The transistor used in this circuit is uncommon today. AC124 or equivalent such as AC188K and 2N2431 can be used. The circuit is from the 80's and makes use of transformers.
August 2017 - The new LZ400UB00 ultraviolet LEDs from Engin LEDs with wavelengths of 385 -410 nm...
This circuit for the positive front of a rectangular signal was found in an old documentation, but applies...
TTL square signals can be divided by 10 using this circuit. The maximum frequency depends on the...