[[so]hai(R)]

Hi, just to show you guys my portable amp series....

2 Cmoys (one AD823 and one OPA2134) and 1 Jung's multiloop.... Meta is on it's way....

All incorporated onboard charger and PCB mount battery... operating time is approximately 15 hours for Cmoy and 10 hours 4 Jung's...

How many amps do i really need???

 

[[so]hai(R)]

Inside....

 

[[so]hai(R)]

back view...

 

[[so]hai(R)]

well....

 

[[so]hai(R)]

last one... i think...

 

[guzzler]

they're really neat! what are those batteries your using, and fancy posting a schematic of the charging circuit =)

g

 

[guzzler]

idot!! <- me!!

just found the schematics for it, but still interested by those batteries!!

g

 

[[so]hai(R)]

hi guzzler, those r PCB mount battery... however, i'm not sure whether RS stocks them , but here is the order code from Farnell, 279353
http://uk1.farnell.com/Search/level_...44&SKUID=18329

Also the schemetic i posted is for 9V battery, so if u want to use these batteries, u need to modify a bit to suit with these battery...i.e. u may want to enable the timer function and also the Voltage Sense Input for max voltage...

Glad u like them....

 

[jasonhanjk]

These batteries use for charging I presume... I'll try this design with my upcoming PPA building...

Still looking for the required parts and maybe a lot of fine tune needed as it is not complete at Audiologica......

Hopefully it can be completed fast...

 

[[so]hai(R)]

hi jason, i'm from Malaysia too... good to see malaysians here.....

 

[guzzler]

this may sound stupid, but would it be possible to just use a 555 timer with a power transistor to provide a sort of rudimentary charging circuit?? would be excellent if you could!

g

 

[jasonhanjk]

Sohai, you're studying abroad. How's the wheather there? We got a bit of SARS issue here...

 

[[so]hai(R)]

Hi guzzler, i'm not sure about that but if u use 555 timer, u'll need some sort of termination method to terminate the charger, i.e. a counter.... so i think that's should be the hard way to do thing...

or another idea is 8-pins microcontroller which should be more advanced and compact...

Jason, yes... i'm currently in the University of Birmingham and the weather here is very good... compared to Winter...

Ya... i know about the SARS issue there... hope they will clear up soon... i'm going home in June... really missed home....

 

[jasonhanjk]

Yup. At the mean time, enjoy your new amp!!!

It will be 12 midnight soon, and ZZZzzzzzzz......
Good night.

 

[yejun]

where is the charging circuit?