This circuit can keep a set of lamps on for up to 1 minute, time given by C2 and R2 that can be changed. The load depends on the relay. The circuit is old, from 1988 documentation, but totally viable today.
This simple circuit, powered by 4 batteries or 9 V battery, brings together several functions of...
Figure 1 shows how the 4029 can be connected to count up to 10 and also up to 18. If pin 9 is...
I found this circuit in an old English magazine from 1979, but it can be easily assembled with...