Davac5: Difference between revisions

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! Modulation relay
! Modulation relay
| Solid SPST
| Solid SPST
| Mechanical SPDT  
| Mechanical SPDT
|-
! Separated grounds
| No
| Yes
|}
|}



Revision as of 21:19, 14 October 2023

Davac 5 is new design of voice/SSB keyer for Tucnak. Although version 5 may appear to be a successor to version 4, is not true. It brings some advantages but also lacks some features.

To choose the version that best suits your requirements, please look at the table:

Davac versions comparsion
Davac 5 Davac 4
Size small bigger
Drivers required No Yes
Isolated No, use the USB isolator Yes
Band output No Yes
USB Micro-B A
Soundcard Is the soundcard itself Uses PC soundcard
Audio cables Shorter Longer
Modulation relay Solid SPST Mechanical SPDT
Separated grounds No Yes

Photos

Recommended assembly is stencil, paste and reflow oven

Features

  • Simple assembly
  • All parts are SMD
  • Designed for SMD reflow
  • 3.5 jacks
  • 3D printed box
  • SMD LEDs + light guides on the top side
  • power supply from USB

Circuit diagram

Circuit diagram of Davac 5.0

Connecting to the radio

  • MOD - modulation output to the microphone input of radio
  • PTT - Push to talk output to switch Radio to the transmit (active low)
  • GND - One ground (ground plane on the bottom layer)