This signal conditioner humidity sensor was found in a 1980s Linear Technology documentation. The circuit uses components from the era that can be designed with modern equivalents.
The circuit is of the Motorola Linear Databook of 1990. The power source must be symmetrical and the...
This 6 V battery charger was found on a 1987 Hands On Electronics. Rc determines the charging...
This circuit is recommended by Texas Instruments in the datasheet of the TL317, equivalent to...