This high input impedance circuit is suggested by Motorola's 1993 Linear Interface ICs. The power supply must be symmetrical. The circuit has a differential input.
The 4028 CMOS IC not only contains the complete decade counter, but also the 7-segment decoder...
If the reader is skilled, he can mount this spy micro-transmitter with SMD components and obtain an...
This negative bias circuit provides negative voltages from 3.5 to 6.5 V sources. The circuit was...