iw1au
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Hi to all!
I found a nice relay for RF, with great insolation crosstalk, that I wish to use for my 1.2 GHz band. This relay is double coil 12 V latching, one to be dedicated to TX and the other for RX. I have fortunately the 2 signals TX and RX that remains stable until change of status (if RX is ON, the signal is 12V, while TX is at 0V and viceversa).
The relay absorbes 250 mA that it's not the case to keep supplied, after commutation!
So I need a very simple circuit (no CMOS or IC, possibly) based on RC networks, transistors and ausilliary relays, if needed, in order to generate a positive pulse of 50/100 ms for both coils, syncronized to a simple positive (0 -> 12V) rise front step, keeping in mind that these signals are able to drive the necessary current for the time required directly to the coils.
I hope to have been sufficient clear, being not my mother language!
Thanks for attention.
Gian M., IW1AU
I found a nice relay for RF, with great insolation crosstalk, that I wish to use for my 1.2 GHz band. This relay is double coil 12 V latching, one to be dedicated to TX and the other for RX. I have fortunately the 2 signals TX and RX that remains stable until change of status (if RX is ON, the signal is 12V, while TX is at 0V and viceversa).
The relay absorbes 250 mA that it's not the case to keep supplied, after commutation!
So I need a very simple circuit (no CMOS or IC, possibly) based on RC networks, transistors and ausilliary relays, if needed, in order to generate a positive pulse of 50/100 ms for both coils, syncronized to a simple positive (0 -> 12V) rise front step, keeping in mind that these signals are able to drive the necessary current for the time required directly to the coils.
I hope to have been sufficient clear, being not my mother language!
Thanks for attention.
Gian M., IW1AU