Peckforton Light Railway: How I modified a cheap greetings card sound module to provide sound for a small diesel loco
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60 Seconds Re-recordable Sound Module DIY Greeting Card Chip Voice Recording Player Sound Module for DIY Cards/Toys: Amazon.co.uk: Home & Kitchen
Recordable Greeting Card Module, 4mins Sound Module Light Sense High Sound Quality Voice Sound Record Chip for DIY Audio Cards Easy to Record (Play it again): Amazon.co.uk: Stationery & Office Supplies