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Voice Message Recorder / Player
Posted on Tuesday, April 13, 2010   •   Category: Audio DAC


The voice messages are recorded into the on-board microphone, then each message can be individually triggered by an external signal. The inputs can respond to simple electrical contacts, logic levels or voltages, and all inputs are debounced to prevent false triggering by electrical noise. Each message can be arranged to play once on a selected change of input state (high-to-low or low-to-high), or to repeat continuously until the trigger condition is removed. These options are selected by DIP switches.


PAL/NTSC Video Text Generator
Posted on Monday, April 12, 2010   •   Category: PIC


Perfect low cost solution for: * New video security installations * SSTV transmitters * Amateur video * Existing installed security installations * Scientific experimentation monitoring * and any other application that needs the time and date recorded on an image!


40MHz 32 Channel Logic Analyser
Posted on Monday, April 12, 2010   •   Category: Test and Measurement


This project was published in Electronics Australia in Oct/Nov 96. It is a 32 Channel, 40Mhz, fully PC controlled TTL/CMOS logic analyzer with internal/external triggering and trigger delay. Internal triggering is fully maskable (High/Low/Don't Care) on all 32 channels. The whole things fits on one single sided PCB with virtually no wiring!


20MHz High Speed Function Generator
Posted on Monday, April 12, 2010   •   Category: Frequency Wave Generators


The High Speed Function Generator was published in the professional electronics section of the Aug 1996 issue of Electronics Australia, and has proven to be extremely popular. The kit is no longer available from any of the kit suppliers. The project is capable of generating 20MHz or greater Sine, Square, Triangle, and TTL waveforms.


UV LED Controller using a PIC 16F628A Microcontroller
Posted on Saturday, April 10, 2010   •   Category: PIC


If you need an UV LED timer, or a timer for any other purpose you may be interested in the UV LED Controller that was constructed using a PIC 16F628A Microcontroller. There is a schematic and code available however the original project was not documented in English. Have a look at the Google translation that did a decent job of translating this one.


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