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SwiftCarve Control

2 years ago 833
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This circuit powers an arm-mounted circular-saw that I developed for a mad doctor costume this last Halloween. Along with the spinning foam blade it also features a smoking effect, lights, and sound. It's all coordinated by an Arduino Nano mounted in this PCB.

WARNING: This board layout still has a bug in it. Two of the pins on the FQP30N06L mosfets are flipped. I let EasyEDA know about the issue and they've fixed it in the templates, but this original board layout still has the issue.

There's also an issue where I apparently ran a power line a bit close to some source of noise, so I ended up having to put a 470uF capacitor across the power lines into the LM386 to filter the power. You can see this reflected in the schematic but not the board layout.

You can find a video of the prop on YouTube. You can find the source code on Github. You can find the models on Thingiverse


Main Saw Control Board

Main PCB


ID Name Designator Footprint Quantity
2 -SPEAKER U2 CNT-KF301-2P 1
3 LM386 U1 DIP08 1
4 48R2UC09200-400 LED1,LED2,LED3 1X02 3
5 - U5,U6 CNT-KF301-2P 2
6 -Saw U7 CNT-KF301-2P 1
7 10KΩ R10,R11,R12,R3,R2,R1,R5,R13 AXIAL-0.4 8
8 150Ω R7,R6 AXIAL-0.4 2
9 10uF C2,C1 CAP-D8.0XF3.5 2
10 1uF C3 CAP-D8.0XF3.5 1
11 10k R4 1X03 1
12 5V Voltage Regulator REGULATOR 1X04_LONGPADS 1
13 SD Card Reader U4 1X06-KIT 1
14 Push Button SAW,SHOW 1X02 2
15 Header-Female-2.54_1x2 P2 HDR-1X2/2.54 1
16 2N5088 Q1 TO-92A 1
17 1KΩ R8 AXIAL-0.4 1
18 240Ω R9 AXIAL-0.4 1
19 Motor Voltage Control P3 HDR-3X1/2.54 1
20 Show Mode Control P1 HDR-2X1/2.54 1
21 470uF C4 CAP-D8.0XF3.5 1
22 FQP30N06L Q2,Q3,Q4 TO-220 3
23 1N5401 D1,D2,D3 DO-201AD 3


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