Uploaded August 2013 | Updated September 2026, 2 weeks ago
Made this a long time ago. I added a standard headphones jack to this hands free kit. I an unable to show you the exact points to solder to and it varies with the device. You can find this by having the device on and checking different points on the board until you hear music. Use a radio or other device you don't care about. put your ground to the battery's ground an try points near the amplifier IC. If you hear music crystal clear with no distortion you may have the right points. Now check your audio connections for voltage leak. The easiest way to do this is to plug in an audio cable and touching the other end to your tongue, if you feel a small shock then there is a leak.Check your connections. Do this over and over again until you hear music out of the speaker and do not feel any voltage over the audio cable. I hope you like this hack, Stay tunes for more.
Made this a long time ago. I added a standard headphones jack to this hands free kit. I an unable to show you the exact points to solder to and it varies with the device. You can find this by having the device on and checking different points on the board until you hear music. Use a radio or other device you don't care about. put your ground to the battery's ground an try points near the amplifier IC. If you hear music crystal clear with no distortion you may have the right points. Now check your audio connections for voltage leak. The easiest way to do this is to plug in an audio cable and touching the other end to your tongue, if you feel a small shock then there is a leak.Check your connections. Do this over and over again until you hear music out of the speaker and do not feel any voltage over the audio cable. I hope you like this hack, Stay tunes for more.
