This analog meter circuit was found in the September 1989 issue of Radio Electronics magazine. The source must be dual, and the table gives the resistors for the various scales.
This simple AM transmitter for very small ranges uses in the original version of the 1970s, a...
The HA2620 integrated circuit used in this comparator is from the 80's, but the setting can be...
Figure 1 shows a circuit than can be used as time stage in timers, and other applications....