WORNG Electronics TMLPG Technical manual

WORNG Electronics –TMLPG
Build Document V1.1
Page 1
Your solder joints should look like those shown as ‘OK’ below, they should have that neat
conical shape on BOTH sides of the PCB. If they don’t look the same on both sides then
stop! Work out why from the soldering guides linked and don’t continue until you are getting
those results. This isn’t about perfectionism, you are very likely to end up with a destroyed,
damaged or defective unit if you’re not hitting that standard.
This photo is from the Adafruit guide to excellent soldering - http://bit.ly/1l77tF4 and is
reproduced under an Attribution-Sharealike creative commons license -
http://creativecommons.org/licenses/by-sa/3.0/

WORNG Electronics –TMLPG
Build Document V1.1
Page 2
1. First place the 8 vactrols on the PCB as shown. NOTE: orientation is vital! The dot on
the vactrol must line up with the white dot on the PCB silkscreen as shown below.

WORNG Electronics –TMLPG
Build Document V1.1
Page 3
2. Next turn the PCB over and place and solder the two capacitors at C5 and C6, and
then the 2x8 male header –these parts are all placed on the opposite side of the PCB
as the vactrols. (Capacitors included in Thonk kits may look different to those in the
photo).
3. Next turn the PCB back over to the vactrol side and then place but DON’T SOLDER
YET all the front side components onto the PCB (Pots, switches, jacks, LEDs). NOTE:
The shorter leg of each LED must go towards the flat edge of the circle on the PCB
silkscreen.

WORNG Electronics –TMLPG
Build Document V1.1
Page 4
4. Now place on the front panel and screw on all nuts on to the jacks and switches and
the nuts and onto the pots. Then take some masking tape and use it to hold the LEDs
so that they sit flush with the front of the panel.
Once the LEDs are held nicely level with the front of the panel you can then solder
everything in.
NOTE! Do not use regular tape as it will leave a sticky residue on the panel –only use
masking or non-stick tape to hold the LEDs in place.

WORNG Electronics –TMLPG
Build Document V1.1
Page 5
5. Finally you can place the knobs onto the pots and then attach the 16-pin ribbon
cable as shown below –with the red stripe facing towards the bottom of the
module. The module attaches to the pulse expander header on the main Turing
Machine module.