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Description: Ultra-small dynamic microphone preamplifier with dual-channel design, suitable for single-cell lithium battery power supply, using Philips original TDA1308 operational amplifier, suitable for low-voltage power supply (3V-6V).
Note:
This microphone amplifier board does not have a power supply voltage regulator circuit. When using it, it can only be powered by a battery or a linear regulated power supply, not a switching power supply, otherwise there will be interference. If you request a return with this question, it will not be returned or exchanged. Please pay attention when purchasing!
Working voltage: DC: 3v-6v
Board size: 33mm*20mm
Note:
If only one channel is needed, the input of the other channel needs to be connected to GND (ground)
Short circuit (to avoid interfering signals coming in)
The board does not have a regulated power supply. It is best to use a bent voltage power supply or battery power supply when installing, otherwise there may be interference.
If you feel that the default magnification is inappropriate, you can change the magnification by yourself, as follows:
Magnification adjustment:
R7 and R5 are the magnification setting resistors. You can change the magnification according to your own needs. The resistance can be selected from 5K-47K. The larger the resistance, the higher the magnification. If you use plug-in resistors, you can remove the original chip resistors. Solder the plug-in resistance to the pads reserved at both ends of the patch position.
1Pcs TDA1308 Micro Preamplifier Board 2 Channel Audio Module DC 3-6V DIY |
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1.We believe our items are so outstanding. We are convinced you will be happy with your Purchase.
2. Please include your eBay ID and item number with any email requests.
3. If you do not satisfy with our items. Please simply return to us within 30 Days in original condition. Just pay for the returned postage. Then we can issue full refund or resend the item to you after the returned item arrived at our warehouse.
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Il 08-mar-21 alle 05:00:23 CET, il venditore ha aggiunto le seguenti informazioni sull'oggetto: