Model Boat Mayhem

Mess Deck: General Section => Model Boating => Topic started by: satinseat on November 04, 2013, 12:21:29 pm

Title: Midway Model gunfire sound unit - need wiring help please
Post by: satinseat on November 04, 2013, 12:21:29 pm

found a 20 year old gunfire module (2 sounds, machine gun and cannon) I got from Midway Models and am stuck because no instructions and a wire off battery box (corroded but can be replaced.)

anyone know what the 5 (should there be 5 or 6) wires coming from the chip connect to please? battery +-, speaker+-, switch for sound effect, etc

please if you remember or will I blow up the chip by experimenting?

regards
ian

Title: Re: Midway Model gunfire sound unit - need wiring help please
Post by: steamboatmodel on November 04, 2013, 02:16:51 pm

If there are numbers on the chip you might be able to find a pinout on line that will give you the battery connections.
Regards,
Gerald.

Title: Re: Midway Model gunfire sound unit - need wiring help please
Post by: malcolmfrary on November 06, 2013, 09:56:37 am

If its an 8 pin chip, they usually follow a common pattern.  If you find an example of one, it should help simplify the reverse engineering needed to figure out which wire goes where.  To sort out the power, there is usually an electrolytic capacitor across the power rails - find that, you will be half way there.  A typical example on here - http://www.zen22142.zen.co.uk/Circuits/Music/sound_effects.htm (http://www.zen22142.zen.co.uk/Circuits/Music/sound_effects.htm) - different sounds, of course, but the principal applies.