Uploaded January 2025 | Updated September 2026, 2 weeks ago
Only $5 for 10 PCBs and every new member get $5 bonus. + Express 24 hour / 48 hour service on pcbway.com ➠ ➠ ➠ In this video, I showcase my custom-designed, portable audio signal generator. Built to run on batteries, this tool eliminates earth-ground referencing issues that plagued one of my previous projects.
Using traditional signal generators and scopes, I accidentally created ground loops that shorted parts of my circuit—this generator solves that problem completely.
Inspired by online designs but tailored to my personal needs, this simplified signal generator is compact, easy to use, and highly adaptable. The PCBs are available in the PCBWay share section, so you can customize it to your requirements and avoid similar challenges in your own projects. I also created a custom 3D-printed enclosure to make it fully portable and practical.
Watch as I explain the design, build process, and demonstrate its functionality in real-world applications.
I’ve provided everything you need to build your own, on my Google Drive, including:
✅ Gerber files
✅ Schematic
✅ 3D print files for a custom enclosure
Want to build it? Order the PCBs directly from PCBWay using the links below.
🔗PCBWay Shared Relay Board: pcbway.com/project/shareproject/EO_N_Audio_Signal_Generator_7f7b1f09.html
🔗 Google Drive Folder: drive.google.com/drive/folders/1HUyJhsA3oh_6MNTeAFmichm0mbrbKujv?usp=sharing
🎥 Other references mentioned in this video:
■ Elliot Sound Products link to Miniature Audio Oscillator:
sound-au.com/project86.htm
■ Wireless World article - Feb 1982:
worldradiohistory.com/UK/Wireless-World/80s/Wireless-World-1982-02.pdf
🙏 Want to support the channel? ●●●●●●
patreon.com/mcaldeira
paypal.me/macaldeira
#DIYTestEquipment #AudioSignalGenerator #PortableSignalGenerator
●●●● HUNDREDS OF OTHER VIDEOS TO CHOOSE FROM ●●●●
✿ DIY TEST GEAR: The title says it all:
youtube.com/watch?v=7buNHf6HoDw&list=PLy5M_tA9ux7KkjmWX0I0zNocg6NF33EfL
✿ RESTORATION BUILDING BLOCKS: A series of videos showing detailed steps used the restoration process of tube equipment:
youtube.com/watch?v=7xvTGd4ysRE&list=PLy5M_tA9ux7JSYx8z2mw303vx287LHpzf
✿ HowTo's: Various videos on some simple techniques and projects:
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✿ DIY CAPACITOR LEAKAGE TESTER PROJECT: One of the most viewed projects on my channel, with full design description and build instructions.
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✿ DIY TUBE TESTER PROJECT: Complete design description and build instructions for this really handy device.
youtu.be/3fCE4uaw_cU?si=BhCnTKKN2NQUDe6v
●●●● Plus full Playlists on some other completed restoration projects on this Channel ●●●●
📻 PHILIPS BX750A:
youtube.com/watch?v=i8U9Lteja5o&list=PLy5M_tA9ux7IG6XgctidGO0u0DeT3_CxF
📻 TELEFUNKEN OPUS 2114:
youtube.com/watch?v=_HO2bjY5vuw&list=PLy5M_tA9ux7LhcZ9h9plfTFmjaM1mcifu
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📻 GRUNDIG 3060A:
youtube.com/watch?v=7x2sK2GSYeE&list=PLy5M_tA9ux7L8e9h8lrHGREPqcgWO-YQm
📻 TELEFUNKEN OPERETTE 8:
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📻 LOEWE-OPTA TRUXA STEREO 4741W:
youtube.com/playlist?list=PLy5M_tA9ux7KhVk0KqPx0Wkh2KO_5f2fQ
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youtube.com/watch?v=fwmW9k3TwNE&list=PLy5M_tA9ux7L5sAApLzV6xoYzmRNJpMW5
📻 SABA FREIBURG W2:
youtube.com/playlist?list=PLy5M_tA9ux7IqvS-LshUGpE1D_WY6mrZe
📻 GRAETZ MUSICA 4R417:
youtube.com/playlist?list=PLy5M_tA9ux7Ios98E59dWjwc2SRJyxwIn
Only $5 for 10 PCBs and every new member get $5 bonus. + Express 24 hour / 48 hour service on pcbway.com ➠ ➠ ➠ In this video, I showcase my custom-designed, portable audio signal generator. Built to run on batteries, this tool eliminates earth-ground referencing issues that plagued one of my previous projects.
Using traditional signal generators and scopes, I accidentally created ground loops that shorted parts of my circuit—this generator solves that problem completely.
Inspired by online designs but tailored to my personal needs, this simplified signal generator is compact, easy to use, and highly adaptable. The PCBs are available in the PCBWay share section, so you can customize it to your requirements and avoid similar challenges in your own projects. I also created a custom 3D-printed enclosure to make it fully portable and practical.
Watch as I explain the design, build process, and demonstrate its functionality in real-world applications.
I’ve provided everything you need to build your own, on my Google Drive, including:
✅ Gerber files
✅ Schematic
✅ 3D print files for a custom enclosure
Want to build it? Order the PCBs directly from PCBWay using the links below.
🔗PCBWay Shared Relay Board: pcbway.com/project/shareproject/EO_N_Audio_Signal_Generator_7f7b1f09.html
🔗 Google Drive Folder: drive.google.com/drive/folders/1HUyJhsA3oh_6MNTeAFmichm0mbrbKujv?usp=sharing
🎥 Other references mentioned in this video:
■ Elliot Sound Products link to Miniature Audio Oscillator:
sound-au.com/project86.htm
■ Wireless World article - Feb 1982:
worldradiohistory.com/UK/Wireless-World/80s/Wireless-World-1982-02.pdf
🙏 Want to support the channel? ●●●●●●
patreon.com/mcaldeira
paypal.me/macaldeira
#DIYTestEquipment #AudioSignalGenerator #PortableSignalGenerator
●●●● HUNDREDS OF OTHER VIDEOS TO CHOOSE FROM ●●●●
✿ DIY TEST GEAR: The title says it all:
youtube.com/watch?v=7buNHf6HoDw&list=PLy5M_tA9ux7KkjmWX0I0zNocg6NF33EfL
✿ RESTORATION BUILDING BLOCKS: A series of videos showing detailed steps used the restoration process of tube equipment:
youtube.com/watch?v=7xvTGd4ysRE&list=PLy5M_tA9ux7JSYx8z2mw303vx287LHpzf
✿ HowTo's: Various videos on some simple techniques and projects:
youtube.com/watch?v=lgr-J_D6pSU&list=PLy5M_tA9ux7K3B77iUGyLPai3RIvJOrkO
✿ DIY CAPACITOR LEAKAGE TESTER PROJECT: One of the most viewed projects on my channel, with full design description and build instructions.
youtube.com/watch?v=0pySErvzUIY&list=PLy5M_tA9ux7KWexvEjLB0SANSxQXi0zTS
✿ DIY TUBE TESTER PROJECT: Complete design description and build instructions for this really handy device.
youtu.be/3fCE4uaw_cU?si=BhCnTKKN2NQUDe6v
●●●● Plus full Playlists on some other completed restoration projects on this Channel ●●●●
📻 PHILIPS BX750A:
youtube.com/watch?v=i8U9Lteja5o&list=PLy5M_tA9ux7IG6XgctidGO0u0DeT3_CxF
📻 TELEFUNKEN OPUS 2114:
youtube.com/watch?v=_HO2bjY5vuw&list=PLy5M_tA9ux7LhcZ9h9plfTFmjaM1mcifu
📻 SABA UW-175-Z 3D:
youtube.com/watch?v=cca4i60ZLw4&list=PLy5M_tA9ux7IWL18nsrSf4RnjsuPjHC-p
📻 GRUNDIG 1070:
youtube.com/watch?v=i4J5l0fwhko&list=PLy5M_tA9ux7JgnyYPRWOK763aJ8bg3iCI
📻 SCHAUB-LORENZ GOLDY 58 type 3020:
youtube.com/watch?v=RSbt7qVed78&list=PLy5M_tA9ux7IBse5G--Kl89SPS9sATXfZ
📻 BUSH VHF64:
youtube.com/watch?v=U--6JymkQ1M&list=PLy5M_tA9ux7KsvN5M48cX6cxN4jSz0s3X
📻 GRUNDIG 3060A:
youtube.com/watch?v=7x2sK2GSYeE&list=PLy5M_tA9ux7L8e9h8lrHGREPqcgWO-YQm
📻 TELEFUNKEN OPERETTE 8:
youtube.com/watch?v=5IsACM0mPzs&list=PLy5M_tA9ux7K3SXDv8Hu4uAyl1O7NE5dc
📻 GRAETZ SUPER 171W:
youtube.com/watch?v=MhG-CH0gqm4&list=PLy5M_tA9ux7IjUykGE8neJSI6GUxMl2YG
📻 LOEWE-OPTA MAGNET 3737W:
youtube.com/watch?v=ZSZBJ5sKQm8&list=PLy5M_tA9ux7J_hzDhnF8rs2c7wmgGfRlK
📻 BRAUN ATELIER 3:
youtube.com/playlist?list=PLy5M_tA9ux7L3k5nPRvrk1aH764QRCTqE
📻 LOEWE-OPTA TRUXA STEREO 4741W:
youtube.com/playlist?list=PLy5M_tA9ux7KhVk0KqPx0Wkh2KO_5f2fQ
📻 GRAETZ COMEDIA 616:
youtube.com/watch?v=fwmW9k3TwNE&list=PLy5M_tA9ux7L5sAApLzV6xoYzmRNJpMW5
📻 SABA FREIBURG W2:
youtube.com/playlist?list=PLy5M_tA9ux7IqvS-LshUGpE1D_WY6mrZe
📻 GRAETZ MUSICA 4R417:
youtube.com/playlist?list=PLy5M_tA9ux7Ios98E59dWjwc2SRJyxwIn
