Miscellaneous circuits
Mini telephone exchange using a uniselector
"Build this automatic telephone exchange" Extract from Electronic Australia July 1974
Mini telephone exchange using a uniselector
"Build this automatic telephone exchange" Extract from Electronic Australia July 1974
electronics_australia-1974-07-1us_exch.pdf | |
File Size: | 832 kb |
File Type: |
Telephone intercom unit
"Build this telephone intercom" Extract from Silicon Chip May 1992
"Build this telephone intercom" Extract from Silicon Chip May 1992
telephone_intercom_scmay92__c_.pdf | |
File Size: | 5629 kb |
File Type: |
Greig Sheridan (the 1992 author) and Ross Herbert collaborated in this 2021 update of the intercom. Published in Silicon Chip: here