3rd Overtone Radio Controller Crystal Oscillator circuit 27MHz RC Transmitter Part 2











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Colpitts Oscillator with 27MHz Overtone Crystal that is used for radio transmitter for radio control cars. Practical example of how to get a 3rd overtone crystal to oscillate correctly on the overtone. • 00:28 Example application: Arduino controller for radio control car. • 00:45 How to purchase a crystal • 01:00 Datasheet • 01:24 Circuit diagram (for natural frequency) • 02:29 Assembled circuit on breadboard (for natural frequency) • 02:53 Working but not at the desired frequency • 03:01 Overtone explanation • 03:25 Circuit modification for (Overtone vibration) • 03:45 Component values • 04:05 Fully assembled circuit testing • 04:15 Success

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