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ISD1820-based voice recording and playback module This small module can record and play back up to 10 seconds of audio by default, although this can be changed by varying the value of one resistor. See the article on the Junk Mail Repeller in the August 2019 issue for more details. Also used in the July 2021 Model Railway Level Crossing project. Cat No SC5081. Price: AUD $7.50 1  Add to trolley In stock: yes (16 available). Estimated dispatch time: 1-3 days Related to: Project: “HEY! THE SIGN SAYS NO JUNK MAIL!” (August 2019 [print issue] [online issue]) Project: Model Railway Level Crossing (July 2021 [print issue] [online issue]) Project: Automatic Train Controller (October 2022 [print issue] [online issue]) Other items relevant to these projects: Automatic Train Controller: Automatic Train Control PCB [09109221] ($2.50) Add to trolley Chuff Sound PCB [09109222] ($2.50) Add to trolley PIC16F1455-I/P programmed for the Automatic Train Controller (0910922A.HEX) ($10.00) Add to trolley PIC12F675-I/P programmed for the Chuff Sound module (0910922C.HEX) ($10.00) Add to trolley Firmware for the Automatic Train Controller (0910922A/C.HEX) (Free) Add to trolley Auto Train Control and Chuff Sound Generator PCB patterns (PDF download) [09109221/2] (Free) Add to trolley Model Railway Level Crossing: Model Railway Level Crossing PCB [09108211] ($5.00) Add to trolley Pair of PIC12F617-I/P chips for the Model Railway Level Crossing [0910821A/B/C.HEX] ($15.00) Add to trolley (with default options) Firmware, source code and sound recording for the Model Railway Level Crossing [0910211A-C] (Free) Add to trolley Model Railway Level Crossing PCB pattern (PDF download) [09108211] (Free) Add to trolley Mechanical diagrams and label artwork for the Railway Level Crossing (PDF Download) (Free) Add to trolley