R1= 1K8 R6= 100K trimmer IC1= LM3915 R2= 100K trimmer C1= 100nF 100V IC2= 4017 R3= 1K D1....10= RED LED IC3= 4011 R4= 100R.....1K D11....20= YELLOW LED R5= 100R.....1K D21....30= GREEN LED