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Scmrcd build guide Rotating Clock Divider Shu ing Clock Multiplier Kit Builder's Guide for PCB v mspedals com RCD and SCM This guide is for building a Rotating Clock Divider RCD or Shu ing Clock Multiplier SCM from the ms kit The circuits are nearly ident

Rotating Clock Divider Shu ing Clock Multiplier Kit Builder's Guide for PCB v mspedals com RCD and SCM This guide is for building a Rotating Clock Divider RCD or Shu ing Clock Multiplier SCM from the ms kit The circuits are nearly identical except for some resistors explained in Step Also there's di ?erent color LEDs and faceplate graphics and the ?rmware on the ATMEGA chip is di ?erent Tools Needed ? Soldering iron ? Flush snips ? Needlenose pliers CStep Resistors Insert and solder the resistors After soldering snip the leads nearly ush to the PCB you'll be snipping the leads ush on all the components after soldering The SCM has resistors ? ohm x yellow purple brown ? k x brown black orange ? k x brown black yellow ? k x yellow purple yellow -- only x for the RCD The RCD is the same except use only use two k resistors Instead of the other k's one is a jumper labeled RCD and one is completely omitted labeled with RCD omit Be careful not to confuse k and The k's have two yellow bands while the 's have one yellow band The SCM Resistors The RCD resistors plus one jumper wire circled Step Capacitors Diodes Crystal Resonator Voltage Regulator Careful Many of these components must be orientated correctly before soldering Insert and solder the diodes There's a white or black band on each diode that must go towards the tip of the arrow on the PCB The red diodes are bent so they stand up with the black band up in the air ? ??Si ? N diodes x smallest ? ?? V ? N Zener diodes x slightly larger red diodes ?? ? ? N diode x black Insert and solder the voltage regulator and the MHz crystal resonator The resonator can go in either way but the must bend over so that the text is up see photo Insert and solder the small capacitors They can go in either way ? pF or x ? pF or x ? pF or x ? uF or x Insert and solder the two uF caps One side of the cap is marked with a black or white stripe this is the negative and it goes in the round hole The positive lead is longer and it goes in the square hole CStep Top Resistor Arrays Insert and solder the three resistor array on the top of the PCB The dot on each array must line up with the square hole on the PCB see photo ? k isolated -pin array x ?? B G ? ? k bussed -pin array x ?? A G ? Step IC Sockets Header pins and Transistors Insert and solder the two -pin IC sockets The notch in the sockets points towards the top of the board there is a matching notch drawn on the PCB too ? -pin socket x Insert and solder the transistors making sure the at side