kv4p HT - ESP-WROOM-32

Completed

STD kv4p HT - ESP-WROOM-32

Arduino

Communication

Radio_Frequency

License: GPL 3.0

Mode:

Editors' pick

Cloned from KV4P HT

Update time： 2024-10-09 02:03:52

Creation time： 2024-04-12 17:36:52

Description

See the project website for details: https://kv4p.com

kv4p HT is a homebrew VHF radio that makes your phone capable of voice and text communication completely off-grid with at least a Technician class amateur radio license.

The radio simply plugs into the USB C port on your Android smartphone and transforms it into a fully-fledged handheld radio transceiver. It's completely open source (GPL3): the Android app, ESP32 firmware, PCB designs, and 3D printer files.

It's small enough to fit in your pocket and take anywhere, and since it has no internal battery it's the perfect emergency radio to put in a go-bag or your car's glove compartment.

Design Drawing

schematic diagram

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PCB

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PCB_KV4P HT - ESP-WROOM-32
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BOM

BOM download Purchase Parts

ID	Name	Designator	Footprint	Quantity
1	24pF	C5,C6	C0402	2	C147433
2	47pF	C1,C4	C0603	2	C725574
3	75nH	L1,L3	IND-SMD_L2.9-W2.5	2	C251931
4	82nH	L2	IND-SMD_L2.9-W2.8	1	C346434
5	SMA	J1	CON-SMA-RA	1
6	DRA818V	U1	DRA818V_DORJI_DRA818V	1
7	ESP32-WROOM-32 DEVELOPMENT BOARD	U5	ESP32-WROOM-32 DEVELOPMENT BOARD	1
8	1MΩ	R1	R0805	1	C413339