PTT-USB-Cable
About the PTT-USB-Cable PCB
PTT-USB-Cable is an open source PCB design by UT8IFG, published on GitHub under the MIT license. It is a 2-layer board measuring 30 × 13.7 mm, with 23 components from 15 distinct parts.
Other key parts include the CP2102, USBLC6-2SC6 and EL357N. By type, the board carries 9 resistors, 4 capacitors, 3 ICs, 2 transistors, 2 connectors and 1 diode.
It belongs with the rf & radio and usb & debug tools designs in this gallery.
From the project
A simple galvanically isolated USB-PTT interface for amateur radio equipment
The USB PTT Cable is a simple galvanically isolated USB-PTT interface for amateur radio equipment. It was originally designed as a USB-PTT interface for the PA Controller (manufactured by VHFDesing.com) to allow operation in digital modes.
The basic idea is to use a plastic housing and a 4-wire cable of USB-UART converters sold on Aliexpress and other marketplaces as parts of the USB PTT Cable. This makes it easier and cheaper to build the device at home.
Main components on the PTT-USB-Cable
PTT-USB-Cable bill of materials (BOM)
23 components, 15 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | CP2102 | QFN-28-1EP_5x5mm_P0.5mm_EP3.35x3.35mm_ThermalVias | U1 |
| 1 | USBLC6-2SC6 | SOT-23-6 | U2 |
| 1 | EL357N | SOP-4_3.8x4.1mm_P2.54mm | U3 |
| 2 | BC817 | SOT-23 | Q1, Q2 |
| 1 | USB_A | USB_A_CNCTech_1001-011-01101_Horizontal_TH | J1 |
| 1 | Cable | PinHeader_1x04_P2.54mm_NoSilk | J2 |
| 2 | MountingHole | Hole | H1, H2 |
| 1 | LED_Dual_CAC | LED_D3.0mm-3 | D1 |
| 1 | 1u | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1 |
| 3 | 100n | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C2, C3, C4 |
| 1 | 4.7k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1 |
| 2 | 1k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R2, R4 |
| 2 | 10k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R3, R6 |
| 3 | 200 | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R5, R7, R8 |
| 1 | 470 | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R9 |
PTT-USB-Cable design files
The KiCad project lives in the UT8IFG/PTT-USB-Cable repository on GitHub; these links point at the commit this page was built from.
- LayoutPTT-USB-Cable.kicad_pcb
PTT-USB-Cable: common questions
How big is the PTT-USB-Cable PCB?
The PTT-USB-Cable measures 30 × 13.7 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the PTT-USB-Cable?
23 components, from 15 distinct parts. The full bill of materials is listed on this page.
Where can I download the PTT-USB-Cable design files?
From the UT8IFG/PTT-USB-Cable repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the PTT-USB-Cable design in my own project?
Yes, under the terms of its MIT license, which UT8IFG chose for the repository.
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