HardLabs

Function-Generator

MUDAL·Function-Generator·PCB/function_generator/function_generator.kicad_pcb

Function-Generator PCB layout, top view — open source STM32 board by MUDAL
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About the Function-Generator PCB

Function-Generator is an open source STM32 PCB design by MUDAL, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 65 × 85 mm, with 30 components from 22 distinct parts.

Its main chip is the STM32 Blue Pill, from the STM32 family. Other key parts include the LM358, L7805, LM6171 and TL071. By type, the board carries 8 resistors, 7 connectors, 5 ICs, 5 capacitors, 2 transistors and 1 switch.

It belongs with the power & battery and test & measurement designs in this gallery.

From the project

Custom Function Generator designed and developed by Olaoluwa Raji. This project is a complete embedded system solution with both hardware and software implemented by me. Relevant reference materials are included.

This custom function generator is capable of outputting sine, square, and triangle waves of variable amplitude and frequency. An extra requirement of this device is its ability to produce DC voltages of adjustable magnitude and polarity.

Function-Generator, from the project README
From the project README

Main components on the Function-Generator

LM358STM32 Blue PillL7805LM6171TL071

Function-Generator bill of materials (BOM)

30 components, 22 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
LM358
U1
1
STM32 Blue Pill
U2
1
L7805
U3
1
LM6171
Texas Instruments
U4
1
TL071
U5
1
TIP41
Q1
1
TIP42
Q2
2
Barrel_Jack
J1, J7
1
Buttons
J2
1
LCD
J3
1
Selector
J4
1
AD9833
J5
1
50-ohm BNC
J6
2
10K
10k
RV1, RV2
1
SW_SPDT
SW1
2
470UF
470uF
C1, C2
2
0.33UF
0.33uF
C3, C4
1
0.1UF
0.1uF
C5
2
10K
10k
R1, R2
2
22K
22k
R3, R5
Show 2 more
QtyPartRefs
2
2k
R4, R6
2
1k
R7, R8

Function-Generator design files

The KiCad project lives in the MUDAL/Function-Generator repository on GitHub; these links point at the commit this page was built from.

Function-Generator: common questions

What microcontroller does the Function-Generator use?

The Function-Generator is built around the STM32 Blue Pill, from the STM32 family.

How big is the Function-Generator PCB?

The Function-Generator measures 65 × 85 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Function-Generator?

30 components, from 22 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the Function-Generator design files?

From the MUDAL/Function-Generator repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the Function-Generator design in my own project?

Yes, under the terms of its GPL-3.0 license, which MUDAL chose for the repository.

Can I test firmware for the Function-Generator without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug STM32 firmware against it before you order a PCB.

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