This circuit was found in the November 1966 issue of Electronics Now magazine. It uses an LDR as a sensor and has a Bargraph scale with the well-known LM3914.
We found this circuit in an old American publication. It can be mounted with TIC106 type SCRs and...
This simple circuit has good gain and can be implemented with any general-purpose transistor. The...
This circuit was obtained from an Application Note from Linear Technology that manufactures the used...