We found this circuit in an Australian publication from 1991. It is a kit of the time with input for a guitar pickup. The range is a few tens of meters.
This grid dip meter was found in old American documentation. The range is from 350 kHz to 1700...
This astable NAND TTL provides complementary signals. The circuit must be powered with 5 V and...
This is a slightly different configuration of full-wave power control than we found in an old...