You can eliminate the 1K resistor Rin and the
1K on the output of the op amp at point B
The max output at point B is likely 3.7 volts not 5.7

Thanks I’ll have a look

 

You can eliminate the 1K resistor Rin and the
1K on the output of the op amp at point B
The max output at point B is likely 3.7 volts not 5.7

Thanks I’ll have a look
I have removed them and just wired through In “ iCircuit” . Yes the voltage is 3.2-3.7.
cheers

 

I don't see how the first opamp can work on a single supply. Any voltage on the inverting input drives it to the ground rail. The inputs need to be reversed?

 

I don't see how the first opamp can work on a single supply.

It's a common type transimpedance amplifier. From the spec sheet.

 

The photodiode is not working as "photo-conductive" and does not conduct a reverse-biased leakage current. Instead it is "photo-voltaic" and becomes a tiny solar cell and produces a small negative current which causes the opamp output to go positive.

I think your simulation software says "error" because it never learnt anything about a photodiode..

 

The photodiode is not working as "photo-conductive" and does not conduct a reverse-biased leakage current. Instead it is "photo-voltaic" and becomes a tiny solar cell and produces a small negative current which causes the opamp output to go positive.

I think your simulation software says "error" because it never learnt anything about a photodiode..

The photodiode is not working as "photo-conductive" and does not conduct a reverse-biased leakage current. Instead it is "photo-voltaic" and becomes a tiny solar cell and produces a small negative current which causes the opamp output to go positive.

I think your simulation software says "error" because it never learnt anything about a photodiode..

I think you may be right about “ learning about a photodiode “ . I have already asked the developer to include photodiodes and phototransistors and Optocouplers. A significant oversight in my books!

 

It's a common type transimpedance amplifier. From the spec sheet.
View attachment 232493

The lm324 can work from 3-32v on a single supply according to Texas Instruments

 

The lm324 can work from 3-32v on a single supply according to Texas Instruments

All supplies are "single supplies": they supply two power rails with a ∆V across them. The difference between opamps its whether they can sense voltages near the power rails.
Dual supply = cannot sense near either rail
Single supply = can sense near one rail (usually the ground rail) but not the other
Rail-to-Rail = can sense near both rails