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Dew-Controller

kuellenberg·Dew-Controller·Hardware/Dew-Controller/Dew-Controller.kicad_pcb

Dew-Controller PCB layout, top view — open source board by kuellenberg

About the Dew-Controller PCB

Dew-Controller is an open source PCB design by kuellenberg, published on GitHub. It is a 2-layer board measuring 100 × 50 mm, with 92 components from 42 distinct parts.

Other key parts include the MCP1703A-5002_SOT89, MAX232, SIP32419, INA180-A2 and LM358. By type, the board carries 26 capacitors, 26 resistors, 11 transistors, 9 diodes, 8 ICs and 8 connectors.

It belongs with the sensors, science & space and displays & leds designs in this gallery.

From the project

Dew heater controller for telescope dew heater straps

Microcontroller based project to control dew heater straps used on a telescope.

Since the controller has to be capable of measuring the current on each heater channel, the circuit comprises a TI INA180 high side current sense amplifier. To reduce cost and complexity, only a single amplifier is used and firmware measures the current of each channel sequentially. As for overcurrent and short circuit protection, an integrated solution is used. The Vishay SiP32419 is a load switch with programmable current limit up to 3.5A and eliminates the need for a conventional fuse (for which you'll never…

Dew-Controller, from the project README
From the project README

Main components on the Dew-Controller

MCP1703A-5002_SOT89MAX232SIP32419INA180-A2LM358PIC16(L)F15354_28DIP_SOIC_SSOPOLED-012N002A

Dew-Controller bill of materials (BOM)

92 components, 42 distinct parts.

QtyPartRefs
2
MCP1703A-5002_SOT89
U1, U7
1
MAX232
U2
1
SIP32419
U3
1
INA180-A2
U4
1
LM358
U5
1
PIC16(L)F15354_28DIP_SOIC_SSOP
U6
1
OLED-012N002A
U8
6
SI2369DS
Q1, Q4, Q5, Q8, Q9, Q11
5
BSS138
Q2, Q3, Q6, Q7, Q10
1
POWER
J1
1
RS232
J2
1
Temp
J3
1
ICSP
J5
1
CH1
J6
1
CH2
J7
1
CH3
J8
1
CH4
J9
1
3A
F1
1
50mA
F2
1
Lemonhead
G1
Show 22 more
QtyPartRefs
1
Rotary_Encoder_Switch
SW1
1
15V
D1
1
15V, 3W
D2
1
BAT54S
D3
2
5V6
D4, D5
4
SMAJ12A
D6, D7, D8, D9
8
10uF
C1, C5, C16, C17, C20, C21, C23, C24
5
1uF
C2, C3, C4, C7, C8
6
10nF
C6, C9, C10, C12, C22, C26
5
100nF
C11, C13, C14, C15, C19
1
1uF
C18
1
100nF
C25
2
4R7
R1, R3
1
0R05
R2
1
2k8
R4
1
150k
R5
1
47k
R6
8
10k
R7, R17, R18, R19, R20, R21, R22, R25
1
100k
R8
5
100R
R9, R10, R13, R14, R23
5
10k
R11, R12, R15, R16, R24
1
470R
R26

Dew-Controller design files

The KiCad project lives in the kuellenberg/Dew-Controller repository on GitHub; these links point at the commit this page was built from.

Dew-Controller: common questions

How big is the Dew-Controller PCB?

The Dew-Controller measures 100 × 50 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Dew-Controller?

92 components, from 42 distinct parts. The full bill of materials is listed on this page.

Where can I download the Dew-Controller design files?

From the kuellenberg/Dew-Controller repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Dew-Controller design in my own project?

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

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