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4 layers48.9 × 59.7 mmCncvac, the printed circuit board in 3D

Cncvac

gcormier/cncvac

This is a 433MHz ASK/FSK transmitter controlled by an ATTINY841.

Open in PCBKitView on GitHub.kicad_pcb
Size
48.9 × 59.7 mm
Copper layers
4
Thickness
1.62 mm
Parts
47
Nets
35
Pads
130
Tracks, vias
272, 53
Pours
1
Routed
Yes
KiCad
KiCad 9.0 (file 20241229)
Created
1 Jan 2025
Updated
26 Oct 2025

Overview

Cncvac is an open-source printed circuit board by gcormier, from the gcormier/cncvac repository on GitHub. It is a 4-layer board of 48.9 × 59.7 mm with 47 parts on 35 nets, routed with 272 tracks and 53 vias.

It is built around the ATTINY841-SSU, MICRF112YMM and EL357N-G, with the 1N5819WS among its other parts. Its parts include 14 capacitors, 12 resistors, 3 ICs, 3 connectors and 2 switches. It belongs with the AVR (ATmega, ATtiny) boards of this library.

Main components

4

README

readme.md

cncvac

Rendered ISO Image

This is a 433MHz ASK/FSK transmitter controlled by an ATTINY841.

It runs off regular AA/AAA batteries and can be used to control various devices like garage doors, gates, etc. The intent was to have it control my dust collection system in the shop which is using the iVac Pro system. The iVac Pro system is a great system but it is expensive and I wanted to have a cheaper alternative to control it, and the company did not offer a remote control that could be triggered from a logic signal. (They now sell one)

It has an opto-isolated input controlled by a 5-24V logic signal.

Case

This fits in a Hammond 1593P case and can use their battery holder as well.

Power Consumption

Transmitting

1mV = 1uA 1-3mA while transmitting

Power Consumption

Sleep/Idle

1mV = 1nA Better than 1.2uA while sleeping Based on the average capacity of two AA NiMH batteries, 2000mAh, this should last almost 200 years. Power Consumption

Parts

47
QtyValueFootprintReferences
7100kResistor_SMD:R_0402_1005MetricR1, R2, R8, R9, R10, R11, R12
4MountingHoleMountingHole:MountingHole_3.2mm_M3H1, H2, H3, H4
322kResistor_SMD:R_0805_2012MetricR3, R4, R5
3DNPCapacitor_SMD:C_0402_1005MetricC11, C12, C14
20Resistor_SMD:R_0402_1005MetricR6, R7
210pFCapacitor_SMD:C_0402_1005MetricC5, C13
218pFCapacitor_SMD:C_0402_1005MetricC8, C9
222pFCapacitor_SMD:C_0402_1005MetricC4, C6
10.1uFCapacitor_SMD:C_0402_1005MetricC3
10.1uF 50VCapacitor_SMD:C_0402_1005MetricC10
1100pF 50VCapacitor_SMD:C_0402_1005MetricC2
110uF 6.3VCapacitor_SMD:C_0402_1005MetricC1
113.56MHzCrystal:Crystal_SMD_3225-4Pin_3.2x2.5mmY1
11N5819WSDiode_SMD:D_SOD-323D1
1470nHInductor_SMD:L_0402_1005MetricL1
15VJumper:SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mmJP1
16.8pFCapacitor_SMD:C_0402_1005MetricC7
182nHInductor_SMD:L_0402_1005MetricL2
18MHzCrystal:Crystal_SMD_5032-2Pin_5.0x3.2mmY2
1ANTENNAcncvac:ANT-433-HETHAE1
1ATtiny841-SSPackage_SO:SOIC-14_3.9x8.7mm_P1.27mmU1
1AVR-ISP-6Connector_IDC:IDC-Header_2x03_P2.54mm_VerticalJ1
1BatteryConnector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_VerticalBT1
1EL357NPackage_SO:SO-4_4.4x3.6mm_P2.54mmU3
1MICRF112YMMPackage_SO:MSOP-10_3x3mm_P0.5mmU2
1SW_DIP_x05Button_Switch_THT:SW_DIP_SPSTx05_Slide_9.78x14.88mm_W7.62mm_P2.54mmSW2
1SW_SPSTButton_Switch_SMD:SW_Push_1P1T_XKB_TS-1187ASW1
1SolderJumper_3_Bridged12Jumper:SolderJumper-3_P1.3mm_Bridged12_RoundedPad1.0x1.5mm_NumberLabelsJP2
1TRIGConnector_Phoenix_MC:PhoenixContact_MC_1,5_2-G-3.81_1x02_P3.81mm_HorizontalJ2
1U.FLConnector_Coaxial:U.FL_Hirose_U.FL-R-SMT-1_VerticalJ3

Questions

How big is the Cncvac PCB?

It measures 48.9 × 59.7 mm and has 4 copper layers, 1.62 mm thick.

What parts does the Cncvac use?

47 parts, built around the ATTINY841-SSU, MICRF112YMM, EL357N-G and 1N5819WS. 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 Cncvac KiCad files?

From the gcormier/cncvac repository on GitHub, at the commit this page was made from: the board is pcb/cncvac.kicad_pcb and its schematic pcb/cncvac.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the Cncvac design in my own project?

Its repository states no licence, so its author keeps all rights: ask gcormier before reusing the design.

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