This circuit with power MOSFETs was found in a 1980s Siliconix documentation. Equivalent MOSFETs can be used, as well as other transistors. Note the symmetric power supply.
This is one of the many 555 based car alarm circuits that we have on our website. We found it in a...
Suggested by the National Semiconductor in 1980s documentation, this circuit uses components from the...
The figure shows how to couple two CMOS circuits using an optical coupler to achieve isolation. The...