Earphone portable Circuit using 1 transistor HEP 230

Earphone portable Circuit using 1 transistor HEP 230
Portable 3v Headphone Amplifier
How to make Audio power Amplifier and Repairing
Earphone portable Circuit using 1 transistor HEP 230
Earphone portable Circuit using 1 transistor HEP 230
Portable 3v Headphone Amplifier