• Onboard power regulation with external wall wart supply
• TTL Square wave buffered output
• Sine/Triangle output centred around 0V with buffered virtual ground (important for audio!)
• Onboard pots for amplitude and frequency adjustment
• Mode switch to switch between High and Low frequency outputs
• Much better signal routing to optimise output signal to noise ratio
• and much more..

Apologies for the lack of updates over the last month, I have had a lot on and haven't had time to put up some new stuff. But I have been working on an updated function generator, with a few new features and a cleaner design.

This design is for a simple crystal oscillator tester. When projects that use crystals don't work, it can be caused by a non working crystal. This circuit will let you check and eliminate dead crystals from your own projects.

If you have ever seen projects involving LED Matrix displays, wanted to know how they work, or how to use them in your own project then this guide is for you. The construction and operation of the LED matrix display will be explained, as well as various ways to control them.

 

Picture from Sparkfun Electronics