WWW.EEE-LAB.COM

Introduction:

This phone recorder project will enable you to record both sides of your telephone or mobile phone conversations. One constructed, this switch will allows you to automatically turn on your tape recorder or PC recorder or any recorder. when you pick up the handset of your telephone or mobile phone. Note that your recorder must have both a MIC socket and a REMOTE socket on it so that this device can plug into the recorder and control it. This circuit is designed to work for the newer 1.5V and 3V  recorders as well as the usual 6V or 12V ones.

Parts List:

Once completed, place your tape recorder next to the phone. Plug in the 2 sockets (MIC & REMOTE) into the recorder. Put in a cassette tape and push 'play'. If the device has been put together correctly either of two things will happen: the tape in the recorder will start to play or it will not.

1. If it does not play then pick up the phone handset. If the tape now starts to play then the device is working. Put the handset down, depress the play and record buttons and the tape will now record when the handset is raised.

2. If the tape plays then either of two things need adjustment:

a) move the position of the trim-pot across its range of positions and see if this stops the playing. If it does then lift the handset to see if the playing starts. It should. The device is ready for use.

b) if adjustment of the trim pot does nothing then the REMOTE switch needs to be switched to the other position. Do this and repeat the steps as outlined above.The device should now work.