Using the LM3914 this unusual digital clock uses a Bargraph LED indicator. The LEDs are the segments of a 7-segment display. We found it in February 1980 Radio Electronics magazine.
This amplifier became famous in the 1970s, it was sold in kit by Ibrape, Philips subsidiary for...
This circuit was found in documentation from Analog Devices from the 90s. The circuit uses...
A double relay reed is used to obtain the latched drive in this 1980 configuration. The circuit can...