#2
Quote by vigenharutyunya
hey need to make it...

http://sound.westhost.com/project60.htm

but i didn't got some stufff


what's the JP1 dot???

what about "jumper"??

Also what shall i change for using it with 9v DC power???

thanks!!!

PS needed very very quick help
It is a very well written article. ALL the information you need is there.


what's the JP1 dot???

JP1 determines dot or bar mode.

With the jumper installed, the unit operates in bar mode, meaning that LEDs will light in a continuous bar.

If the jumper is omitted, then only the LED corresponding to the current signal level will light. Dot mode uses far less current, but the display is not as visible.



what about "jumper"??

Jumper = JP1
Connect the two points with the wire (jumper) and you get bar mode.
If you don't connect it, you get dot mode.


Also what shall i change for using it with 9v DC power???

If a low voltage supply is used, RDC and DC+ may simply be joined together.

The use of raw DC is only a requirement with supply voltages above around 12V to keep the dissipation of the LM3915 within ratings.

Battery operation is possible, but be warned that a 9V battery won't last very long. Using the circuit in "dot" more will prolong battery life because of lower average current.
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