We found this circuit in the June 1991 issue of Radio Electronics magazine. The integrated circuit is still available. The table gives the component values.
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...