Tag Archives: BC547 transistors

Video amplifier splitter by transistor BD137-BC547-BC557

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This is the video amplifier circuit or the video splitter circuit, it is designed to take video signal is stronger. Compensate for the loss of signal, and is video splitter video, which can connect up to three outputs. so is suitable for display on several television screens, or video tapes… Read more »

Computer Microphone by BC547

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This circuit was submitted by Lazar Pancic from Yugoslavia. The sound card for a PC generally has a microphone input, speaker output and sometimes line inputs and outputs. The mic input is designed for dynamic microphones only in impedance range of 200 to 600 ohms. Lazar has adapted the sound… Read more »

Simple preamplifier circuits by transistors

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If we want good quality sound system,the first thing to consider is that a good pre-amp. Some people say that’s not necessary. But when the low-level audio source. We may need to adjust the sound too high will cause distortion. so should have the preamplifier to amplify a signal up… Read more »

Simple preamplifier circuits by transistors

Schematic Diagrams      Comments Off on Simple preamplifier circuits by transistors

If we want good quality sound system,the first thing to consider is that a good pre-amp. Some people say that’s not necessary. But when the low-level audio source. We may need to adjust the sound too high will cause distortion. so should have the preamplifier to amplify a signal up… Read more »

Simple preamplifier circuits by transistors

Schematic Diagrams      Comments Off on Simple preamplifier circuits by transistors

If we want good quality sound system,the first thing to consider is that a good pre-amp. Some people say that’s not necessary. But when the low-level audio source. We may need to adjust the sound too high will cause distortion. so should have the preamplifier to amplify a signal up… Read more »

Simple preamplifier circuits by transistors

Schematic Diagrams      Comments Off on Simple preamplifier circuits by transistors

If we want good quality sound system,the first thing to consider is that a good pre-amp. Some people say that’s not necessary. But when the low-level audio source. We may need to adjust the sound too high will cause distortion. so should have the preamplifier to amplify a signal up… Read more »

Simple preamplifier circuits by transistors

Schematic Diagrams      Comments Off on Simple preamplifier circuits by transistors

If we want good quality sound system,the first thing to consider is that a good pre-amp. Some people say that’s not necessary. But when the low-level audio source. We may need to adjust the sound too high will cause distortion. so should have the preamplifier to amplify a signal up… Read more »

Simple Signal injector by transistor

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One of my friends is an electronic technician amateur in repairing of television or radio receivers. He said he is made a signal injector circuit to detect the signal in various sectors. For example: in the sector amplifier, when the input signal of this circuit, if the amplifier is good,… Read more »