Mini Ripples Build Guide

>> Buy the kit here! <<

Bill of Materials

R1 = 1k

R2 = 2.2m

R3 = 2.2m

R4 = 10k

R5 = 10k

R6 = 10k

R7 = 10k

R8 = 7.5k

R9 = 10k

R10 = 7.5k

R11 = 33k

R12 = x (x means not included in this version!)

R13 = x

R14 = 2k

R15 = 2k R16 = 68k

R17 = 47k

R18 = 47k

"CLR" on footswitch PCB = current limiting resistor. 4.7k is a common choice for 3mm LEDs

C1 = 100n

C2 = 100n

C3 = 2.7n

C4 = 2.7n

C5 = 100n

C6 = 100n

C7 = 100n

C8 = 100n

C9 = x

C10 = 47u

C11 = 100n

C12 = 100n C13 = 100n

C14 = 100u

C15 = 100u

C16 = 47u C17 = 100u

C18 = 100u

C19 = 100u

C20 = 100u Ignore C1 on the footswitch PCB!

D1 = 1n4001

Q1 = 78L05 (5v voltage regulator)

Q2 = 78L05 (another one for the LFOs!)

Pots: Size, Density and Delay = B10k, Volume and Pitch = A100k

ICs: PT2399, TL072, "PIC" on PCB is the microcontroller included in the kit

The vactrols go in the large footprints in the middle of the PCB (ringed in yellow, below image). Make sure "+" on each vactrol goes in a hole marked "+"

Special instructions

Soldering the pots can be a bit tricky as some of the solder points are inbetween large capacitors (ringed in red, above image). It's not too hard to get an iron down there without melting a cap, but you may prefer to solder the pots first and bend them up to solder those capacitors etc.

I recommend using these DC jack sockets to save room in the case.

Schematic

Drilling

I don't have a printable drill template but I'd be very happy if someone could make one! These are the dimensions of the pot spacing. The layout is symmetrical across the grey vertical centre line (left side mirrors the right side).