This is a typical circuit of a PROM programmer from the 70s. It appeared in the magazine Radio Electronics in 1979. Note that the programming was done manually byte by byte using switches.
This configuration is from a 1987 publication, but it can be easily assembled today, as the...
This circuit can be seen in several publications of the same time. The circuit is an application note...
A new version of the previous circuit triggered by the negative transition of the input signal is...