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Avr transistor tester

vitaliy-bobrov·avr-transistor-tester

Avr transistor tester PCB layout, top view — open source AVR/Arduino board by vitaliy-bobrov

About the Avr transistor tester PCB

Avr transistor tester is an open source AVR/Arduino PCB design by vitaliy-bobrov, published on GitHub. It is a 2-layer board measuring 77.2 × 67.9 mm, with 63 components from 41 distinct parts.

Its main chip is the ATMEGA644PA-A, from the AVR/Arduino family. Other key parts include the MCP73832-2-OT, MT3608, LM4040DBZ-2.5 and TPMCP1702T-5002E/CB. By type, the board carries 25 resistors, 16 capacitors, 6 connectors, 5 ICs, 4 transistors and 4 diodes.

It belongs with the power & battery designs in this gallery.

From the project

Component/Transistor tester based on famous AVR Transistor Tester

Component/Transistor tester based on famous AVR Transistor Tester project. The reason I decided to create a custom PCB is that currently there is not good kit or complete device available that would fit my wishes:

- ATMega644 MCU - 2.4" 65K colors LCD - Rotary encoder - USB-C charger with Li-Po battery - Higher grade/precision components

Most of Chinese versions are starting to use fake or non-original Microchip MCUs that prevents their software upgrades and economy on components makes them less accurate. I didn't include a lot of hardware options, because I primarily using the device for…

Avr transistor tester, from the project README
From the project README

Main components on the Avr transistor tester

ATMEGA644PA-AMCP73832-2-OTMT3608LM4040DBZ-2.5TPMCP1702T-5002E/CB

Avr transistor tester bill of materials (BOM)

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

QtyPartRefs
1
ATMEGA644PA-A
ATmega644PA-A
U1
1
MCP73832-2-OT
U2
1
MT3608
U3
1
LM4040DBZ-2.5
U4
1
TPMCP1702T-5002E/CB
U5
1
DMP1045U
Q1
1
MMBT3906
Q2
2
MMBT3904
Q3, Q4
1
16MHZ
16MHz
Y1
1
USB_C
J1
1
Battery Li-Po 3.7V
J2
1
ISP
J3
1
TEST
J4
1
1x03 2.54
J5
1
ILI9341 LCD
J7
1
Rotary Encoder
SW1
2
SS34
D1, D2
2
LED
D3, D4
1
4.7UH
4.7uH
L1
5
4U7
4u7
C1, C2, C3, C12, C13
Show 21 more
QtyPartRefs
2
22U
22u
C4, C5
2
100N
100n
C6, C7
1
1n
C8
2
22P
22p
C9, C10
1
100n 1%
C11
1
10N
10n
C14
2
10U
10u
C15, C17
4
10K
10k
R1, R6, R14, R15
2
100K
100k
R2, R22
1
180K
120k
R3
1
15K
15k
R4
1
2K2
2k2
R5
4
470k 0.1%
R7, R9, R11, R13
3
680R 0.1%
R8, R10, R12
2
1k
R16, R17
1
10k 0.1%
R18
1
3k3 0.1%
R19
1
33K
33k
R20
1
3K3
3k3
R21
2
27K
27k
R23, R24
1
470R
R25

Avr transistor tester design files

The KiCad project lives in the vitaliy-bobrov/avr-transistor-tester repository on GitHub; these links point at the commit this page was built from.

Avr transistor tester: common questions

What microcontroller does the Avr transistor tester use?

The Avr transistor tester is built around the ATMEGA644PA-A, from the AVR/Arduino family.

How big is the Avr transistor tester PCB?

The Avr transistor tester measures 77.2 × 67.9 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Avr transistor tester?

63 components, from 41 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 Avr transistor tester design files?

From the vitaliy-bobrov/avr-transistor-tester 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 Avr transistor tester design in my own project?

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

Can I test firmware for the Avr transistor tester 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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