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introduction Using the patch process, the power input to increase the rectifier bridge, you can AC and DC, the input DC do not have a positive and negative, and more convenient to use. Performance is more stable. NE5532 version: using the new original NE5532 op amp chip, the use of round hole 8 feet IC socket, easy to upgrade the op amp chip. AD828 version: the use of patch op amp, if you want to effect, and do not want to replace the op amp chip, choose this is better. Two versions in addition to the op amp chip, the other materials are basically the same: the input coupling capacitor using imported brands Promise capacitor, the board with a single power supply, a regulator chip, easy to match with a single power amplifier. If you think the default magnification is not appropriate, you can change the magnification, the operation is as follows: Magnification adjustment: R7, R5 is the magnification set resistance (delivery default is about 5 times to enlarge, according to their own needs to change the magnification, resistance can be selected from 5k-47k, the greater the resistance, the higher the magnification, if Is to use plug-in resistors, you can remove the original chip resistors, the plug-in resistance welding in the patch position on both sides of the pad) Operating voltage DC 9v-24v Exchange: 8v-16v Board size 50mm * 33mm
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