The EasyEDA "Tesseract" DIY Guitar Practice Amplifier is an LM386 based low power amplifier designed to deliver up to about 500mW into an
8 Ohm speaker when run from a 9V battery.
**Tesseract can be heard on YouTube here:**
The design given here - which includes a complete PCB design and Bill of Materials - is highly flexible and allows the several options...
THIS IS AN SMD LM386 CIRCUIT. IT CAN BE USED LIKE A WALKIE TALKIE BUT WITH A MUCH MORE CLEAR SOUND.CONNECT A ELECTRET CONDENSOR MICTO THE "IN" PIN AND "GND" AND FIX A SPEAKER TO THE OUTPUT END.(IF U WANT, CONNECT A LONG WIRE TO THE MIC OR SPEAKER) AND SPEAK THROUGH THE MIC.ITS A REAL FUN AND CHEAP CIRCUIT TO PLAY WITH.
This is a miniature 0.7W amplifier with adjustable bass boost, gain, and volume controls. Uses 1/8" (3.5mm) headphone jacks on the input and output. Powered by USB or 9v (4-12 VDC, max of 15 VDC). I designed it to use film capacitors and Nichicon audio grade electrolytic capacitors wherever possible in order to preserve the signal and reduce noise. An isolated power supply such as a battery is...
Simulations of - and a copy of the EasyEDA LM386EE spice model used in - each of the major stages used in the EasyEDA Tesseract DIY Guitar Practice Amplifier:
which includes a complete PCB design and Bill of Materials.
The EasyEDA "Tesseract" Guitar Practice Amplifier is an LM386 based low power amplifier designed to d...
A comparison between the EasyEDA LM386 improved spice model
and the "NO-FRILLS LM386 MODEL" by Dave Dilatush 5/30/95.
The EasyEDA LM386EE/NJM386EE spice subcircuit model is a
new model developed for EasyEDA by signality.co.uk
The LM386EE subcircuit is featured in the **Tesseract Guitar Practice Amplifier simulation files**:
The MIT License (MIT)
Copyright (c) 2016 Bart Falzarano
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to per...
Three simple ways to voltage control the gain of an LM386.
1) Using a JFET as an AC coupled variable resistor from pin 1 to ground.
This works reasonably well and has relatively low distortion.
Vishay AN105. FETS as voltage controlled resistors.
2) Using an NPN BJT in place of a JFET. This works but produces relatively...