Operational amplifiers (op amps) have 2 inputs that determine the output voltage.
- Noninverting input (+) voltage higher than inverting input (-) voltage = High output.
- Noninverting input (+) voltage lower than inverting input (-) = Low output
High output means the voltage is as close to the positive supply voltage as it can get. A low output means the output is as close to the negative supply voltage as it can get.
Affiliate link ad. Kit I bought and use often these days for common integrated circuits.
- Brief look at discovered problems with using LM358 op amp as a single supply comparator
- Brief inverting op amp comparator circuit – LM358
- Brief Schmitt trigger LM358 op amp comparator circuit
- Brief voltage follower using single supply op amp LM358 operational amplifier circuit
- Brief single supply op amp current source – LM358 operational amplifier
- Quick zener diode improved by NPN BJT emitter follower circuit – 2N3904 bipolar junction transistor
- Brief passive buzzer controlled by 555 timer astable multivibrator set by light dependent resistor LDR circuit
- Brief light dependent resistor LDR controlled astable multivibrator mode 555 timer circuit
- Brief active buzzer component introduction
- Brief zener diode component voltage reference and shunt regulator basics
- Information on this site is not guaranteed to be accurate. Always consult the manufacturer info/datasheet of parts you use. Research the proper safety precautions for everything you do.