Assembly Instructions; Nkeyer Board Bom/Parts List - Arduino nKeyer Manual

2. Assembly Instructions

This section covers the construction of the nKeyer. It approaches assembly as a learning
exercise for new builders, so that they can develop proficiency and self-confidence. The build
is quite simple and if you follow the steps carefully, you should have a working board when you
are done. Additional information and guides on techniques and tools can be found in the
"Tools and Parts ID Guide" at:

2.1 nKeyer board BOM/Parts List

Picture Designators
R1, R5
R2, R4, R6, R7, R9-R14
R3
R8
C1, C2, C4
C3 Optional for DC
blocking on the audio out.
C5
D1
U1 (opt but
recommended)
U1
U2 (opt for >5v input)
Q1, Q2
J3-PWR LED, J5-TX LED LED Standard 5mm (any
J1-1x4, J2-1x2, J4-1x3,
J6-1x2, J8-1x3, J9-1x2,
J10-1x5, J11-1x5
J7 Buttons 2x8
nKeyer
www.renard-plus.com/files/Tools_and_Parts_ID_Guide.pdf
Description
470 ohm resistor ¼ watt
1.0k ohm resistor ¼ watt
10k ohm resistor ¼ watt
100 ohm resistor ¼ watt
.01uf (10nf) 50v
monolithic ceramic cap
Jumper wire (or 1uf -
220uf electrolytic or
tantalum cap)
220uf 16v electrolytic
1N4148 diode
1x15 pin 2.54 pin
spacing female header
Arduino Nano 3.0
16MHz, 5V,
ATMEGA328P
Mini "360" Buck
regulator (adjust to 5v
output)
2N2222a or 2N3904
NPN Transistor
color)
Single row headers –
various
2x8 dual row header
Page 5 of 15
Qty Note
2
10
1
1
3
Typically not used -
1
jumper across
1
1
Allows the Nano to be
2
removed replaced
1
If your input is 5V, this
1
can be left out by placing
a jumper across JP1
"Buck bypass"
1
Place header pins if LED
2
will be mounted on the
enclosure.
Cut to appropriate # of
30
pins for the location
pins
1
Version 1g
By N7XG / KI6TMF