Feature: 1. TEST OBJECT: This is an op amp tester that can be used to test common chips for single op amp(Mono), double op amp and quad op amp. The circuit board can determine whether the IC can be used for amplification, and the conversion rate of the chip can be roughly judged. You can spot low speed chips that in the disguise of as high speed chips 2. OUTPUT MODE: For high speed op amp, can output normally when input high and low frequency square signal, as the corresponding red LED and green LED synchronization, steady on(200KHZ or bright (10HZ)) 3. OUTPUT DISPLAY: For low speed op amp, when input square signal, the output end can not complete the output waveform, as shown by the corresponding red LED can not be lit normally, only one or two are not lit. Only when the low frequency signal is input can be output normally, and the corresponding red LED at the output end can flash synchronously with the green LED 4. TEST CURRENT: A test terminal is provided on the board to test the static current of the op amp under plus or minus 5V power supply. Through the static current size, you can also understand some characteristics of the operating amplifier, and distinguish the model 5. STABLE PCB: Operational amplifier test board adpot stable PCB material, possess excellent maintainability and interchangeability, rest assured to use Specification: Item Type: Operational Amplifier Test Board Size: Approx. 9.5x5.8cm / 3.74x2.28in Power Requirement: Voltage: DC12V, Current: 100mA Application: For Single OP AMP Models: LM741, LF356, NE5534, TL071, TL081, 0P07 and other standard single OP AMP packages For Double OP AMP Models: LM358, NE5532, TL072, TL082, MC1458, RC4558, 0P275, AD827 and other standard double OP AMP packages For Quad OP AMP Models: LM324, TL074, TL084, LF347, AD713. Package List: 1 x Test Board Note: Testing Instructions: 1. Only test one chip at a time. Use one of the three test sockets. 2. For static current testing, use the DC voltage meter of the digital multimeter. Test the voltage across 10 ohms, 1=V/10 (ma). For example, V=15MV, static current 1=1.5 ma. (At this time, do not press the red switch on the right side of the diagram). 3. The test end can be connected to an oscilloscope or frequency counter. Adjust the potentiometer to change the test frequency.