This 1802 based music box plays several tunes encoded in EPROM. The speaker is driven by the Q line which is connected to a simple transistor circuit (visible at the top of the picture). The system too has been scavenged for parts. Note: I cannot remember why I would have painted the speaker white
This is an 1802 based telephone dialer. The Q line drives a relay via a transistor circuit. The relay generates dial pulses. Telephone numbers are input via push button switches connected to the EF lines. Needless to say this system is no longer functional.
One of several single board computer (SBC) 1802 systems used to control something or other around the house. This board has been scavenged for parts