### DESCRIPTION

do you know..  osiloscope?   dotmtrix led can use as fun. not detil resolution but enough to visualisation wave form audio. no microcontroller no sourcecode    :)

### TECHNICAL DETAILS / COMPONENTS

row controlled by lm3914 check datasheet for modification

col  scan by 4017.  need more currrent up use tr inverted signal use 4069

4069 also as clock generator replace ic 555.   scheme not mine. try search on  google

### LEARN / TOPIC / BUILD INSTRUCTIONS

order pcb... buy parts... connect to matrix module led.  vcc 5..9 volt...   inject audio signal into lm3914. enjoy the show.

thanks to bebe at lombok city.. great design bro.   printed at pcbway only 5 doll4r 10pcs