HardLabs

Calculator

pparent76·Librecalc-Hardware·proto1-Imx233LQFP/calculator.kicad_pcb

Calculator PCB layout, top view — open source PIC board by pparent76

About the Calculator PCB

Calculator is an open source PIC PCB design by pparent76, published on GitHub. It is a 4-layer board measuring 99.8 × 49.9 mm, with 146 components from 41 distinct parts.

Its main chip is the PIC16F722A, from the PIC family. Other key parts include the IMX233, DDR_SDRAM_MT46_X16 and 7805CALC. By type, the board carries 52 switches, 48 capacitors, 18 resistors, 8 connectors, 7 diodes and 5 ICs.

From the project

Hardware of the librecalc project

Main components on the Calculator

IMX233DDR_SDRAM_MT46_X167805CALCPIC16F722A

Calculator bill of materials (BOM)

146 components, 41 distinct parts.

QtyPartRefs
1
IMX233
IC1
1
DDR_SDRAM_MT46_X16
IC2
1
CONN_MICROSD
U1
1
7805CALC
U2
1
PIC16F722A
U3
1
24MHz
X1
1
CONN_30
P1
1
CONN_5
P2
2
CONN_4
P3, P5
1
CONN_2
P4
1
CONN_4
P6
2
CONN_2
P7, P8
2
2.2µF
Creg5v_in1, Creg5v_out1
1
0.22µF
Creg5v_pump1
1
Jumper-2
JP1
1
REG710
Reg5v1
2
SWITCH_INV
SW1, SW3
1
SWITCH_PUSHBUTTON
SW2
49
B
SW11, SW12, SW13, SW14, SW15, SW16, SW17, SW21 +41
1
CONN_1
reg_5v1
Show 21 more
QtyPartRefs
1
ZENER
D1
1
DIODE
D2
3
LED
D3, D4, D5
1
D_SCHOTTKY
D6
1
DOUBLE_SCH_KCOM
D7
1
15uH
L1
2
10pf
C1, C2
6
1uF
C3, C7, C20, C22, C24, C42
15
100nF
C4, C5, C6, C8, C11, C12, C13, C15 +7
16
22uF
C9, C14, C16, C17, C19, C23, C27, C28 +8
1
100nf
C10
1
1uF
C21
6
100nF
C29, C30, C31, C32, C33, C34
1
100pF
C52
5
4.7k
R1, R4, R8, R9, R18
3
10k
R2, R5, R6
3
47k
R7, R10, R20
2
1k(1%)
R11, R12
3
100
R13, R17, R19
1
1K
R14
1
100k
R15

Calculator design files

The KiCad project lives in the pparent76/Librecalc-Hardware repository on GitHub; these links point at the commit this page was built from.

Calculator: common questions

What microcontroller does the Calculator use?

The Calculator is built around the PIC16F722A, from the PIC family.

How big is the Calculator PCB?

The Calculator measures 99.8 × 49.9 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Calculator?

146 components, from 41 distinct parts. The full bill of materials is listed on this page.

Where can I download the Calculator design files?

From the pparent76/Librecalc-Hardware repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Calculator design in my own project?

The repository has no license, so all rights stay with pparent76. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Calculator without the hardware?

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

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