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NSSL EFM Charge Amplifier

LeemanGeophysicalLLC·NSSL_EFM·PCBs/Analog_PCB/KiCAD_Project/analog_pcb.kicad_pcb

NSSL EFM Charge Amplifier PCB layout, top view — open source AVR/Arduino board by LeemanGeophysicalLLC

About the NSSL EFM Charge Amplifier PCB

NSSL EFM Charge Amplifier is an open source AVR/Arduino PCB design by LeemanGeophysicalLLC, published on GitHub. It is a 4-layer board measuring 44.5 × 31.8 mm, with 27 components from 19 distinct parts.

Its main chip is the 1-0000748, from the AVR/Arduino family. Other key parts include the 1-0000785 and 1-0000566. By type, the board carries 16 capacitors, 3 ICs, 3 resistors, 2 diodes, 1 crystal and 1 connector.

It belongs with the audio designs in this gallery.

From the project

NSSL EFM Redesign

This repository contains all files and relevant information for the electric field meter (EFM) designed for NSSL. This instrument has been in existance for many years, but beginning in approximatley 2019/2020 Leeman Geophysical was contracted to help design and implement the next generation of the device. This README should be a living document keeping the most current and relevant information on the assembly, operation, and programming of the instrument.

NSSL EFM Charge Amplifier, from the project README
From the project README

Main components on the NSSL EFM Charge Amplifier

1-00007851-00005661-0000748

NSSL EFM Charge Amplifier bill of materials (BOM)

27 components, 19 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
1-0000785
LF356
U1
1
1-0000566
LTC1569-6
U2
1
1-0000748
ATtiny45-20SU
U3
1
1-0000569
20MHz
Y1
1
1-0000790
Board to Board
J1
1
3-0000068
barepcb
PCB1
2
1-0000599
1N4148
D1, D2
4
1-0000007
1u
C1, C2, C9, C11
3
1-0000007
0.1u
C3, C10, C14
2
1-0000075
0.1u
C4, C12
1
1-0000018
1u
C5
1
1-0000007
0.1u
C6
2
1-0000007
0.39nF
C7, C8
1
1-0000075
20p
C13
1
20p
C15
1
1u
C16
1
1-0000013
100M
R1
1
1-0000013
100
R2
1
1-0000013
10k
R3

NSSL EFM Charge Amplifier design files

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

NSSL EFM Charge Amplifier: common questions

What microcontroller does the NSSL EFM Charge Amplifier use?

The NSSL EFM Charge Amplifier is built around the 1-0000748, from the AVR/Arduino family.

How big is the NSSL EFM Charge Amplifier PCB?

The NSSL EFM Charge Amplifier measures 44.5 × 31.8 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the NSSL EFM Charge Amplifier?

27 components, from 19 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 NSSL EFM Charge Amplifier design files?

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

Can I use the NSSL EFM Charge Amplifier design in my own project?

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

Can I test firmware for the NSSL EFM Charge Amplifier 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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