[Practical judgment] Determine IC amplification and chip conversion rate
[Reliable pcb] Premium PCB material, excellent maintainability and interchangeability
[Compatible single op amp ] Supports LM741 LF356 NE5534 TL071 TL081 OP07
[Compatible dual op amp ] Supports LM358 NE5532 TL072 TL082 MC1458 RC4558 OP275 AD827
[Find low speed chips] Identifies disguised low speed chips

Spec:
Item Type: OP AMP Module
Material: PCB
Size: Approx. 93x58x17mm / 3.66x2.28x0.67in
Working Voltage: DC 12V
Working Current: More Than 100mA

Package List:
1 x OP AMP Module

How To Use:
Principle Description:
IC1a in the circuit is connected to a polyharmonic oscillator and an operational amplifier with a frequency of about 1 Hz. The of the inverting amplifier connected to unit gain is tested.
IC2 is an iso gate whose truth table is that the output is 1 when the two inputs are taken inversely.
So:
If the operational amplifier. Normally the points A and B of IC2 must be inverted so that C is 1. IC1b and 1d are still 1 afterward. so the yellow LED D3 is on;
If op amp. When the output is open circuited, point C of IC2 must always be 0. After IC1c it becomes 1, and the red LED D4 is on.
If the op amp is internally short circuited. When the output voltage is fixed positive or negative, the output of IC1c is also low frequency.

Note:
Manual measurement please allow some error.