# improve voltage/current of a square wave signal

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#### Daring

##### New Member
hi,

If i have a square wave signal (10->100hz) from a signal generating source,
is there a simple way to improve the Power of it (Voltage and/or current) with an external circuit?

something like :
starting from a signal like : 0 -> 5v or -2v -> 2v and with simple, easy to find, not too expensise comps
boost the amplitude to 0->10v or -5 -> -5v (which will probably be depending on your external power supply)
but also allow more current to be drained (instead of lets say 20mA 100mA or even more)

i have some transformers from electrical devices that may work as a power source (DC 12V/1A)

its been a while for me and electronics but i think an opamp may do the voltage boost first followed by some current boost circuit.

any suggestions are appreciated.

#### spec

##### Well-Known Member
hi,

If i have a square wave signal (10->100hz) from a signal generating source,
is there a simple way to improve the Power of it (Voltage and/or current) with an external circuit?

something like :
starting from a signal like : 0 -> 5v or -2v -> 2v and with simple, easy to find, not too expensise comps
boost the amplitude to 0->10v or -5 -> -5v (which will probably be depending on your external power supply)
but also allow more current to be drained (instead of lets say 20mA 100mA or even more)

i have some transformers from electrical devices that may work as a power source (DC 12V/1A)

its been a while for me and electronics but i think an opamp may do the voltage boost first followed by some current boost circuit.

any suggestions are appreciated.
Hi Daring,

Off the top of my head:
(1) 0V to 10V at 20mA would be fairly easy (15V @ 500mA power supply required)
(2) 0V to 10V at 100mA would be relatively straight forward (15V at 1A power supply required
(3) -5V to +5V at 20mA not too bad (+12V at 500mA and -12V at 500mA power supplies required)
(4) -5V to +5V at 100mA more difficult (+12V at 1A and -12V at 1A power supplies required)
(5) You have not asked this but, -10 to +10 at 100mA, doable (+15V at 1A and -15V at 1A power suppies required)

To give you an idea of costs, take option (5) above:
(1) 15V at 1A power supply x2: $20US total (2) Case and mechanical parts:$20US
(3) Electronic parts: \$20US

spec

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#### schmitt trigger

##### Well-Known Member
Since you are dealing with such low frequencies, almost any power audio amplifiers would do the job nicely.