Bastl Instruments KASTLE v1.3 User manual
last update: 4. 9. 2017
KASTLE v1.3 - Assembly Guide
bastl-instruments.com
INTRODUCTION
Welcome to the assembly guide for the Kastle kit - mini modular synthesizer. It is suitable for
beginners. It is good to have basic soldering skills and to be able to identify electronic components
before starting this kit. However if you have never soldered before, check out some of tutorials here or
here. We also included some of the best quality solder to help you solder everything faster and better.
The Kastle kit consists of just one PCB. All the parts comes in two bags separated for the soldering
and assembly parts. Please check all of your parts BEFORE you begin work to make sure you are not
missing anything. See the bill of materials for detailed list.
1
BILL OF MATERIALS
qty
value
part
11
1k
R-EU_0204/5
9
100k
R-EU_0204/5
4
470nF
ceramic capacitor
10
Zener diode 5V1
DIODE-D-7.5
2
jack TRS 3.5mm
audio connector
7
B100k
POT LIN
1
difuse green 3mm
LED
1
SPDT TOGGLE
SWITCH 2PP
6
1x2pin
female pinheader
8
1x3pin
female pinheader
2
8 pin DIL
DIL socket - in foam
1
attiny 85 pre-programmed VCO
IC in foam
1
attiny 85 pre-programmed LFO
IC in foam
1
Kastle 1.0
PCB
1
BH-331-3D
1.5V BATTERY HOLDER
1
8mm nut x nut
spacer
1
10mm
screw
1
6mm
screw
1
top
plastic case
2
side
plastic case
1
front
plastic case
1
back
plastic case
10
jumper cables
1
allen key
2
BEFORE STARTING THE KIT...
Prepare the following tools:
● Soldering iron (15-20W)
● Flush cutters
● n2. hex screwdriver or allen key (enclosed with kit)
● Needlenose pliers
● Protective eyewear
We suggest to work in a clean and a well lit and ventilated environment to avoid accidents or losing
any of the small components.
Also briefly go through this guide and make sure that you understand all the steps.
SOLDERING
Start the soldering with the resistors. There are just two values of them: 1k (11x) and 100k (9x).
Before you will start soldering, check the values by using a multimeter or you can check the color
1
codes - the 100k's have the orange stripe. Then snip the leads close to the PCB (be sure to make
this step on all remaining leads in the course of this guide) and set aside a few of them. You will use
them later. Solder also the Zener diodes (10x) - be careful, diodes are polarized! Make sure that
the black stripe on the diode matches the stripe on the PCB. See the photos below for all these steps.
1 https://learn.sparkfun.com/tutorials/how-to-use-a-multimeter/measuring-resistance
3
4
5
Add the 3,5mm jack connectors (2x).
6
Insert the IC sockets (2x; 8 pin DIL). Just be aware of the right direction of sockets - there is a
notch on the sockets that has to match with the ring on the PCB.
Add the ceramic capacitors now. There are just four of them of the same value - 470nF (they are
marked "474" on itself).
7
Now let's do the female pinheaders:2 pin ones (6x) and 3 pin ones (8x). It may take a little patience
to insert them well. Be sure to solder them straight.
Go for the switch now. This may be one of the parts that is a little tricky to solder. Here is the
SOLDERING TIP: start with soldering just ONE solder point of the part. Check the part to see if it is in
straight. If there is a problem simply melt the solder and reposition the part.
8
Next move to soldering of potentiometers (B100k). Proceed the same way as with the switch: install
potentiometers in straight, solder just one leg, check the position and solder the rest if there is no
problem.
Solder the green LED - be sure to insert the longer lead into the plus (+) hole. Push the LED down to
the PCB.
9
You will need the cutted leads from resistors now. Turn the PCB around and give a little bit iron into
the remaining "HOLD”, "BAT_-” and "BAT_+” holes. Re-heat them and insert the leads using
needlenose pliers. The leads can not be connected with the potentiometers on the other side.
10
Table of contents
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