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Operational , Find Low Speed Chips Industrial Single Dual OP AMP  For TL071 TL072 TL081 TL082

<ul><li>PRACTICAL JUDGE: Single op amp and dual op amp screening circuit board, the circuit board can judge whether the IC can be amplified, and can roughly judge the conversion rate of the chip</li><li>SINGLE OP AMP MODELS: Support single op amp and dual op amp test, support LM741, LF356, NE5534, TL071, TL081, OP07 and other standard package single op amp</li><li>DUAL OP AMP MODELS: Support LM358, NE5532, TL072, TL082, MC1458, RC4558, OP275, AD827 and other standard package dual op amps</li></ul>

Specification: Item Type: Operational Material: PCB Product Size: Approx. 92 x 57 x 17mm / 3.62 x 2.24 x 0.67in Working Voltage: DC 12V Working Current: More than 100mA Principle Introduction: IC1a in the circuit is connected to a multivibrator and an operational with a frequency of about 1Hz. The working state of the inverting connected to the unity gain to be tested. IC2 is an EX OR gate whose truth table is that the output is 1 when the two inputs are inverted. So: If the op amp. Normal, point A and point B of IC2 must be reversed, so C is 1, and it is still 1 after IC1b and 1d, so the yellow LED D3 is on; If the op amp. When the output is open, the C point of IC2 must be 0 all the time. After passing through IC1c, it becomes 1, and the red LED D4 is on. If the op amp is shorted internally. With the output voltage fixed as positive or negative, the output of IC1c is also a low frequency square wave of 1Hz, and the red and yellow LEDs will flash alternately. For chips with lower slew rates, the status indicated by the LED is always yellow, with a faint red flash. This can also be used to roughly judge the conversion rate of the chip. Since most of the second hand chips on the market use low conversion rates rather than high conversion rates, it is also possible to judge whether the chips are counterfeit. The Actual Test Low Conversion Rate Chips Such As: OP07, LM741, the yellow light is always on, the red light is slightly on. The Actual Test of High Conversion Rate Chips Such As: TL071, NE5534, MC34071 and other chips, the yellow light is always on, and the red light is off. Single Op Amp Models: LM741, LF356, NE5534, TL071, TL081, OP07 and other standard package single op amps. Dual Operational Models: LM358, NE5532, TL072, TL082, MC1458, RC4558, OP275, AD827 and other standard package dual operational amplifiers. Package List: 1 x Operational Note: This board is only for use by those with professional electronic knowledge, do not provide operation guidance and technical support. Beginners please do not buy.