This power supply was obtained from an Electronic Design from the 90's. The circuit applies to other 3-terminal regulators. The maximum output current is 200 mA.
We found this circuit in the Texas Instruments optoelectronics manual. Field effect transistors can be...
This interesting circuit of an ancient American publication makes the pattern of an exclamation mark...
This two-digit timer was found in the 1983 Special Projects issue of Radio Electronics magazine. The...