Best posts made by ZeeZa

am sorry if i am asking some basic question i still cant get my head wrap around the JTAG pins, let say i have the JTAG in my pcb how will i use the pin to program the device from my Laptop(IDE) or is the Jtag used the same way we use the ESP-01 which we connect to Arduino UNO rx and tx pin before we can upload the code on it?