We all know that 20th-century electronic devices are worked in 5-Voltage and more than that and 21st century starts and running on below 5Volts I mean 3.3V and 1.8V so we need to make a logic converter here like a bridge between 5V to 3.3V devices to operate or may be to control. Here the fig shown below is act as a logic converter from 5V to 3.3V. The BSS138 is a MOSFET if not available that equivalent MOSFET is 2N7000 so no need to worry about it make a change and work it out. These converters are used for engineering projects, domestic applications, used as hobbies, mini projects, prototypes, and etc applications.
Circuit diagram for 5V to 3.3V logic converter:
- On top of the image shown in below you have to connect 3.3V & 5V voltage source (power supply)
- Tx-3.3V is from Arduino, Raspberry pi, ESP8266, and Intel boards.
- Tx-5V to be connected with peripheral devices like relay, ULN2003, and driver circuits and actuators
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| 5V to 3.3V logic converter |
Pin diagram of BSS138:
The pin diagram shows the internal and type of package available in market. Click here to download the Datasheet for BSS138
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| Pin Diagram of BSS138 MOSFET |
Pin diagram of 2N7000:
There is an another way to make the circuit with 2N7000 MOSFET. Because the BSS138 is not available in local area electronics so this 2N7000 is an equivalent for the BSS138 with same functionalities. There is no external diode need for this MOSFET because in this BSS138 and 2N7000 has In-built Freewheeling diode. This circuit can be utilized for Arduino to Raspberry pi, ESP8266, Bluetooth HC-05 module, all external modules which are working under 3.3V can be interfaced with this 3.3V to 5V logic converter.
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