I need some help wiht the below circuit. I would like to have the op amp used as a comparator to switch the BJT and oper

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answerhappygod
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I need some help wiht the below circuit. I would like to have the op amp used as a comparator to switch the BJT and oper

Post by answerhappygod »

I need some help wiht the below circuit. I would like to have
the op amp used as a comparator to switch the BJT and operate the
relay. With hysteresis trigger of 690 ohms and a set point of 600
ohms, I cannot seem to get it working. Can you please show me where
I have gone wrong.
I Need Some Help Wiht The Below Circuit I Would Like To Have The Op Amp Used As A Comparator To Switch The Bjt And Oper 1
I Need Some Help Wiht The Below Circuit I Would Like To Have The Op Amp Used As A Comparator To Switch The Bjt And Oper 1 (27.75 KiB) Viewed 41 times
VCC 12V νcc 12V K1 R4 R3 6900 Key=A D1 (1N4004G 1kΩ 55 % U1A EDR201A12 Q1 2N2222A LED1 R6 1kΩ LM324) Σ Σ (R1 1kΩ R5 1kΩ R2 600Ω VEE -12V R8 25kΩ R7 1kΩ
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