2 layers14.7 × 9.7 mm
2 layers100 × 100 mm
555 Synth
JorisBar/555_SynthA 555 timer based synth and beat generator PCB.
- Size
- 100 × 100 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 97
- Nets
- 54
- Pads
- 278
- Tracks, vias
- 574, 80
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 21 Nov 2025
- Updated
- 4 Dec 2025
Overview
555 Synth is an open-source printed circuit board by JorisBar, from the JorisBar/555_Synth repository on GitHub, published under the MIT licence. It is a 2-layer board of 100 × 100 mm with 97 parts on 54 nets, routed with 574 tracks and 80 vias.
It is built around the TLV61070ADBV and NE555D. Its parts include 32 resistors, 18 capacitors, 12 switches, 7 transistors and 6 ICs. It belongs with the audio and music boards of this library.
Main components
2Parts
97| Qty | Value | Footprint | References |
|---|---|---|---|
| 8 | 21k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R4, R11, R12, R20, R21, R22, R23, R24 |
| 7 | 0.1uF | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C1, C3, C5, C8, C11, C13, C17 |
| 7 | NMOS | Package_TO_SOT_SMD:SOT-23_Handsoldering | Q1, Q2, Q3, Q4, Q5, Q6, Q7 |
| 7 | SW_Push | 1_my_new_library:SW_Push 6x6mm | SW1, SW2, SW3, SW4, SW5, SW6, SW7 |
| 4 | 0.01uF | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C2, C4, C7, C10 |
| 4 | 1.4k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R1, R13, R31, R32 |
| 4 | 10uF | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C6, C9, C12, C15 |
| 4 | 24k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R3, R9, R15, R25 |
| 4 | NE555D | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U1, U2, U3, U4 |
| 3 | 100k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R10, R26, R27 |
| 3 | SW_SPDT | 1_my_new_library:SPDT slide switch THT | SW9, SW11, SW12 |
| 2 | 100R | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R16, R17 |
| 2 | 16k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R7, R28 |
| 2 | 5.1k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R29, R30 |
| 2 | Buzzer | 1_my_new_library:SMD buzzer passive square | BZ1, BZ2 |
| 2 | BuzzerTHT | 1_my_new_library:THT buzzer passive round | BZ3, BZ4 |
| 2 | D | Diode_SMD:D_SOD-123F | D1, D2 |
| 2 | SW_SP3T | 1_my_new_library:SP3T slide switch THT | SW8, SW10 |
| 1 | +5VTP | TestPoint:TestPoint_Pad_1.5x1.5mm | TP6 |
| 1 | +5V_LED | LED_SMD:LED_0603_1608Metric_Pad1.05x0.95mm_HandSolder | D3 |
| 1 | 01x02_Power_Socket | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J2 |
| 1 | 05TimerTP | TestPoint:TestPoint_Pad_D1.5mm | 0.5Hz |
| 1 | 100uF | Capacitor_SMD:CP_Elec_6.3x7.7 | C14 |
| 1 | 14k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R8 |
| 1 | 150TimerTP | TestPoint:TestPoint_Pad_D1.5mm | 150Hz |
| 1 | 17.8k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R6 |
| 1 | 1k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R19 |
| 1 | 2.2uH | 1_my_new_library:SMD 3x3.5mm inductor | L1 |
| 1 | 20k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R5 |
| 1 | 27k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R2 |
| 1 | 2TimerTP | TestPoint:TestPoint_Pad_D1.5mm | 2Hz |
| 1 | 330R | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R18 |
| 1 | 470uF | Capacitor_SMD:CP_Elec_8x10.5 | C18 |
| 1 | 4TimerTP | TestPoint:TestPoint_Pad_D1.5mm | 4Hz |
| 1 | 737pF | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C16 |
| 1 | 8.2k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R14 |
| 1 | 8TimerTP | TestPoint:TestPoint_Pad_D1.5mm | 8Hz |
| 1 | BattPowerTP | TestPoint:TestPoint_Pad_1.5x1.5mm | TP7 |
| 1 | Battery | 1_my_new_library:Battery holder pad and tension release | BT1 |
| 1 | BeatGenPowerTP | TestPoint:TestPoint_Pad_1.5x1.5mm | TP5 |
| 1 | BeatGenPower_LED | LED_SMD:LED_0603_1608Metric_Pad1.05x0.95mm_HandSolder | D4 |
| 1 | GNDTP | TestPoint:TestPoint_Pad_1.5x1.5mm | TP8 |
| 1 | JK flip flop 4027 | Package_SO:SOP-16_4.4x10.4mm_P1.27mm | U5 |
| 1 | SynthTimerTP | TestPoint:TestPoint_Pad_D1.5mm | Synth |
| 1 | TLV61070ADBV | Package_TO_SOT_SMD:SOT-23-6 | U6 |
| 1 | USB_C_6P | 1_my_new_library:USB_C_6P_Connetor | J3 |
Questions
How big is the 555 Synth PCB?
It measures 100 × 100 mm and has 2 copper layers, 1.6 mm thick.
What parts does the 555 Synth use?
97 parts, built around the TLV61070ADBV and NE555D. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the 555 Synth KiCad files?
From the JorisBar/555_Synth repository on GitHub, at the commit this page was made from: the board is 555_Synth.kicad_pcb and its schematic 555_Synth.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the 555 Synth design in my own project?
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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