This series and parallel sensor circuit was found in Popular Electronics from the 1990s. Any SCR can be used and the supply voltage depends on the load.
September 2017 - Texas Instruments' new TPS720 and TPS720-Q1 low dropout voltage (LDO) linear...
November 2016 - Texas Instruments' new TLV8802 nano-power operational amplifiers for wireless...
This circuit was found in a 1969 Ferranti documentation. It can be implemented with modern...