2 layers49 × 82.3 mm
2 layers69 × 28.5 mm
GR DTMF Decoder
GadgetReboot/DTMF_Decoder9MT8870 DTMF decoder for POTS phone line interfacing
- Size
- 69 × 28.5 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 15
- Nets
- 20
- Pads
- 51
- Tracks, vias
- 76, 0
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 14 Aug 2022
- Updated
- 17 Aug 2022
Overview
GR DTMF Decoder is an open-source printed circuit board by GadgetReboot, from the GadgetReboot/DTMF_Decoder repository on GitHub. It is a 2-layer board of 69 × 28.5 mm with 15 parts on 20 nets, routed with 76 tracks and 0 vias.
It is built around the MT8870DS1. Its parts include 3 capacitors, 3 resistors, 3 connectors, 1 IC and 1 crystal.
Main components
1README
KiCad/readme.mddesign files
Parts
15| Qty | Value | Footprint | References |
|---|---|---|---|
| 2 | 100K | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R1, R2 |
| 2 | 100nF | Capacitor_THT:C_Disc_D4.7mm_W2.5mm_P5.00mm | C2, C3 |
| 2 | 3V3 | Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal | Z1, Z2 |
| 2 | Conn_01x02 | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J1, J2 |
| 1 | 0.56uF 250V | Capacitor_THT:C_Rect_L16.5mm_W5.0mm_P15.00mm_MKT | C1 |
| 1 | 3.579545 MHz | Crystal:Crystal_HC49-4H_Vertical | Y1 |
| 1 | 300K | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R3 |
| 1 | 600:600 | Transformer_THT:Transformer_NF_ETAL_P3324 | T1 |
| 1 | Conn_01x07 | Connector_PinHeader_2.54mm:PinHeader_1x07_P2.54mm_Vertical | J3 |
| 1 | LOGO | _Custom_Footprints:pcb way logo | G*** |
| 1 | MT8870D | Package_DIP:DIP-18_W7.62mm | U1 |
Questions
How big is the GR DTMF Decoder PCB?
It measures 69 × 28.5 mm and has 2 copper layers, 1.6 mm thick.
What parts does the GR DTMF Decoder use?
15 parts, built around the MT8870DS1. 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 GR DTMF Decoder KiCad files?
From the GadgetReboot/DTMF_Decoder repository on GitHub, at the commit this page was made from: the board is KiCad/GR_DTMF_Decoder.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the GR DTMF Decoder design in my own project?
Its repository states no licence, so its author keeps all rights: ask GadgetReboot before reusing the design.
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