JY-MCU bluetooth module V4.0 alternative

Other Hardware General Electronics
1

Hello,

i was working with JY-MCU quite a lot. It's cheap enough and since i am usually working only with slave devices, it's a good choice (IMHO).

I am looking for cheap alternative, which would support bluetooth V4.0, but they are a lot more expensive. I found two modules but both without socket and power regulator (interface board).

http://www.ebay.com/itm/HM-10-CC2540-4-0-BLE-Bluetooth-to-UART-Transceiver-Module-Central-Peripheral-/231212878227?pt=LH_DefaultDomain_0&hash=item35d55c8993
or
http://www.fasttech.com/products/0/10004051/1292002-ti-cc2540-bluetooth-40-ble-2540-transparent-serial

Does anybody know for V4.0 module with interface board in (approximately) price range of JY-MCU?

2

Hello,

I think in this case you need a level converter between 5 and 3.3V. I have tried some thing like this to interface a sim card directly to the 5V microcontroller, at that time i used a simple level converter using a not gate 74HC04 and given 3.3V to this inverter IC, so 5V from the pic will be converted to 3.3V. You can also use a transistor drive circuit i have attached. I think it should work.

Circuit.png