HardLabs

Lt counter

janos-raul·lt_counter·Kikad/MAS_LINIE_V4.kicad_pcb

Lt counter PCB layout, top view — open source AVR/Arduino board by janos-raul

About the Lt counter PCB

Lt counter is an open source AVR/Arduino PCB design by janos-raul, published on GitHub under the GPL-2.0 license. It is a 2-layer board measuring 145.2 × 87.1 mm, with 72 components from 24 distinct parts.

Its main chip is the ATmega1284P-A, from the AVR/Arduino family. Other key parts include the L7805, AMS1117-3.3 and ULN2803A. By type, the board carries 24 capacitors, 18 resistors, 16 connectors, 7 diodes, 4 ICs and 1 crystal.

From the project

longitudinal counter using atmega1284p and esp32

Main components on the Lt counter

L7805ATmega1284P-AAMS1117-3.3ULN2803A

Lt counter bill of materials (BOM)

72 components, 24 distinct parts.

QtyPartRefs
1
L7805
U1
1
ATmega1284P-A
U2
1
AMS1117-3.3
U3
1
ULN2803A
U4
1
LFXTAL003237REEL
XTAL20Mhz
Y1
1
Conn_ISP
J1
10
Conn_01x02_Socket
J2, J3, J4, J5, J6, J7, J8, J9 +2
3
Conn_01x03_Socket
J12, J13, J14
1
Conn_01x14_Socket
J15
1
Conn_01x06_Socket
J16
1
Buzzer
BZ1
1
10k
RV1
7
SM4001
D1, D3, D4, D5, D6, D7, D8
2
22pf
C1, C2
17
100nf
C3, C6, C7, C9, C10, C13, C14, C15 +9
1
10nf
C4
1
2200/25v
C5
3
1000/6.3
C8, C11, C12
1
47
R1
1
10k
R2
Show 4 more
QtyPartRefs
8
220
R3, R4, R5, R6, R7, R8, R9, R10
1
2k2
R11
6
4k7
R12, R13, R15, R16, R17, R18
1
3k3
R14

Lt counter design files

The KiCad project lives in the janos-raul/lt_counter repository on GitHub; these links point at the commit this page was built from.

Lt counter: common questions

What microcontroller does the Lt counter use?

The Lt counter is built around the ATmega1284P-A, from the AVR/Arduino family.

How big is the Lt counter PCB?

The Lt counter measures 145.2 × 87.1 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Lt counter?

72 components, from 24 distinct parts. The full bill of materials is listed on this page.

Where can I download the Lt counter design files?

From the janos-raul/lt_counter repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Lt counter design in my own project?

Yes, under the terms of its GPL-2.0 license, which janos-raul chose for the repository.

Can I test firmware for the Lt counter 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