N° of component 

XTAL Tester (CB1517E )

    This circuit tests crystals up to a few megahertz with ease. The circuit is from a 1977 publication, and can use an equivalent transistor like 2N2222.


Circuit Bench

  • Shadow Relay (CB1305E)

         This well-known circuit triggers a relay when light striking the phototransistor is cut off. The...

  • TCA9548A 8-Channel I4C Switches

    July 2017 - Texas Instruments' new 8-channel digital switches for I2C applications can be found at...