The circuit in the figure uses two operational amplifiers: an LM101A and an LM102. Diodes admit equivalents and resistors do not have to be accurate. The power supply must be symmetrical.
Obtained from an English publication in the 1980s, when a weather station operated in that country at...
This sophisticated moving bar indicator circuit with the LM3915 is from a Radio Electronics...
This digital thermometer circuit with MA1026 module was found in February 1981 Radio Electronics...