This circuit produces a tone by a small loudspeaker. Frequency depends on C1 and C2. These capacitors can be changed in the range between 2n2 and 47 nF. T1 is a small output transformer found in old transistor radios. Supply can range from 5 to 9 V.
This circuit produces a tone by a small loudspeaker. Frequency depends on C1 and C2. These capacitors can be changed in the range between 2n2 and 47 nF. T1 is a small output transformer found in old transistor radios. Supply can range from 5 to 9 V.
