Level Indicator (CB4890E)

This 3-step level indicator uses only passive components. LEDs are common and trimpots can be 4k7 which a current commercial value.

TLVx376 Precision Operational Amplifiers (COM184E)
January 2017 - Texas Instruments' new TLVx376 series precision operational amplifiers can now be...
Low Power CMOS Alarm (CB4779E)
We found this circuit in a 90's Radio Electronics. The low power circuit activates a 12 V relay...
Simple Amplifier Stage (CB232E)
This simple stage can operate with low frequency signals (audio), driving a small lodspeaker....