|4||1k||Resistor||R0805||R1, R2, R3, R6||RESISTOR|
|1||2k||Resistor||R0805||R4||RESISTOR, American symbol|
|3||100k||Resistor||R0805||R8, R9, R10||RESISTOR|
|1||B10k||Potentiometer||9MM SNAP-IN||VR1||9mm vertical snap-in pot, Alpha / Panasonic style with 6mm built-in knob.|
|2||1u||CAPACITOR_NPOL-0805||C805||C1, C2||Non-Polarized capacitor|
|1||1N4007||DIODE-DO214AC||DO214AC||D4||Power protection DIODE|
|4||B54S||BAT54S Schottky Diodes||BAT54S_SOT23||D1, D2, D3, D5||Schottky barrier (double) diodes|
|1||MCP1702-5||TO92-INLINE||IC3||LDO Regulator PICK ONLY ONE|
|1||MCP1702-5||SOT23-3||IC1||LDO Regulator PICK ONLY ONE|
|1||ATTINY85-20||DIP08||U2||Atmel 8-pin 2/4/8kB flash uC|
|1||Header||1X01 Male||JP2||PIN HEADER|
|2||Header||1X03 Male||JP1, JP4||PIN HEADER|
|3||3.5mm Jack||THONKICONN||3.5mm socket for Eurorack modular synths||http://shop.erthenvar.com/collections/accessories/products/3-5mm-inline-jacks||https://www.thonk.co.uk/shop/3-5mm-jacks/|
Build InstructionsClean PCB with isopropyl alcohol to remove any manufacturing residues.Now is also a good time to file away the “mouse bites” that separate the PCB and Panel.Solder the surface mount devices. Each of the three modules uses different configurations of input and output pull-up and pulld-own resistors. Leave the unused spots empty.If building the Clock Multiplier, the wire jumpers can be soldered in now. Bend a bit of discarded resistor lead into a U and drop it into the holes to connect those traces. Trim the leads flush on the other side so it won’t interfere with the socket later.
Add the SMD-side through-hole components. The Clock Divider and Clock Generator have their jumper pins installed now.If doing two or three different boards marking each PCB will prevent confusion later on. A white “paint pen” works best, but a black sharpie is also visible. Trim the IC Socket pins almost flush to the bottom of the PCB so they won’t interfere with the potentiometer (they shouldn’t anyway).
Straighten the potentiometer “snap in” supports so that they can clear the DIP socket when being installed. They may need to be flared outwards a wee tad.Before soldering the pot double-check to make sure the DIP pins are contacting the metal body.
Use the panel to help align the sockets and LED.The power cable can be installed now.