The circuit in the figure uses two operational amplifiers: an LM101A and an LM102. Diodes admit equivalents and resistors do not have to be accurate. The power supply must be symmetrical.
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...