The integrated circuit used is no longer common today. The circuit is from Motorola's 1990 Linear Databook. The characteristics are given in the table.
Using red LEDs with ignition voltages of the order of 1.5 V we can make a multiple voltage...
a This circuit was obtained from a 1978 Practical Wireless. It causes a low-power 1.5V lamp to...
The circuit presented was taken from an old English publication in 1981, but it can be easily...