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Topic: ultrasounds to send and receive Morse code (Read 1 time) previous topic - next topic

Grumpy_Mike

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those 40 khz should I play with them through pwm

Yes I would.

The transmitter just replace the crystal oscillator circuit with the aduino.

The receiver looks fine.

kourpetis

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The transmitter just replace the crystal oscillator circuit with the aduino.


that's the 40khz in between the 2 capasitors 22 and 20 pf . right ?

Grumpy_Mike

Feed the arduino into pins 3 and 5 of U1, remove everything to the left of this.

kourpetis

First of all thank you very much for your quick responses.

correct me if I am wrong but I sent every thing from one pin on the arduino ( my output pin ), those are two should I just split that wire that is connected to arduino output pin and connect it to both pins ? am i missing something here ?

Grumpy_Mike

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those are two should I just split that wire that is connected to arduino output pin and connect it to both pins

Well i would take the wire to one pin and then another wire between the two pins. Splitting is not what you do. It matters not what order is goes in so long as all the three points are connected together.

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