Yess… One more classic gadget added to my classic collections - ‘National Tape Recorder’. Accidentally I got this from shop near my house, shop man having habit of listening radio and having 4-5 other radios in his store room but all were not working. I bought this for 50 rupees, it was full of dirt-covered and i was not sure whether can be restored its functions or not. But one thing I really appreciated the make National because except speaker and AC power socket, rest everything was working properly.

Now I wanted to restore it and use it every day to listen music. Initially I replaced speaker and power socket. And to access digital audio files I added USB access module to the tape recorder. I have attached pdf file for the wiring and circuit diagram.

Used Items:

1. USB MP3 player main board
2. USB socket
3. Tactile switches - 4
4. Audio socket)
5. Slide switch
6. Copper bread board
7. Wires
8. Chrome vinyl film
9. Fast gum
10. Piece of foam board
11. Dirt cleaning solution
12. 4" Loud speaker
13. AC power plug socket

Electronic Components

1. IC - 7805
2. Capacitor - 220mf/50v - Electrolyte
3. .Capacitor -01mf - Ceramic

Tools

1. Soldering gun
2. Lead
3. Driller
4. Craft knife
5. Steel ruler

Check it out.