Phone-Transceiver AFSK Interface
About the Phone-Transceiver AFSK Interface PCB
Phone-Transceiver AFSK Interface is an open source PCB design by 4x1md, published on GitHub under the MIT license. It is a 2-layer board measuring 50 × 50 mm, with 30 components from 21 distinct parts.
By type, the board carries 14 resistors, 8 capacitors, 3 connectors, 2 transistors, 2 diodes and 1 switch.
It belongs with the rf & radio designs in this gallery.
From the project
AFSK interface for Android smartphones and tablets.
This interface board was designed for experimenting with RTTY, SSTV and other digital modes with my Yaesu FT-817ND transceiver using DroidRTTY and DroidSSTV applications on an Android phone.
The idea of this circuit is not new. Many of its variants were published in the internet and the difference between them is relatively small. Usually different versions use different transistors and diodes and some resistors and capacitors values vary but the circuit remains the same.
Phone-Transceiver AFSK Interface bill of materials (BOM)
30 components, 21 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | 2N2222 | TO-92_Molded_Wide_Oval | Q1, Q2 |
| 1 | Phone | PJ320E_Headphones_Plug_Short | J1 |
| 1 | Transceiver | PJ320E_Headphones_Plug_Short | J2 |
| 1 | To TRX Data | Connector_Mini-DIN_Female_6Pin_2rows | P1 |
| 1 | 1200/9600 | Cliff_UT1x_SPDT_ON-ON_Switch_Short | SW1 |
| 2 | BAT46 | Diode_DO-35_SOD27_Horizontal_RM10 | D1, D2 |
| 3 | 4.7uF | CP_Radial_D5.0mm_P2.50mm | C1, C2, C4 |
| 1 | 100uF | CP_Radial_D4.0mm_P2.00mm | C3 |
| 1 | 100uF | CP_Radial_D5.0mm_P2.50mm | C5 |
| 1 | 100n | C_Rect_L7.0mm_W2.5mm_P5.00mm | C6 |
| 2 | 10n | C_Rect_L7.0mm_W2.5mm_P5.00mm | C7, C8 |
| 2 | 33 | R_Axial_DIN0207_L6.3mm_D2.5mm_P2.54mm_Vertical | R1, R2 |
| 1 | 33K | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R3 |
| 1 | 18K | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R4 |
| 1 | 120K | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R5 |
| 1 | 3.3K | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R6 |
| 1 | 120 | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R7 |
| 3 | 1K | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R8, R13, R14 |
| 1 | 10K | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R9 |
| 2 | 10K | Potentiometer_Trimmer_Vertical_Multi_Compatible | R10, R11 |
Show 1 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 470 | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R12 |
Phone-Transceiver AFSK Interface design files
The KiCad project lives in the 4x1md/phone_rtty_interface repository on GitHub; these links point at the commit this page was built from.
Phone-Transceiver AFSK Interface: common questions
How big is the Phone-Transceiver AFSK Interface PCB?
The Phone-Transceiver AFSK Interface measures 50 × 50 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Phone-Transceiver AFSK Interface?
30 components, from 21 distinct parts. The full bill of materials is listed on this page.
Where can I download the Phone-Transceiver AFSK Interface design files?
From the 4x1md/phone_rtty_interface repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the Phone-Transceiver AFSK Interface design in my own project?
Yes, under the terms of its MIT license, which 4x1md chose for the repository.
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