Found in documentation from the 1990s, it uses a sound effects integrated circuit, the SN7677 from Texas Instruments. Unusual component these days.
Although this version of electric fence is quite sophisticated due to the number of components it uses and...
Using the M1575 this switching converter was found in National Semiconductor documentation from...
This circuit was obtained from a 1985 Electronic Desing. The circuit uses a Darlington which may be...