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‎README.md‎

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[![Version: 1.0 Release](https://img.shields.io/badge/Version-1.0%20Release-green.svg)](https://github.com/0x007e/wfg) ![Build](https://github.com/0x007e/wfg/actions/workflows/build.yml/badge.svg?branch=main) [![License CC By-NC-SA](https://img.shields.io/badge/Hardware-CC--BY--NC--SA--4.0-lightgrey)](https://creativecommons.org/licenses/by-nc-sa/4.0/legalcode)
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# `WFG` - Waveform Generator (Signalgenerator)
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The `WFG` is a board with an [LM324](#additional-information) or any other 2-channel operational amplifier. The board itself is driven with a voltage of `5V`. It generates a triange and a pwm signal. Both signals can be adjustet through the onboard trimmer. When the board is connected to a voltage source the `green` led signals the readiness.
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Optional the generated signals can be readin with an external interrupt and a internal running timmer on a microcontroller and status data can be sent to a terminal over UART. A demo how this can be done is attached and can be tested with an [ATmega16A](#additional-information).
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> This design is derived form Analog Devices. Details can be found [here](https://www.analog.com/en/resources/design-notes/pulsewidth-modulator-operates-at-various-levels-of-frequency-and-power.html)
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| Experience | Level |
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|:------------|:-----:|
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| Soldering | ![?%](https://progress-bar.xyz/20?progress_color=00ff00&suffix=%20Medium&width=120) |
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| Software | ![?%](https://progress-bar.xyz/30?progress_color=0000ff&suffix=%20Low&width=120) |
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# Downloads
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| Type | File | Description |
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|:---------:|:------------------:|:-------------------------|
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| Simulation | [asc](https://github.com/0x007E/wfg/raw/refs/heads/main/WFG.asc) | LTSpice Simulation |
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| Lochmaster | [lm4](https://github.com/0x007E/wfg/raw/refs/heads/main/WFG.LM4) | Stripe grid circuit board |
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| Schematic | [pdf](https://github.com/0x007E/wfg/releases/latest/download/schematic.pdf) / [cadlab](https://cadlab.io/project/29870/main/files) | Schematic files |
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| Board | [pdf](https://github.com/0x007E/wfg/releases/latest/download/pcb.pdf) / [cadlab](https://cadlab.io/project/29870/main/files) | Board file |
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| Drill | [pdf](https://github.com/0x007E/wfg/releases/latest/download/drill.pdf) | Drill file |
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| Gerber | [zip](https://github.com/0x007E/wfg/releases/latest/download/kicad.zip) / [tar](https://github.com/0x007E/wfg/releases/latest/download/kicad.tar.gz) | Gerber/Drill files |
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| Firmware | [zip](https://github.com/0x007E/wfg/releases/latest/download/firmware.zip) / [tar](https://github.com/0x007E/wfg/releases/latest/download/firmware.tar.gz) | Demo Firmware for ATmega16 |
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# Hardware
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The pcb is created with `KiCAD`. All files are built with `github actions` so that they are ready for a production environment.
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## PCB
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The circuit board is populated on one side. The best way for soldering the `SMD` components is within a vapor phase soldering system and for the `THT` components with a standard system.
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### Top Layer
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![Top Layer](https://github.com/0x007E/wfg/releases/latest/download/top.kicad.png)
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### Bottom Layer
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![Bottom Layer](https://github.com/0x007E/wfg/releases/latest/download/bottom.kicad.png)
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# Configuration
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Within the different trimmers the waveforms can be adjustet in height, frequency and duty cycle.
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# Software
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The demo firmware (`ATmega16A`) of the `WFG` can be used to measure the frequency and duty cycle of the generated PWM signal and transmit the data over uart to a terminal.
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## Dataflow diagram
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![Dataflow](./images/dataflow.png)
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# Additional Information
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| Type | Link | Description |
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|:----------:|:------------------:|:-------------------------|
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| LM324 | [pdf](https://www.ti.com/lit/ds/symlink/lm324.pdf) | Quad operational amplifier |
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| ATmega16A | [pdf](https://ww1.microchip.com/downloads/en/devicedoc/atmel-8154-8-bit-avr-atmega16a_datasheet.pdf) | Microchip ATmega16A Datasheet |
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---
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R. GAECHTER

‎images/dataflow.drawio‎

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‎images/dataflow.png‎

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