
Poly555
oskitone/poly555
The POLY555 is a polyphonic, analog, square wave synth based on the 555 timer chip.

The FSM4JSMATR is a tactile Switche made by TE Connectivity in a SMD-4P,6x6mm package with 4 pins. -40℃~+85℃ 1.6N 100,000 cycles 24V 50mA 5mm 6mm 6mm Gull Wing Round Button SPST-NO Surface Mount,Vertical Without Bracket SMD-4P,6x6mm Tactile Switches ROHS.
PCBKit's library has its KiCad symbol (SW_FSM4JSMATR_SMD:SW_FSM4JSMATR_SMD, from Antmicro) and its footprint (sw-fsm4jsmatr-smd:SW_FSM4JSMATR_SMD, from Antmicro), ready for a KiCad board. 8,733 are in stock at JLCPCB (part C2680629). 15 open-source boards in 13 repositories on GitHub use it.
| Pin | Name | Type |
|---|---|---|
| 1 | 1 | Passive |
| 2 | 2 | Passive |
| 3 | 3 | Passive |
| 4 | 4 | Passive |

oskitone/poly555
The POLY555 is a polyphonic, analog, square wave synth based on the 555 timer chip.







<iframe src="https://pcbkit.io/embed/parts/te/FSM4JSMATR" title="FSM4JSMATR in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe><img src="https://pcbkit.io/embed/parts/te/FSM4JSMATR.jpg" alt="FSM4JSMATR" width="1200" height="900">[](https://pcbkit.io/parts/te/FSM4JSMATR)Yes. The symbol is SW_FSM4JSMATR_SMD:SW_FSM4JSMATR_SMD and the footprint sw-fsm4jsmatr-smd:SW_FSM4JSMATR_SMD, both drawn on this page. PCBKit places them on a board for you when you design with it.
SMD-4P,6x6mm, with 4 pins. Its footprint is drawn on this page.
TE Connectivity publishes it: the Datasheet link on this page opens it.
JLCPCB lists it as part C2680629, with 8,733 in stock; the sellers' links on this page open their listings.
15 boards in 13 repositories on GitHub; the most starred are listed on this page, with their KiCad files.