TDA7021 (or KA22429) BP machine type FM receiver board kit
Product code: B21bt
The receiving board is a kit, you need to weld and debug by yourself, the board kit does not have a matching shell!Our kit products only provide paper materials, not electronic documents, please forgive me!
Classic primary frequency conversion low-IF FM receiver board(TDA7021/ or KA22429)The kit helps to learn and master the working principle of a frequency conversion low-IF FM reception and triode audio power amplification. Refined single panel, including a 9018 antenna amplifier circuit.
The board consists of FM receiver integrated TDA7021T (or KA22429) and a M28S triode audio power amplifier circuit and a level Antenna amplifier circuit composed of 9018. The headphone cable doubles as a receiving antenna without noise suppression. Dimensions: 5x5x1cm, working voltage 3V, working frequency is continuously adjustable within 88-108MHZ, and it can also be adjusted outside this section by itself. Supporting circuit schematic diagram, installation diagram and debugging instructions.Please note: The board does not support the switch plastic keys, frequency adjustment knob and volume adjustment knob, and does not support earphones. If you need these, please purchase a BP shell and earphones separately, or try your own. Thank you!
The following are the supporting circuit schematic diagrams and the thumbnails of the installation drawings. The actual delivery is paper and clearer:
Circuit schematic diagram:
Installation drawing:
The picture of the finished board after installation is as follows:
The following is related product information:
If you want to buy a circuit board(PCB board)Please click on the following link:
http://item.taobao.com/item.htm?spm=a1z10.5.w4002-2498222905.15.kaxidy&id=7706179165
If you want to buy a finished board, please click the following link:
http://item.taobao.com/item.htm?spm=a1z10.5.w4002-2498222905.42.VmSqC7&id=6113547151
The board is also available for finished machines, please click on the following link:
http://item.taobao.com/item.htm?spm=a1z10.5.w4002-2498222905.38.3Pnfzt&id=115093849
And machine kit supply(Note: The machine kit includes a shell and earphones):
http://item.taobao.com/item.htm?spm=a1z10.5.w4002-2498222905.12.cvRVeV&id=7522060729