha_RD901F-40-00D_Single_Vertical | RV603 |
| 1 | RD901F-40-15F-A100K 100k audio volume Taiwan Alpha | Potentiometer_Alpha_RD901F-40-00D_Single_Vertical | RV604 |
| 1 | RD901F-40-15F-B100K 100k tune Taiwan Alpha | Potentiometer_Alpha_RD901F-40-00D_Single_Vertical | RV605 |
| 1 | 3296W-1-104LF 100k coarse trim Bourns | Potentiometer_Bourns_3296W_Vertical | RV606 |
| 1 | 1MS1T1B1M2QES C Dailywell | SW_Dailywell_1M_SPDT_M2 | SW101 |
| 1 | 1MS1T1B1M2QES C sharp Dailywell | SW_Dailywell_1M_SPDT_M2 | SW102 |
| 1 | 1MS1T1B1M2QES D Dailywell | SW_Dailywell_1M_SPDT_M2 | SW103 |
| 1 | 1MS1T1B1M2QES D sharp Dailywell | SW_Dailywell_1M_SPDT_M2 | SW104 |
| 1 | 1MS1T1B1M2QES E Dailywell | SW_Dailywell_1M_SPDT_M2 | SW105 |
| 1 | 1MS1T1B1M2QES F Dailywell | SW_Dailywell_1M_SPDT_M2 | SW106 |
| 1 | 1MS1T1B1M2QES F sharp Dailywell | SW_Dailywell_1M_SPDT_M2 | SW107 |
| 1 | 1MS1T1B1M2QES G Dailywell | SW_Dailywell_1M_SPDT_M2 | SW108 |
| 1 | 1MS1T1B1M2QES G sharp Dailywell | SW_Dailywell_1M_SPDT_M2 | SW109 |
| 1 | 1MS1T1B1M2QES A Dailywell | SW_Dailywell_1M_SPDT_M2 | SW110 |
| 1 | 1MS1T1B1M2QES A sharp Dailywell | SW_Dailywell_1M_SPDT_M2 | SW111 |
| 1 | 1MS1T1B1M2QES B Dailywell | SW_Dailywell_1M_SPDT_M2 | SW112 |
| 1 | B3F-4055 start / stop Omron | SW_SPST_Omron_B3F-40xx | SW113 |
| 1 | SR2612F-0403-18R0B-D8-N 1 / 2 / 3 octaves Taiwan Alpha | SW_Alpha_SR2612F_4P3T | SW114 |
| 1 | 1MS1T1B1M2QES saw / pulse Dailywell | SW_Dailywell_1M_SPDT_M2 | SW601 |
| 1 | C | LED_0805_2012Metric | D221 |
| 1 | C sharp | LED_0805_2012Metric | D222 |
| 1 | D | LED_0805_2012Metric | D223 |
| 1 | D sharp | LED_0805_2012Metric | D224 |
| 1 | E | LED_0805_2012Metric | D225 |
| 1 | F | LED_0805_2012Metric | D226 |
| 1 | F sharp | LED_0805_2012Metric | D227 |
| 1 | G | LED_0805_2012Metric | D228 |
| 1 | G sharp | LED_0805_2012Metric | D229 |
| 1 | A | LED_0805_2012Metric | D230 |
| 1 | A sharp | LED_0805_2012Metric | D231 |
| 1 | B | LED_0805_2012Metric | D232 |
| 1 | LM4040A25IDBZR Texas Instruments | SOT-23 | D501 |
| 2 | BAT54GW,115 BAT54GW Nexperia | D_SOD-123 | D601, D708 |
| 1 | BZT52-C8V2,115 BZT52C8V2 Nexperia | D_SOD-123 | D701 |
| 1 | SMBJ12A Littelfuse | D_SMB | D702 |
| 3 | SS14-13-F SS14 Diodes Incorporated | D_SMA | D703, D704, D707 |
| 1 | PESD5V0S1BA,115 Nexperia | D_SOD-323 | D705 |
| 1 | BAT54S,215 Nexperia | SOT-23 | D706 |
| 12 | 1u 16V | C_0805_2012Metric | C101, C102, C103, C104, C105, C106, C107, C108 +4 |
| 5 | 100n | C_0805_2012Metric | C130, C140, C141, C501, C532 |
| 1 | 10u 16V | C_0805_2012Metric | C150 |
| 2 | 1n C0G | C_0805_2012Metric | C171, C534 |
| 6 | 10N 10n | C_0805_2012Metric | C172, C182, C531, C533, C602, C634 |
| 1 | MKS4D042204F00KSSD 2.2u film 100V 10% WIMA | C_Rect_L18.0mm_W8.0mm_P15.00mm_FKS3_FKP3 | C181 |
| 5 | 100p C0G | C_0805_2012Metric | C502, C503, C621, C713, C714 |
| 2 | 100n U501 | C_0805_2012Metric | C551, C552 |
| 2 | 100n U504 | C_0805_2012Metric | C553, C554 |
| 2 | 100n U602 | C_0805_2012Metric | C555, C556 |
| 2 | 100n U603 | C_0805_2012Metric | C557, C558 |
| 2 | 100n U604 | C_0805_2012Metric | C559, C560 |
| 1 | 100n U502 | C_0805_2012Metric | C561 |
| 1 | 100n U503 | C_0805_2012Metric | C562 |
| 1 | 100n 5% | C_0805_2012Metric | C601 |
| 1 | R82DC4100DQ60J 1u film 63V 5% KEMET | C_Rect_L7.2mm_W5.0mm_P5.00mm | C603 |
| 1 | 33p C0G | C_0805_2012Metric | C622 |
| 2 | R82EC3100DQ70J 100n film 100V 5% KEMET | C_Rect_L7.2mm_W2.5mm_P5.00mm | C631, C632 |
| 1 | R82DC3470AA60J 470n film 63V 5% KEMET | C_Rect_L7.2mm_W3.5mm_P5.00mm | C633 |
| 1 | 4.7u 25V X7R | C_0805_2012Metric | C635 |
| 1 | 100n U601 | C_0805_2012Metric | C661 |
| 2 | EEU-FR1E101 100u 25V Panasonic | CP_Radial_D6.3mm_P2.50mm | C701, C707 |
| 1 | 330n 50V | C_0805_2012Metric | C702 |
| 2 | 100n 25V | C_0805_2012Metric | C703, C717 |
| 3 | 25YXJ47M5X11 47u 25V Rubycon | CP_Radial_D5.0mm_P2.00mm | C704, C705, C711 |
| 1 | 100n 50V | C_0805_2012Metric | C706 |
| 1 | EEU-FR1E102 1000u 25V Panasonic | CP_Radial_D10.0mm_P5.00mm | C708 |
| 1 | 2n C0G | C_0805_2012Metric | C709 |
| 2 | 100n U705 | C_0805_2012Metric | C715, C716 |
| 1 | 100n U401 | C_0805_2012Metric | C901 |
| 1 | 100n U402 | C_0805_2012Metric | C902 |
| 1 | 100n U101 | C_0805_2012Metric | C903 |
| 1 | 100n U102 | C_0805_2012Metric | C904 |
| 1 | 100n U403 | C_0805_2012Metric | C905 |
| 1 | 100n U404 | C_0805_2012Metric | C906 |
| 1 | 100n U201 | C_0805_2012Metric | C907 |
| 1 | 100n U203 | C_0805_2012Metric | C908 |
| 1 | 100n U205 | C_0805_2012Metric | C909 |
| 1 | 100n U202 | C_0805_2012Metric | C910 |
| 1 | 100n U204 | C_0805_2012Metric | C911 |
| 1 | 100n U206 | C_0805_2012Metric | C912 |
| 1 | 100n U405 | C_0805_2012Metric | C913 |
| 1 | 100n U211 | C_0805_2012Metric | C914 |
| 1 | 100n U212 | C_0805_2012Metric | C915 |
| 1 | 100n U213 | C_0805_2012Metric | C916 |
| 1 | 100n U214 | C_0805_2012Metric | C917 |
| 1 | 100n U215 | C_0805_2012Metric | C918 |
| 1 | 100n U216 | C_0805_2012Metric | C919 |
| 1 | 100n U301 | C_0805_2012Metric | C920 |
| 1 | 100n U406 | C_0805_2012Metric | C921 |
| 1 | 100n U407 | C_0805_2012Metric | C922 |
| 1 | 100n U302 | C_0805_2012Metric | C923 |
| 1 | 100n U408 | C_0805_2012Metric | C924 |
| 1 | 100n U409 | C_0805_2012Metric | C925 |
| 1 | 100n U410 | C_0805_2012Metric | C926 |
| 1 | 100n U411 | C_0805_2012Metric | C927 |
| 1 | 100n U412 | C_0805_2012Metric | C928 |
| 1 | 100n U413 | C_0805_2012Metric | C929 |
| 1 | 100n U414 | C_0805_2012Metric | C930 |
| 1 | 100n U415 | C_0805_2012Metric | C931 |
| 1 | 100n U416 | C_0805_2012Metric | C932 |
| 1 | 100n U417 | C_0805_2012Metric | C933 |
| 1 | 100n U418 | C_0805_2012Metric | C934 |
| 1 | 100n U419 | C_0805_2012Metric | C935 |
| 1 | 100n U420 | C_0805_2012Metric | C936 |
| 1 | 100n U421 | C_0805_2012Metric | C937 |
| 1 | 100n U422 | C_0805_2012Metric | C938 |
| 1 | 100n U423 | C_0805_2012Metric | C939 |
| 1 | 100n U424 | C_0805_2012Metric | C940 |
| 1 | 100n U303 | C_0805_2012Metric | C941 |
| 1 | 100n U425 | C_0805_2012Metric | C942 |
| 1 | 100n U221 | C_0805_2012Metric | C943 |
| 1 | 100n U222 | C_0805_2012Metric | C944 |
| 1 | 100n U103 | C_0805_2012Metric | C945 |
| 25 | 10k | R_0805_2012Metric | R101, R102, R103, R104, R105, R106, R107, R108 +17 |
| 11 | 100k | R_0805_2012Metric | R130, R216, R535, R601, R602, R605, R637, R701 +3 |
| 6 | 1k | R_0805_2012Metric | R131, R628, R632, R634, R635, R636 |
| 1 | 36k | R_0805_2012Metric | R162 |
| 1 | 1.8M | R_0805_2012Metric | R163 |
| 14 | 2.2k | R_0805_2012Metric | R221, R222, R223, R224, R225, R226, R227, R228 +6 |
| 1 | 2.49k | R_0805_2012Metric | R501 |
| 1 | 15k 0.1% 25ppm/C | R_0805_2012Metric | R502 |
| 1 | 10k 0.1% 25ppm/C | R_0805_2012Metric | R503 |
| 4 | RNCF0805TKY10K0 10k 0.01% 25ppm/C Stackpole | R_0805_2012Metric | R504, R505, R621, R624 |
| 12 | 1k 0.1% | R_0805_2012Metric | R511, R512, R513, R514, R515, R516, R517, R518 +4 |
| 4 | RNCF0805TKT100K 100k 0.01% 25ppm/C Stackpole | R_0805_2012Metric | R531, R532, R622, R623 |
| 1 | 360k 0.1% | R_0805_2012Metric | R533 |
| 2 | 1.5M | R_0805_2012Metric | R534, R542 |
| 2 | 470 | R_0805_2012Metric | R536, R543 |
| 1 | 1.5k | R_0805_2012Metric | R537 |
| 1 | 24k | R_0805_2012Metric | R538 |
| 1 | 5.62k 0.1% | R_0805_2012Metric | R539 |
| 1 | 100 0.1% | R_0805_2012Metric | R540 |
| 2 | 1M | R_0805_2012Metric | R541, R629 |
| 1 | 51k | R_0805_2012Metric | R544 |
| 1 | 18.2k 1% | R_0805_2012Metric | R603 |
| 5 | 47k | R_0805_2012Metric | R606, R610, R626, R715, R725 |
| 2 | 220 | R_0805_2012Metric | R607, R611 |
| 1 | 22k | R_0805_2012Metric | R608 |
| 1 | 1.82M 0.1% | R_0805_2012Metric | R620 |
| 2 | 10k 0.1% | R_0805_2012Metric | R625, R639 |
| 1 | 200k | R_0805_2012Metric | R627 |
| 1 | 820k | R_0805_2012Metric | R631 |
| 1 | 1.1M | R_0805_2012Metric | R633 |
| 1 | 6.04k 0.1% | R_0805_2012Metric | R638 |
| 1 | 4.7 0.25W | R_1206_3216Metric | R702 |
| 1 | 20k 0.1% | R_0805_2012Metric | R703 |
| 1 | 174k 0.1% | R_0805_2012Metric | R704 |
| 1 | 33k | R_0805_2012Metric | R706 |
| 2 | 2k 0.1% | R_0805_2012Metric | R711, R722 |
| 1 | 2.32k 0.1% | R_0805_2012Metric | R712 |
| 2 | 330k 0.1% | R_0805_2012Metric | R713, R723 |
| 1 | 6.49k 0.1% | R_0805_2012Metric | R721 |
| 2 | 910 | R_0805_2012Metric | R729, R730 |
Arpeggiator design files
The KiCad project lives in the EwoudVV/arpeggiator repository on GitHub; these links point at the commit this page was built from.
- Layoutarpeggiator.kicad_pcb
- Schematicarpeggiator.kicad_sch
- BOMBOM.csv
Arpeggiator: common questions
How big is the Arpeggiator PCB?
The Arpeggiator measures 220 × 170 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Arpeggiator?
350 components, from 192 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 Arpeggiator design files?
From the EwoudVV/arpeggiator 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 Arpeggiator design in my own project?
The repository has no license, so all rights stay with EwoudVV. Use it as a reference, and ask the author before reusing the design.