Study Materials for Amateur Radio Examination (ASOC) in India

Code Practice Oscillator

Here is a simple Morse Code Practice Oscillator using LMC555 or LM555. It generates an audio tone while pressing the Morse key. Frequency of oscillation can be found using following equation, f = 1.44 / [(R1 + 2R2) C], approximately 800Hz for the given values and setting R2 at center

Morse code practice oscillator

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