General Electric suggests this circuit in an 80's documentation. The circuit makes use of PUTs that are not common components today. Note the timing components that may change.
This circuit was found in a 2006 publication. It uses discrete components and CMOS that are still...
Found in a Popular Electronics from the 90s, this circuit can be used as an electrifier. T1 can be...
This is one of the first amplifier circuits using an integrated CA3020 from RCA in the 1960s. The...