So this is something i would like to get in working order before summer comes. I experimented a little with the inputs meant for recording auxiliary audio to a cassette.

I have no use for a cassette deck, so i soldered some wire to the aux inputs and added a 3,5mm trs input where there used to be a tape counters reset button. i also took apart most of the decks workings and ended up to short the wires leading to the decks contacts, meant to tell the blaster when play is pressed.The result is that the audio is turned on when record is pressed down.

Next i ripped wires off the cassette heads and soldered them to the 6.35 mm input I put next to the smaller connector to create some sort of overdrive input to play guitar trough. It ended up sounding nice and warm!

First I have had a thought in my head that i would insert that 7,2Ah lead-acid battery somewhere inside where the compartment for D-cell batteries is. The blaster already has a cord for 220v and also a 12v input for an adapter where the 12 volt battery would connect nicely. The trouble is i havent got any idea how i could charge the battery at the same time when the blaster is in use. I have some knowledge about charging lead-acid batteries, but since i am just starting to experiment with electrical components, i have no idea how to incorporate that into the blasters workings so some advice is welcome.

Second I found this sandisk 8gb mp4 player that i would like to integrate on the tape decks lid