Hello
I have a similar request to this old thread:
http://forum.allaboutcircuits.com/t...quency-audio-amp-circuit-1-hz-to-25-hz.29597/
I need to drive an electro magnet with a variable sine in the 4 to 20 Hz range, with a power up to 1000w. (the solenoid will be designed later trying to match the amplificator accepted impedance)
I dont want to buy a lab power supply (too expensive), VFDs are cheap (100 USD) but none can supply a single phase load ( they are all 3 phases or 2 phases supply).
Then I've looked at the audio amplifiers but they dont seem to go below 20Hz.
I dont need "HI-FI" signal but rather a way to get a cheap and powerful amplification in the 2Hz to 20Hz range, it could be controlled for example by a line audio signal (but I dont know if a sound card can supply such frequency) or by an IC. Could you point me towards a chip or a circuit design ?
Thank you very much
I have a similar request to this old thread:
http://forum.allaboutcircuits.com/t...quency-audio-amp-circuit-1-hz-to-25-hz.29597/
I need to drive an electro magnet with a variable sine in the 4 to 20 Hz range, with a power up to 1000w. (the solenoid will be designed later trying to match the amplificator accepted impedance)
I dont want to buy a lab power supply (too expensive), VFDs are cheap (100 USD) but none can supply a single phase load ( they are all 3 phases or 2 phases supply).
Then I've looked at the audio amplifiers but they dont seem to go below 20Hz.
I dont need "HI-FI" signal but rather a way to get a cheap and powerful amplification in the 2Hz to 20Hz range, it could be controlled for example by a line audio signal (but I dont know if a sound card can supply such frequency) or by an IC. Could you point me towards a chip or a circuit design ?
Thank you very much