Using a 4046 PLL this circuit generates rectangular signals in three wavebands that depend on the capacitors used. The circuit is from a Radio Electronics from December 1989.
This circuit came out in a publication called Electronics Handbook of 1993. The circuit activates a...
We found this circuit in an old Argentine publication from the 1970s. The transistor can be the...
This circuit was suggested by Motorola in a 1969 publication. It makes use of components of the...