Hey guys,
I'm planning on building a TDA7294 circuit (http://www.st.com/stonline/books/pdf/docs/1057.pdf)
I've been playing around with smaller amps such as the tda2050 and tda2030 but so far I have just been using batteries to power them. I recently found an old wall unit that used a transformer, rectifiers, and a capacitor to drop the voltage from 120VAC to about 10VDC and I hooked this up to a TDA2030 and it works fine... But I'm kinda confused about the +40,-40, and ground required to run a TDA7294. Now if this were 12V I'm pretty sure I could get +,-, and ground using a split power supply? but how am I to get 40V. Also, does it matter if this voltage is AC or DC? And if I need to use a transformer, where do I get one that steps down 120 VAC to 40V. Basically what I'm asking is what is the best way to drop 120V to 40V?
Thanks!
Connor Smith
I'm planning on building a TDA7294 circuit (http://www.st.com/stonline/books/pdf/docs/1057.pdf)
I've been playing around with smaller amps such as the tda2050 and tda2030 but so far I have just been using batteries to power them. I recently found an old wall unit that used a transformer, rectifiers, and a capacitor to drop the voltage from 120VAC to about 10VDC and I hooked this up to a TDA2030 and it works fine... But I'm kinda confused about the +40,-40, and ground required to run a TDA7294. Now if this were 12V I'm pretty sure I could get +,-, and ground using a split power supply? but how am I to get 40V. Also, does it matter if this voltage is AC or DC? And if I need to use a transformer, where do I get one that steps down 120 VAC to 40V. Basically what I'm asking is what is the best way to drop 120V to 40V?
Thanks!
Connor Smith