HardLabs

Dpsgo

dpiegdon·dpsgo·pcb/gpsdo.kicad_pcb

Dpsgo PCB layout, top view — open source FPGA board by dpiegdon
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About the Dpsgo PCB

Dpsgo is an open source FPGA PCB design by dpiegdon, published on GitHub. It is a 4-layer board measuring 140 × 100 mm, with 149 components from 86 distinct parts.

Its main chip is the ICE40LP384-SG32, from the FPGA family. Other key parts include the MCP9808_MSOP, TPS652510, LT1763xS8, 74LVC1G17 and Si5351C-B-GM. By type, the board carries 49 resistors, 48 capacitors, 16 diodes, 15 connectors, 10 ICs and 4 inductors.

It belongs with the rf & radio, sensors and usb & debug tools designs in this gallery.

From the project

David's Pretty Satisfactory Gps-disciplined Oscillator

David's Pretty Satisfactory Gps-disciplined Oscillator

GPS disciplined oscillator ==========================

Accurate frequency reference for measurement equipment.

A 10MHz OCXO is tuned to a timing signal of a GPS, e.g. the 1PPS output. A frequency syntheziser then generates different signals from this reference as needed/configured by the user.

Currently I am working on the firmware for V1 of the PCB. During that I found multiple issues with PCB-V1 (Schematic) which hopefully culminate in another revision of the PCB, and then the firmware. See PCB-V1 ERRATA.

Dpsgo, from the project README
From the project README

Main components on the Dpsgo

ICE40LP384-SG32MCP9808_MSOPTPS652510LT1763xS874LVC1G17Si5351C-B-GMuBlox NEO-7MAD5761R

Dpsgo bill of materials (BOM)

149 components, 86 distinct parts.

QtyPartRefs
1
ICE40LP384-SG32
IC1
2
MCP9808_MSOP
U1, U2
1
TPS652510
U3
1
LT1763xS8
U4
2
74LVC1G17
U5, U7
1
Si5351C-B-GM
U6
1
uBlox NEO-7M
U8
1
AD5761R
U9
1
E73-2G4M08S1C-52840
M1
1
S9018
Q1
1
32768
Y1
1
8663-XS
Y2
1
JTAG
J1
1
SSD1306
J2
1
EXT_CLOCK
J3
2
USB_B_Micro
J5, J12
1
CLK3
J6
1
Screw_Terminal_01x03
J7
1
CLK2
J8
1
CLK1
J9
Show 66 more
QtyPartRefs
1
CLK0
J10
1
CLK7
J11
1
CLK6
J13
1
CLK5
J14
1
CLK4
J15
1
RF_Shield_One_Piece
J16
1
Antenna_Shield
AE1
1
EC11
SW1
1
MCML4-112B
SW2
2
PRTR5V0U2X
D1, D3
1
RED
D2
1
OUT0
D4
1
OUT1
D5
1
OUT2
D6
1
OUT3
D7
1
OUT4
D8
1
OUT5
D9
1
OUT6
D10
1
OUT7
D11
1
WHITE
D12
1
S3M
D13
1
RED
D14
1
GREEN
D15
1
LL4148
D16
2
4u7
L1, L2
1
220u
L3
1
DNP
L4
15
100n
C1, C11, C12, C22, C26, C27, C29, C31 +7
5
47n
C2, C3, C16, C17, C18
1
10u
C4
1
12p
C5
3
4n7
C6, C8, C10
1
82p
C7
1
22p
C9
3
DNP
C13, C14, C36
2
1u
C15, C25
4
10u
C19, C20, C33, C39
5
10u
C21, C23, C37, C38, C40
1
4u7
C24
5
10n
C28, C30, C32, C34, C43
1
10p
C44
2
12K
R1, R20
5
100K
R2, R7, R8, R28, R29
1
7K5
R3
2
300K
R4, R6
2
4K7
R5, R27
3
1K
R9, R13, R14
3
10K
R10, R23, R45
3
50
R11, R12, R44
1
4K7
R15
1
10K
R16
1
43K
R17
3
3K
R18, R47, R49
4
43K
R19, R21, R22, R26
1
82
R24
1
1K8
R25
1
0
R30
1
470
R31
1
1K8
R32
1
12K
R33
2
470
R34, R35
1
13
R36
2
27
R37, R38
4
680
R39, R41, R42, R43
1
DNP
R40
2
7K5
R46, R48

Dpsgo design files

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

Dpsgo: common questions

What microcontroller does the Dpsgo use?

The Dpsgo is built around the ICE40LP384-SG32, from the FPGA family.

How big is the Dpsgo PCB?

The Dpsgo measures 140 × 100 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Dpsgo?

149 components, from 86 distinct parts. The full bill of materials is listed on this page.

Where can I download the Dpsgo design files?

From the dpiegdon/dpsgo repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Dpsgo design in my own project?

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

Can I test firmware for the Dpsgo without the hardware?

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

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