Uploaded April 2025 | Updated September 2026, 2 weeks ago
A loud, clear earphone from easily available parts that cost less than half a dollar! It can be build without any specialized tools. Today we will build a crystal radio earphone using only cheap, common parts; no 3D printing required! This simple DIY project uses a small plastic funnel, a rubber ear tip from common earbuds, a 27mm piezoelectric emitter, and some basic wiring to create a clear and low-cost earphone for crystal radios. We walk through every step: drilling for strain relief, trimming the funnel tip for comfort, soldering the piezo element, and gluing it all together. The result? A comfortable, high-performing earphone that costs less than $1 to make, delivers better low-frequency response than most store-bought crystal radio earpieces, and is perfect for DIY electronics, vintage radio builds, or off-grid listening projects. Whether you’re a radio hobbyist, a maker, or just curious about low-tech audio solutions, this project proves you don’t need expensive gear to get great results.
MATERIALS
- Funnel 30 mm diameter
- Piezo element 27 mm
- Rubber ear tip from earphones
- Twisted pair wire (DIY)
- Glue
RELATED VIDEOS (including this one):
Crystal Radio Earphone From Common / Cheap Stuff youtu.be/dWkKFD_yZs8
Crystal Radio--DIY Crystal Earphone youtu.be/ARtfLB0nQ5k
Crystal Radio--Bad Earphone Diagnosis & Fix (Remix Pts 1-3) youtu.be/D9HVJ5GOaEE
Crystal Radio Headphone--DIY Part 1/2 youtu.be/oG5cDi9Va_Q
Crystal Radio Headphone Mod--DIY Part 2/2 youtu.be/v_9InMj-eL8
WARNING: Soldering involves high temperatures which can lead to burns, fire, & death. Solder contains lead which is a known toxin. If you don’t know, learn or don’t do it.
Disclaimer: This information is presented as entertainment only on an "as is" basis and any use the viewer makes of it is solely up to them, and it is their responsibility to determine if the information remains current and if it is applicable to their situation. The viewer is responsible for any and all safety involving this. Viewing this video is the viewer's agreement to these terms and conditions. If you do not agree, stop now.
#CrystalRadio #DIYElectronics #RadioHack #HomemadeEarphone
A loud, clear earphone from easily available parts that cost less than half a dollar! It can be build without any specialized tools. Today we will build a crystal radio earphone using only cheap, common parts; no 3D printing required! This simple DIY project uses a small plastic funnel, a rubber ear tip from common earbuds, a 27mm piezoelectric emitter, and some basic wiring to create a clear and low-cost earphone for crystal radios. We walk through every step: drilling for strain relief, trimming the funnel tip for comfort, soldering the piezo element, and gluing it all together. The result? A comfortable, high-performing earphone that costs less than $1 to make, delivers better low-frequency response than most store-bought crystal radio earpieces, and is perfect for DIY electronics, vintage radio builds, or off-grid listening projects. Whether you’re a radio hobbyist, a maker, or just curious about low-tech audio solutions, this project proves you don’t need expensive gear to get great results.
MATERIALS
- Funnel 30 mm diameter
- Piezo element 27 mm
- Rubber ear tip from earphones
- Twisted pair wire (DIY)
- Glue
RELATED VIDEOS (including this one):
Crystal Radio Earphone From Common / Cheap Stuff youtu.be/dWkKFD_yZs8
Crystal Radio--DIY Crystal Earphone youtu.be/ARtfLB0nQ5k
Crystal Radio--Bad Earphone Diagnosis & Fix (Remix Pts 1-3) youtu.be/D9HVJ5GOaEE
Crystal Radio Headphone--DIY Part 1/2 youtu.be/oG5cDi9Va_Q
Crystal Radio Headphone Mod--DIY Part 2/2 youtu.be/v_9InMj-eL8
WARNING: Soldering involves high temperatures which can lead to burns, fire, & death. Solder contains lead which is a known toxin. If you don’t know, learn or don’t do it.
Disclaimer: This information is presented as entertainment only on an "as is" basis and any use the viewer makes of it is solely up to them, and it is their responsibility to determine if the information remains current and if it is applicable to their situation. The viewer is responsible for any and all safety involving this. Viewing this video is the viewer's agreement to these terms and conditions. If you do not agree, stop now.
#CrystalRadio #DIYElectronics #RadioHack #HomemadeEarphone
