HardLabs

KapTesterV2

Lancarr8·KapTesterV2·KiCad KapTester V2/KapTesterV2.kicad_pcb

KapTesterV2 PCB layout, top view — open source AVR/Arduino board by Lancarr8

About the KapTesterV2 PCB

KapTesterV2 is an open source AVR/Arduino PCB design by Lancarr8, published on GitHub. It is a 2-layer board measuring 90 × 70 mm, with 41 components from 35 distinct parts.

Its main chip is the ATMEGA328P-AU, from the AVR/Arduino family. Other key parts include the LM317L_SOT-89. By type, the board carries 11 resistors, 8 capacitors, 4 connectors, 2 ICs, 2 transistors and 2 diodes.

It belongs with the displays & leds designs in this gallery.

From the project

Capacitance Tester – ATmega328P based PCB project (AP2)

The KapTester V2 is a custom-built capacitance measurement device based on the ATmega328P microcontroller. It was designed and built from scratch as part of a vocational training exam (IHK AP2), covering all phases from schematic design to PCB manufacturing and firmware development.

Three firmware versions were developed during the project:

- AVR-GCC – Firmware compilation - avrdude – Flashing - KiCad 8 – Schematic & PCB design - PCBWay – PCB manufacturing

Main components on the KapTesterV2

ATMEGA328P-AULM317L_SOT-89

KapTesterV2 bill of materials (BOM)

41 components, 35 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
ATMEGA328P-AU
ATmega328P-AU
U1
1
LM317L_SOT-89
U2
1
IRLML6402
Q1
1
2N7002
Q2
1
Crystal 16MHz
Y1
1
USB_B_Micro
J1
1
CONN_01X04
Conn_01x04
J2
1
CONN_01X02
Conn_01x02
J3
1
AVR-ISP-6
J4
1
TP-USB5V
JTP1
1
TP-5VBOARD
JTP2
1
TP-SDA
JTP3
1
TP-LM317IN
JTP4
1
TP-GND
JTP5
1
TP-ADC
JTP6
1
TP-AVCC
JTP7
1
TP-RESET
JTP8
1
TP-MEAS
JTP9
1
TP-DISCH
JTP10
1
SW_Push
SW1
Show 15 more
QtyPartRefs
1
LED_PWR
D1
1
LED_ERR
D2
3
100NF
100nF
C1, C2, C5
1
100nF, VCC
C3
1
100nF, AVCC
C4
2
22PF
22pF
C6, C7
1
10NF
10nF
C8
1
1k Ω
R1
2
100K Ω
R2, R3
2
4,7K Ω
R4, R5
2
330 Ω
R6, R7
1
1,2K Ω
R8
1
100k Ω
R9
1
10K Ω
R10
1
470 Ω
R20

KapTesterV2 design files

The KiCad project lives in the Lancarr8/KapTesterV2 repository on GitHub; these links point at the commit this page was built from.

KapTesterV2: common questions

What microcontroller does the KapTesterV2 use?

The KapTesterV2 is built around the ATMEGA328P-AU, from the AVR/Arduino family.

How big is the KapTesterV2 PCB?

The KapTesterV2 measures 90 × 70 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the KapTesterV2?

41 components, from 35 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the KapTesterV2 design files?

From the Lancarr8/KapTesterV2 repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the KapTesterV2 design in my own project?

The repository has no license, so all rights stay with Lancarr8. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the KapTesterV2 without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug AVR/Arduino firmware against it before you order a PCB.

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