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Pdh servo v2

vuthalab·pdh_servo_v2·kicad/pdh_v2.kicad_pcb

Pdh servo v2 PCB layout, top view — open source board by vuthalab
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About the Pdh servo v2 PCB

Pdh servo v2 is an open source PCB design by vuthalab, published on GitHub under the MIT license. It is a 2-layer board measuring 159 × 159 mm, with 137 components from 46 distinct parts.

Other key parts include the LT1028CS8#PBF-ND, 296-26245-1, ADR4540ARZ, AD5541A and AD8628_tri. By type, the board carries 53 capacitors, 40 resistors, 18 ICs, 9 switches, 5 connectors and 4 diodes.

It belongs with the robotics & motion designs in this gallery.

From the project

A servo controller for locking lasers to high-finesse cavities

pdhservov2 is a servo controller for locking lasers to high finesse optical cavities using the Pound-Drever-Hall technique. The board features the following:

- A PI^2D controller for > 1MHz locking bandwidth. - Microcontroller controlled analog switches to turn the servo as well as the integrator switches on and off. - Auto relocking sequence that detects when laser is out of lock, starts scanning the laser frequency to find resonance and re-engages the servo when the laser is in the capture region of the lock. - WiFi enabled microcontroller for remote monitoring and control.

Pdh servo v2, from the project README
From the project README

Main components on the Pdh servo v2

LT1028CS8#PBF-ND296-26245-1ADR4540ARZAD5541AAD8628_triPHOTONED26107805_correctedAD820ADA4177-1

Pdh servo v2 bill of materials (BOM)

137 components, 46 distinct parts — part numbers from the project's BOM.

QtyPartRefs
2
LT1028CS8#PBF-ND
LT1028
U1, U2
7
296-26245-1
OPA2227
U3, U4, U5, U6, U7, U8, U20
1
ADR4540ARZ
ADR4540
U9
1
AD5541A
U10
1
AD8628_tri
U11
1
PHOTON
U12
1
ED2610
U13
2
7805_corrected
U14, U15
1
AD820
U16
1
ADA4177-1
U17
1
MPSA64_PNP
Q1
1
MPSA14_NPN
Q2
1
A35107
DB9
J1
1
Error In-Ext Curr Mod
P1
1
Curr-Piezo Out
P2
1
In-Out Mon
P3
1
Trans In-Out
P4
1
534B1201JC
200
RV1
1
10K
10k
RV2
3
1k
RV3, RV4, RV5
Show 26 more
QtyPartRefs
2
DG444
S1, S6
2
spdt
S2, S7
5
spdt
S3, S4, S5, S8, S9
1
TEST_1P
W1
4
296-22819-2
TL4050B41
D1, D2, D3, D4
38
0.1UF
0.1uF
C1, C2, C4, C7, C8, C9, C10, C14 +30
2
1NF
1nF
C3, C11
1
2NF
2nF
C5
1
15PF
15pF
C6
4
1UF
1uF
C12, C23, C30, C31
1
50PF
50pF
C13
1
330PF
330pF
C18
2
0.33UF
0.33uF
C29, C33
2
10UF
10uF
C34, C35
1
22NF
22nF
C45
4
2k
R1, R2, R28, R29
1
311-12GR
12
R3
12
1k
R4, R7, R8, R10, R13, R14, R17, R20 +4
1
500K
500k
R5
15
10K
10k
R6, R11, R15, R19, R23, R25, R26, R27 +7
1
3k
R9
1
311-49.9HR
50
R12
1
311-499HR
500
R18
1
5k
R22
1
19K
19k
R45
2
INF
R46, R47

Pdh servo v2 design files

The KiCad project lives in the vuthalab/pdh_servo_v2 repository on GitHub; these links point at the commit this page was built from.

Pdh servo v2: common questions

How big is the Pdh servo v2 PCB?

The Pdh servo v2 measures 159 × 159 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Pdh servo v2?

137 components, from 46 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 Pdh servo v2 design files?

From the vuthalab/pdh_servo_v2 repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.

Can I use the Pdh servo v2 design in my own project?

Yes, under the terms of its MIT license, which vuthalab chose for the repository.

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