Using a 4046 PLL, which is uncommon today, this circuit was found in the October 1994 issue of Electronics Now magazine. The circuit can be modified by changing the capacitor.
The circuit shown in the figure can be used to detect the operation of infrared sources whose...
We found this circuit in the March 1993 issue of Electronis Now magazine. The circuit uses common...
Figure 1 shows a hal-wave voltage doubler operating with the Power-supply voltage. Output current...