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Archives for May, 2010

RF power amp

100 W LDMOS RF power transistor circuit for broadcast transmitter applications S-band radar applications in the 2.9GHz to 3.3GHz frequency range using BLS2933-100 100 W LDMOS RF power amp using transistor for broadcast transmitter applications, S-band radar applications in the 2.9GHz to 3.3GHz frequency range using BLS2933-100 100W LDMOS power transistor for S-band radar applications […]

60W Power Audio Amplifier circuit using LM1875

60W Power Audio Amplifier circuit using LM1875 60W Power Audio Amplifier circuit using LM1875 The following circuit diagram is the 60 Watt power audio amplifier circuit, build based on power amp chip LM1875. The single chip of IC LM1875 is able to amplify the audio power output up to 60W. In this circuit, the two […]

DTMF control RELAY SWITCHING circuit using M8870, 4013, BC548

DTMF control RELAY SWITCHING circuit using M8870, 4013, BC548

Touch switch Circuit using 555

Touch switch Circuit using 555

Electronic Circuit ding-dong Sound for any Alarm

Electronic Circuit ding-dong Sound for any Alarm Basically the circuit alternates between two frequencies which are adjustable. This produces the “ding-dong” sound.

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