cyrusthevirus
New Member
I am trying recreate a circuit I found online. The circuit is used to measure the electrical connectivity in a liquid. The circuit below also requires a probe and volt meter/pic to read the output. I have created a list of parts and just want to make sure I got them correct. The post I found online was from back in 2006 and my attempts to reach the person who created have been unsuccessful.
In addition to the parts below, What is D3? I believe it is a bridge rectifier. Can anyone suggest a part number or specs I should look for?
Finally from what I can tell the circuit appears to be fed by +12VDC and -12VDC. I plan to get this from a +12VDC circuit and a NJU7662 power inverter.
The specs are here:
https://media.digikey.com/pdf/Data%20Sheets/NJR%20PDFs/NJU7662.pdf
Here are the parts:
R1 1K (1/4W)
R2 1K (1/4W)
R3 56K (1/4W)
R4 33K (1/4W)
R5 100K (1/4W)
R6 1K (1/4W)
R7 6.8K (1/4W)
R8 22K (1/4W)
R9 1K (1/4W)
R10 220K (1/4W)
R11 220K (1/4W)
R12 220K (1/4W)
R13 100K (1/4W)
R14 100K (1/4W)
R15 82K (1/4W)
U1 TL074
V1 100K (trimmer resistor) (1/4W)
V2 2K (trimmer resistor) (1/4W)
V3 22K (trimmer resistor) (1/4W)
C1 .015uF (ceramic)
C2 .015uF (ceramic)
C3 .22uF (ceramic)
D1 In4733A
D2 In4733A
R200 3.9K (1/4W)
C200 10uF (ceramin)
D200 In4150
D201 IN4150
In addition to the parts below, What is D3? I believe it is a bridge rectifier. Can anyone suggest a part number or specs I should look for?
Finally from what I can tell the circuit appears to be fed by +12VDC and -12VDC. I plan to get this from a +12VDC circuit and a NJU7662 power inverter.
The specs are here:
https://media.digikey.com/pdf/Data%20Sheets/NJR%20PDFs/NJU7662.pdf
Here are the parts:
R1 1K (1/4W)
R2 1K (1/4W)
R3 56K (1/4W)
R4 33K (1/4W)
R5 100K (1/4W)
R6 1K (1/4W)
R7 6.8K (1/4W)
R8 22K (1/4W)
R9 1K (1/4W)
R10 220K (1/4W)
R11 220K (1/4W)
R12 220K (1/4W)
R13 100K (1/4W)
R14 100K (1/4W)
R15 82K (1/4W)
U1 TL074
V1 100K (trimmer resistor) (1/4W)
V2 2K (trimmer resistor) (1/4W)
V3 22K (trimmer resistor) (1/4W)
C1 .015uF (ceramic)
C2 .015uF (ceramic)
C3 .22uF (ceramic)
D1 In4733A
D2 In4733A
R200 3.9K (1/4W)
C200 10uF (ceramin)
D200 In4150
D201 IN4150