About aalejo

Cabanatuan City
Dec. 15, 2013
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  • aalejo commented on chipstein's instructable A Preamplifier for Smartphone Oscilloscopes7 months ago
    A Preamplifier for Smartphone Oscilloscopes

    question why my preamp of my cellphone got been destroyed I mean it time to time the preamp overheat and pop!! And I can't use it why did just happening is there a problem with pot resistance what happen if I low resistance about 5k it will work???

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  • aalejo commented on fx8's instructable USB Stereo amplifier 20W+20W with TDA2822M8 months ago
    USB Stereo amplifier 20W+20W with TDA2822M

    wait what??? No!! Bro its only .5 watts per channel and only 1 watt in bridge config try to see data sheet not a internet blogs to see what is the real data of the ic will use

    as simple as this tda2822 can't handle much power that a regular lm386 so meaning to say tea can't handle much current voltage as should be the amp can only max absolute maximum voltage of 9 only not 12 or 10 volt I can assure to you if younrun the amp make sure. You just put low watts around 5 watts in 4 ohms load only or 2ohms 5watt much better or much not hurt the ic is 3 watts in 8 ohms that will make the perfect amp but I think you want the amp run in DC voltage I suggest to put 4x2200 electrolytic cap 16 and .1 uf cap in all in caps in parrallel!! To make the amp much no to much distortion by the way nominal 6 to 9 is enough to punch not distorted at max volume I suggested to if you just put a electrolytic cap in input so it will filter choke much better the amp!! But wait!!! Here's be use just only .1 uf electrolytic cap not mylar cap or ceramic one you know why??? It will because may not or !! Will back up bad signal to the device you use and it destroy the preamp of it i suggest it if you put 22k resistor in parallel to the ground so it will sound quality in HiFi mode it will good a instrumentals and heavy bass to I really!! Almost!! Forgot did you see pin 4 the ground ones??? Make sure!!! You put much copper wire or much lead connected to it to the ground to make the distortion and unwanted noise like radio sound come out and clear it !! Promise bro you will rock the amp in no time!!! At!! Again almost forgot to make it much in boost try bridge it its like pin 1 and pin 3 connected in with a 8 ohm 3 watts or just 5 watts 8 ohms speaker in 9 volts 1amp supply. Again!! Almost forgot again!!! Why I put 4 x 2200 if caps in parallel??? Because to make a increase the watts in pwr of the power of the amp make it fullbodied to and last to make a amp much longer power when it use and last to make sure the power not been go down and will continued no distortion make a lower watts when hit low frequency or just hit a bass signals I sure to you the lads!! That 99% of volume of the amp will get no distortion will not came out at all you will the bass of the amp and somehow try to use bass woofer speaker like normal for bass intended speaker rated 3 watts or 5 and I got. Hardyhar if the instrcutables said 20 watts amp it can't say 20 wat from .5 watts source and if you want to make 2x20 watts use tda2005 or 2010 or just may favorite tda7377 much better if you just put preamp to can add wattage to it but for me if you want some speaker just use tda2030 and center tapped transformer to it so can much easier in guitar and home sound system

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