24 Mar
2015
24 Mar
'15
12:47 p.m.
On 24/03/2015, Andre [email protected] wrote:
If fyou are going to homebuild you can skip the whole level shifter and inverter. Just get a usb to ttl cable an attacht the needed connector to the open end of the cable.
Just be aware, as already said the signal is INVERTED so a 1 is a 0 and a 0 is a 1, so the logic level needs to be the opposite of normal RS232 TTL levels, so connecting a standard 5V TTL to a connector probably will not work with a circuit to invert the logic.