DC-DC Step Down/Step Up Converter 1.8V-5V to 3.3V CC1101 Wifi Bluetooth ESP8266
ab 1,19 €
Wirels Module,NRF24L01 CC1101 CC2500 etc. Low-power wireless module : CC1101 CC2500 Nrf24l01+. Low Power Wifi Module:ESP8266. 0.9-5V to 5V. INPUT above 3V, OUTPUT 3.3V 400-500MA;. 1.8-5V to 3.3V(Step down&step up).
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