| Using a National LM39 l l IC, a l mA meter and a few resistors it is a simple matter to construct a thermometer to measu...
| Using a National LM39 l l IC, a l mA meter and a few resistors it is a simple matter to construct a thermometer to measu...
| This candle is a simple electronic toy. It can also be used for conjuring tricks. The circuit is designed around an incan- descen...
| The starting point for design of this electronic candle was a desire to reduce the fire risk associated with the Christmas season, at t...