à¹‡Here is a Buzzer or beep driver circuit, with the small speakers or tweeters pierce associates. There are several circuits as follows.
Buzzer driver circuit
Door buzzer sound with CD4001 CD4060
The Door buzzer sound circuit was two-tone sound. With the switch S1. working of circuit,The IC1 is a frequency dividing circuit, and generator a sound frequency came out.by the C1, R1 are the frequency generator. This audio signal from pin 7 and pin 4 into the pin 1 and pin 8 of the IC2a, IC2c [...]
Peal from the transistor
Peal from the transistor The work of the circuit,which the Tone audio generatorcircuit will distribute to is 2 part, be first part is will the part frequency generator modern by using transistor 2 pcs. build be frequency generator circuit astable multi vibrator which Q1 and Q2 work alternate. When Q1 work LED1 stick lay part C2 begin charge with [...]
UM66T IC MELODY INTEGRATED CIRCUIT
In the circuit basically usability base IC UM66T use sound of music sweet-sounding origin and be usable easily. It use just integrated one circuit and a loudspeaker , piezo buzzer , the small-sized , and have power supply 3V only. The detail is other of integrated number this circuit. The UM66T series are CMOS LSI [...]