Converting PTH to SMD

[Arch]

Hi, I am going to be doing repairs to an old guitar pedal and in the process of learning how it works I was thinking of mapping the schematic out in eagle to learn more. Then I was thinking beyond this point. Maybe I will make my own clone of it and figured maybe I could use this as a chance to learn about SMD boards and components

What is the general process in converting PTH boards to SMD boards?
- Simulate in spice to find min/max voltages on components
- Simulate in spice to find min/max current through components
- Determine max power for components
- Find equivalent/valid components in SMD form
- Swap components out
- Redo traces
- Compact board layout

Does this sound about right?
Are there any good links on this topic that you know of?

In case it matters, this is the schematic for the pedal http://www.geofex.com/FX_images/p180.gif

[tautech]

I don't see any power issues for components for that schematic other than around the zener regulator. That's all I would check.
Presumably all the pots and jacks are off PCB.
You could make a custom footprint for these rather than standard to save more board space.
Under 50 x 50 mm is achievable I think.
 

[Arch]

I don't see any power issues for components for that schematic other than around the zener regulator. That's all I would check.
Presumably all the pots and jacks are off PCB.
You could make a custom footprint for these rather than standard to save more board space.
Under 50 x 50 mm is achievable I think.

Pots, jacks are off board
Do you mean a custom footprint for the off board connections?

[rob77]

no worries about max power... according to the schematic the current through the zener without loading the 3V reference is approx 0.6mA => approx ~ 36mW on the 10k resistor and ~ 18mW on the zener - that's half a bee's dick
even if you would short the 3V reference to ground, you would get 0.9mA through the 10k resistor and approx ~ 81mW - still well withing the 125mW max dissipation of a 0805 SMD resistor (or 100mW for 0603 size).

i would suggest to completely skip the simulation and just focus on the PCB layout

[Arch]

no worries about max power... according to the schematic the current through the zener without loading the 3V reference is approx 0.6mA => approx ~ 36mW on the 10k resistor and ~ 18mW on the zener - that's half a bee's dick
even if you would short the 3V reference to ground, you would get 0.9mA through the 10k resistor and approx ~ 81mW - still well withing the 125mW max dissipation of a 0805 SMD resistor (or 100mW for 0603 size).

i would suggest to completely skip the simulation and just focus on the PCB layout

Haha ok cool 
PCB layout is the fun part 

[tautech]

I don't see any power issues for components for that schematic other than around the zener regulator. That's all I would check.
Presumably all the pots and jacks are off PCB.
You could make a custom footprint for these rather than standard to save more board space.
Under 50 x 50 mm is achievable I think.

Pots, jacks are off board
Do you mean a custom footprint for the off board connections?

Exactly