Ask help from generaing a square wave by another square wave

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bhl777

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Hi guys, could you help me to solve this problem? I have a square wave whose amplitude is 3V, and I want to use a 28V DC supply and some resistors, could you tell me how can I use the 3V input square wave to generate a 28V sqaure wave just using the resistors? I have tried to use the pull-up resistor but it is not OK. The detailed picture is in the attachment! Thank you so much!
 

is a tranistor ok?
then how about switching the voltage level useing a transitor.?
 

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    bhl777

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Re: Ask help from generaing a square wave by another square

Use 2 cascaded transistors switches as shown in attached schematic.
Transistors can be any general purpose NPN like BC547.
 

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    bhl777

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Re: Ask help from generaing a square wave by another square

cameo_2007 said:
is a tranistor ok?
then how about switching the voltage level useing a transitor.?
Click to expand...

Thank you man, you really help me!

Added after 18 seconds:

CMOS said:
Use 2 cascaded transistors switches as shown in attached schematic.
Transistors can be any general purpose NPN like BC547.
Click to expand...

Thank you man, you really help me!
 

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