JOUYI Operational Amplifier Op Amp Tester Single Op Amp Dual Op Amp TL071 TL072 TL081 TL082
- Common single-op-amp and dual-op-amp Screening circuit boards, finished boards, the circuit board can judge whether the IC can be used for amplification, and can roughly judge the conversion rate of the chip.
- IC1a in the circuit is connected to a multivibrator with a frequency of about 1Hz, and the OP Amp. to be tested is connected to a unity gain inverting amplifier working state. IC2 is an EX-OR gate, and its truth table is that the output is 1 when the two inputs are inverted. The design D3 is green, because the solder mask of the printed board is green and not eye-catching, so it is changed to a yellow LED.
- For chips with a low conversion rate, the status indicated by the LED is steady yellow, and red will flicker faintly. This can also be used to roughly judge the conversion rate of the chip. Because most of the motorcycle chips on the market use low conversion rate instead of high rate, it can also be judged whether the chip is counterfeit or not.
