Dragon Tamer
Member
I was thinking of making a scale working model of a WWII battle ship (I haven't decided which one yet, but the Bismark is a good candidate).
There are just a few questions that I had and was hoping that someone could help me.
My first question, I wanted the transmitter to operate at roughly 4MHz because both the transmitter and the receiver use a 4017 as the channel selector and since the 4017 has a max frequency of 5MHz. Do I need a carier frequency or can I just transmit the 4MHz directly?
Second, if I do need a carrier frequency, which do you recommend AM or FM carrier? I know that most modern RC transmitters use FM coupled with a crystal to control frequency.
Finally, I wanted to add a simple sonar to the model to find out if it's heading into shallow water. What I was going to do for this was an array of simple circuits operating at a 10MHz frequency. I've attached a schematic, if someone could just look over that and tell me if I got it right.
There are just a few questions that I had and was hoping that someone could help me.
My first question, I wanted the transmitter to operate at roughly 4MHz because both the transmitter and the receiver use a 4017 as the channel selector and since the 4017 has a max frequency of 5MHz. Do I need a carier frequency or can I just transmit the 4MHz directly?
Second, if I do need a carrier frequency, which do you recommend AM or FM carrier? I know that most modern RC transmitters use FM coupled with a crystal to control frequency.
Finally, I wanted to add a simple sonar to the model to find out if it's heading into shallow water. What I was going to do for this was an array of simple circuits operating at a 10MHz frequency. I've attached a schematic, if someone could just look over that and tell me if I got it right.