2 layers96.3 × 98 mm
Aquarium
baranovskiykonstantin/aquarium
Control the lighting and the heating of the aquarium.
73 parts11
2 layers48.5 × 34.3 mm
2001captchpad
km4nfq/capacitive-touch-key4This key is based on the M0UKD Capacitive Touch Key described at:
- Size
- 48.5 × 34.3 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 21
- Nets
- 12
- Pads
- 41
- Tracks, vias
- 59, 8
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 28 Dec 2019
- Updated
- 3 Jan 2020
Overview
2001captchpad is an open-source printed circuit board by km4nfq, from the km4nfq/capacitive-touch-key repository on GitHub. It is a 2-layer board of 48.5 × 34.3 mm with 21 parts on 12 nets, routed with 59 tracks and 8 vias.
It is built around the AT42QT1011-MAH and IRFML8244TRPBF. Its parts include 7 connectors, 4 capacitors, 2 resistors, 2 ICs and 2 transistors.
Main components
2
AT42QT1011-MAH
UDFN-8-EP(2x2)-40℃~+85℃ 1.8V~5.5V 17uA Capacitive Touch、自动灵敏度校准、防水抗干扰触摸、接近检测 UDFN-8-EP(2x2) Touch Sensors ROHSMicrochip TechnologyTouch Sensors
IRFML8244TRPBF
SOT-231 N-channel 1.25W 110pF 2.35V 25V 41mΩ@4.5V 430pF 49pF 5.4nC@10V 5.8A N-Channel SOT-23 MOSFETs ROHSInfineon TechnologiesMOSFETs
README
README.mdCapacitive Touch Key
This key is based on the M0UKD Capacitive Touch Key described at:
https://m0ukd.com/homebrew/capacitive-cw-touch-key-circuits/
I modified the PCB to have through hole pads for the wiring.
This PCB can be ordered from OSH Park:
https://oshpark.com/shared_projects/urEWNyZZ
Bill Of Materials
2 - 22K Ohm resistors, SMD 1206, Thick Film (R1, R2)
2 - 0.1uF capacitors, SMD 1206 (C1, C3)
2 - 2.2nF capacitors, SMD 1206 (C2, C4)
2 - IRFML8244 MOSFETs, SMD SOT-23 (Q1, Q2)
2 - AT42QT1011 Touch sensors, SMD (U1, U2)
1 - Capacitive Touch Paddle PCB (from your favorite Fab House)
1 - TRS Stereo Plug, 3.5mm, solder type
1 - AA battery holder
2 - AA Cells
2 - Conductive Paddle Material (Acorn Nuts, Angle Brackets, Etc.)
X - 22 AWG Stranded Hook-up Wire
1 - Enclosure
Assembly
Power
J6 = +3V Battery (2 AA cells)
J7 = Battery GND
Keyer
J1 = Tip
J2 = Sleeve
J3 = Ring
Paddles
J4 = DIT
J5 = DAH
Components
C1, C3 = 0.1uF Capacitors (1206)
C2, C4 = 2.2nF Capacitors (1206)
Q1, Q2 = IRFML8244 MOSFET (SOT-23)
R1, R2 = 22K Ohm Resistors (1206) Thick Film
U1, U2 = AT42QT1011 Touch Sensor (6-pin, Dot on Pin 1)
Parts
21| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | MountingHole | MountingHole:MountingHole_2.5mm | H1, H2, H3, H4 |
| 2 | 100nF | Capacitor_SMD:C_1206_3216Metric_Pad1.42x1.75mm_HandSolder | C1, C3 |
| 2 | 2.2nF | Capacitor_SMD:C_1206_3216Metric_Pad1.42x1.75mm_HandSolder | C2, C4 |
| 2 | 22K | Resistor_SMD:R_1206_3216Metric_Pad1.42x1.75mm_HandSolder | R1, R2 |
| 2 | AT42QT1011 | Package_TO_SOT_SMD:SOT-23-6_Handsoldering | U1, U2 |
| 2 | IRFML8244TRPBF | Package_TO_SOT_SMD:SOT-23 | Q1, Q2 |
| 1 | + | Connector_Wire:SolderWirePad_1x01_Drill1mm | J6 |
| 1 | - | Connector_Wire:SolderWirePad_1x01_Drill1mm | J7 |
| 1 | DAH | Connector_Wire:SolderWirePad_1x01_Drill1mm | J5 |
| 1 | DIT | Connector_Wire:SolderWirePad_1x01_Drill1mm | J4 |
| 1 | GND | Connector_Wire:SolderWirePad_1x01_Drill1mm | J2 |
| 1 | RING | Connector_Wire:SolderWirePad_1x01_Drill1mm | J3 |
| 1 | TIP | Connector_Wire:SolderWirePad_1x01_Drill1mm | J1 |
Questions
How big is the 2001captchpad PCB?
It measures 48.5 × 34.3 mm and has 2 copper layers, 1.6 mm thick.
What parts does the 2001captchpad use?
21 parts, built around the AT42QT1011-MAH and IRFML8244TRPBF. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the 2001captchpad KiCad files?
From the km4nfq/capacitive-touch-key repository on GitHub, at the commit this page was made from: the board is 2001captchpad.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the 2001captchpad design in my own project?
Its repository states no licence, so its author keeps all rights: ask km4nfq before reusing the design.
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