If you don't need USB control look here
UP for sale event sequencer for proper RX to TX transition, and the return to
RX mode. This sequencer based on modern STM8s CPU. Internal CPU clocking
guaranteeshigh precision and long-term stability, NO CAPACITOR, no external
timing network, everything is digital.Sequencer has four high current MOSFET
switches on output, they switching in 3 step (stage) with delay. Delay time can
be selected by onboard jumper from two values - 15ms or 45ms.Three of MOSFET
output port is "OPEN DRAIN" and "ground" active. Fourth MOSFET output port has
external DC +12-30 input line (+IN) that switched ON (to +OUT line) in RX mode
and has same timing diagram as stage3.
Output ports not protected, just bare DRAINS, so - be carefull, don't forget
to use diodes in parallel with relay coils.
Sequencer can be switched to TX or RX mode by two ways - by external
footswitch or from USB. You can use USB TX/RX switching from PC with any
amateur radio software via RTS signal of virtual COM port. Sequencer uses
CP2102 as USB to COM interface anddoesn't require a manual Windows (for Windows
VISTA and later) driver installation.
Board size is 65 x 50 mm
Output ports: 4ports, 50v/3a max
Input ports: Footswitch, USB
Delay time: 15 ms or 45 ms, onboard jumper selectable
DC input: +9-24v/0.1A max
We ship worldwide from Ukraine by Registered Air mail with tracking number.
Your item will be shipped next business day once payment received. Delivery
time depends on destination and Customs, usually it takes about 20-25 business