HardLabs

Deflection amp 3

Thinkpad4by3·chibitron·deflection_amp_3/deflection_amp_3.kicad_pcb

Deflection amp 3 PCB layout, top view — open source RP2040/RP2350 board by Thinkpad4by3

About the Deflection amp 3 PCB

Deflection amp 3 is an open source RP2040/RP2350 PCB design by Thinkpad4by3, published on GitHub. It is a 2-layer board measuring 100 × 86 mm, with 199 components from 49 distinct parts.

Its main chip is the RP2040, from the RP2040/RP2350 family. Other key parts include the AP2205-ADJ, LT8365, W25Q128JVS, MCP4822 and LMH6639. By type, the board carries 84 resistors, 47 capacitors, 32 transistors, 12 ICs, 9 diodes and 4 connectors.

From the project

Electrostatic CRT driver designed from the ground up for performance, versatility and ease-of-manufacturability

The 2nd board is the deflection board, which consists of all the required components to take any sort of vector control X/Y signal and amplify it to the +/- 150V required to move the beam around. This board is compatible with almost every type of ES-CRT, including single ended deflection type tubes. All plates are driven by 300Vpk-pk 500KHz bandwidth amplifiers, where gain/offset can be used to control picture size, and neutral voltage can set for astigmatism. Amplifiers are of a class-AB variety, and are closed loop for minimal distortion, and are powered by their own local bi-polar power…

Main components on the Deflection amp 3

AP2205-ADJLT8365W25Q128JVSRP2040MCP4822LMH6639

Deflection amp 3 bill of materials (BOM)

199 components, 49 distinct parts — part numbers from the project's BOM.

QtyPartRefs
2
AP2205-ADJ
U1, U2
2
LT8365
U3, U4
1
W25Q128JVS
U5
1
RP2040
U6
2
MCP4822
U7, U8
4
LMH6639
U9, U10, U11, U12
16
FMMT458TA
Q1, Q3, Q6, Q8, Q9, Q11, Q14, Q16 +8
16
FMMT558TA
Q2, Q4, Q5, Q7, Q10, Q12, Q13, Q15 +8
1
ABM8-272-T3
Y1
1
USB_C_RECEPTACLE_USB2.0_14P
USB_C_Receptacle_USB2.0_14P
J1
1
POWER INPUT
J2
1
OFFSET REFERENCE
J3
1
DEFLECTION OUT
J4
1
2A
F1
5
100K
100k
RV1, RV2, RV3, RV4, RV5
1
RESET
SW1
1
PROG
SW2
3
D
D1, D2, D3
4
LED
D4, D5, D6, D9
1
4.1V
D7
Show 29 more
QtyPartRefs
1
11V
D8
2
10U
10u
L1, L2
6
10U
10u
C1, C2, C3, C4, C11, C12
6
1n
C5, C6, C33, C36, C39, C42
4
1u
C7, C8, C21, C23
2
0.22U
0.22u
C9, C10
3
1u
C13, C14, C15
16
0.1U
0.1u
C16, C19, C20, C22, C24, C25, C26, C27 +8
2
15P
15p
C17, C18
4
2p
C32, C35, C38, C41
4
39P
39p
C34, C37, C40, C43
2
5.1K
5.1k
R1, R2
7
100K
100k
R3, R5, R8, R12, R13, R81, R82
1
19.7K
19.7k
R4
2
84.5K
84.5k
R6, R7
2
107K
107k
R9, R10
1
14.3K
14.3k
R11
1
162K
162k
R14
2
22
R15, R16
2
1MEG
1Meg
R17, R19
1
12.7K
12.7k
R18
1
6.3K
6.3k
R20
10
10K
10k
R21, R25, R29, R30, R42, R43, R55, R56 +2
2
1k
R22, R84
2
27.4
R23, R24
32
2k
R26, R27, R32, R33, R35, R36, R37, R38 +24
4
200K
200k
R28, R41, R54, R67
8
5k
R31, R34, R44, R47, R57, R60, R70, R73
4
220
R78, R79, R80, R83

Deflection amp 3 design files

The KiCad project lives in the Thinkpad4by3/chibitron repository on GitHub; these links point at the commit this page was built from.

Deflection amp 3: common questions

What microcontroller does the Deflection amp 3 use?

The Deflection amp 3 is built around the RP2040, from the RP2040/RP2350 family.

How big is the Deflection amp 3 PCB?

The Deflection amp 3 measures 100 × 86 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Deflection amp 3?

199 components, from 49 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 Deflection amp 3 design files?

From the Thinkpad4by3/chibitron repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the Deflection amp 3 design in my own project?

The repository has no license, so all rights stay with Thinkpad4by3. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Deflection amp 3 without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug RP2040/RP2350 firmware against it before you order a PCB.

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