This low power circuit was obtained from an American 80's documentation. The circuit indicates the voltage of a battery being trimmed by the trigger point. The transistors can be the BC549.
This circuit makes use of the Linear Technology LT6100. We find it in a 2005 company manual. The...
The gated oscillator shown here turns on when a “1" Iogic Ievel is applied to the input. The...
This is 4-input audio mixer using an integrated circuit 741 and two more operational amplifiers....