opamp comparator tester

[Gwil]

The schematic shown in post #10 has to be powered by two separate batteries with a common 0V, as it does't include any means of holding a 0V rail midway between the + and - rails. So each battery needs its own switching pole.
The design could be run from a single supply with a single pole switch if a potential divider plus op amp buffer was added to create an artificial 0V.

[dbanner]

This is good tester for "good/bad". I like it very much for testing salvaged part or batch of op amps. I would place S1 on pcb.
Ground can remain connected. Only battery + need switch.

[kt315]

sch

[kt315]

there are 4 tipo with different pin step size... https://www.alibaba.com/product-deta...889407864.html
https://www.ebay.com/sch/i.html?_odk...ntary&_sacat=0

[dbanner]

YES, this is the one. Mounted on pcb. Your work is very good KT315.

[kt315]

DB

is this type you meant? https://www.ebay.com/itm/10Pcs-Minia...UAAOSwpDdVdk3I

[dbanner]

Very good. Suggestion: Maybe use a momentary push button for S1. "PUSH TO TEST"

[kt315]

your suggestions?

[kt315]

lay in a stage

[kt315]

did some revision

[kt315]

sch

[kt315]

thinking to do it. i read again very much problems and people are not able to fix them.
so that will give a chance. i did not checked this schematic and doing as-is.