LTSpiceIV, available from Linear Technology, allows you to construct moderately complex 555 driven circuits including common components such as capacitors, resistors, diodes, FETs, and more.

Our Circuit Design Calculators for Engineers and Students are free-to-use tools that help you quickly determine key parameters ...

Above you can see one of the example circuits provided to help show the power of the application. You can build your schematic (perhaps you want to try [Jeri’s] psu shut-off timer?) in the ...