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smd-soldering-exercise-0805
Ultimate SMD soldering exercise full of 0805 resistor and caps, SOT-23 transistors and SOIC-8 opamps - 23 guitar pedals on one 10x10cm PCB.
Goals
- practice Kicad
- cram as many simple analog pedals on cheapest jlcpcb board (10x10cm, $4 for 5pcs)
- practice smd soldering with my new soldering iron
What I learned
- how to draw symbols
- how to draw footprints
- how to make 3d models
- how to make dual opamp as 2 separate triangles and separate rails
- how to use pwr flag to fix "power input pin after switch" issue
- how to make my own library of parts with only components I use
- not to reset anotations once I start placing components
- pads could have been bigger
- spacing could have been bigger (especially some SOD-123 diodes)
Features
- no mojo parts (only SOT-23 2N3904, 2N3906, MMBTJ201, 0805 R/C, SOD-123 diodes, SOIC-8 TL072CDR)
- 1pin headers for chaining pedals together (using 10cm F-F jumper wires for interconnect)
- 2pin headers with jumpers for on/off switch of individual pedals
- small RM065 trimmers
- 2 jacks
- battery holder, switch and led indicator
- 2 extra headers for external pots (blend and volume maybe)
- 2 extra headers with fixed voltage divider to blend signals, e.g. 50:50
- 2 extra 1x4 headers to tie 2-4 nets together
- 5 extra blending trimmers
Pedals
- JFET source follower
- NPN emitter follower
- Bazz fuss
- 2x opamp buffer
- Electra distortion
- Green ringer (octave up)
- Fuzz face (1k pot as fixed 2-resistor divider)
- Harmonic percolator (for input and output pots use universal bottom pots)
- Alembic stratoblaster (50k variable resistor as fixed single resistor)
- Bass boost
- Treble boost
- Cornish buffer
- Hyperion
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