Catherine Sui
NE5532+TPA6120 Earphone Amplifier
Open source: GPL 3.0
Step 1: Description
1 Positive and negative double power input, LM317 and LM337 linear voltage stabilizer chip, voltage adjustable, TVS protective device, and power supply slow start are added in the power supply.
2 Ear amplifier adopts input of 3.5mm headphone interface, the output of 6.35mm headphone interface, two-stage amplification, 2 times of NE5532 amplification, 1 time of TPA6120 amplification.
3 The actual capacitance can be chosen according to the situation, the test function can be used, the effect is very good with low sensitivity earphone
Step 2: Power Part Schematic Files
All the schematic files are edited by EasyEDA, It is a free Online PCB design Tool which can generate Gerber files to JLCPCB, you can get your PCB sample manufactured by $2 for 5 pcs.
Step 3: Amplifier Schematic File &PCB Design File
All the manufacture files enclosed can be modified if there is anything that needs to be modified.
Técnico Solar Boat
ElectroBoy
mbsg99
hesam.moshiri
The NE5532 is pretty ubiquitous these days. It's been around for a long time so it's cheap, but also versatile, readily available, and the specs are pretty good. Certainly much better than the venerable LM741. Obviously, there are many newer designs with much better performance if needed in particular applications (eg LME49720, etc)… albeit for 10 times the cost. On the other hand, the LM741 is still perfect for many jobs.