HardLabs

AVR Meter

danielboston38·AVR_Meter

This repository ships a schematic but no board layout.
Simulate this board

About the AVR Meter PCB

AVR Meter is an open source AVR/Arduino PCB design by danielboston38, published on GitHub under the GPL-3.0 license. It is a board, with 52 components from 34 distinct parts.

Its main chip is the ATmega8/168/328, from the AVR/Arduino family. Other key parts include the LM336LP and 7805T. By type, the board carries 26 resistors, 10 capacitors, 5 connectors, 3 ICs, 3 transistors and 2 jumpers.

From the project

KiCad reconstruction of an ATmega328 frequency/voltage/resistance meter (AVR TransistorTester derivative), traced from a raster schematic and machine-verified against the exported netlist

KiCad 10 project rebuilt from ~/Documents/schematic.png (an Eagle export of an ATmega8/168/328 meter board). Every net was traced from the image by hand and then machine-checked against the exported netlist.

52 components, 45 nets, 161 pins. All through-hole footprints assigned.

- Power input / 5 V regulator — 7–12 V in on J1 via two paralleled SB130s (D1/D3, one per input pair), a BC328-40 PNP high-side switch (Q7) gated by R10/R7, then a 7805 with 2.2 µF either side and a 10 µH output choke. - Soft power latch — pressing the button on J2 pulls Q7's base low through R7; the MCU then holds…

Main components on the AVR Meter

LM336LP7805TATmega8/168/328

AVR Meter bill of materials (BOM)

52 components, 34 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
LM336LP
IC1
1
7805T
IC2
1
ATmega8/168/328
U1
1
BC547B
Q1
1
8MHz
Q4
1
BC328-40
Q7
1
7-12VDC_9V
J1
1
LED_START
J2
1
FREQUENCY_VOLTAGE
J3
1
TEST_POINTS
J4
1
ENCODER
J5
1
ISP
JP3
1
LCD Display
JP7
2
SB130
D1, D3
1
10uH 0.1A
L1
1
1nF
C1
1
10nF
C2
2
100nF
C3, C4
2
33pF
C5, C6
2
2.2uF
C7, C8
Show 14 more
QtyPartRefs
2
100n
C9, C10
3
680
R1, R3, R5
3
470k
R2, R4, R6
2
3k3
R7, R12
2
27k
R8, R17
1
100k
R9
1
33k
R10
6
10k
R11, R13, R18, R19, R20, R22
1
470
R14
1
15k
R15
1
2k2
R16
1
180k
R21
2
10k
R23, R24
2
1k
R25, R26

AVR Meter design files

The KiCad project lives in the danielboston38/AVR_Meter repository on GitHub; these links point at the commit this page was built from.

AVR Meter: common questions

What microcontroller does the AVR Meter use?

The AVR Meter is built around the ATmega8/168/328, from the AVR/Arduino family.

How many components are on the AVR Meter?

52 components, from 34 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 Meter design files?

From the danielboston38/AVR_Meter repository on GitHub, which has the schematic, a netlist and the BOM; the links under Design files point to each one.

Can I use the AVR Meter design in my own project?

Yes, under the terms of its GPL-3.0 license, which danielboston38 chose for the repository.

Can I test firmware for the AVR Meter 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.

Similar boards