CH340E Schematic USB Serial Arduino#
From: CH340E Schematic USB Serial Arduino
here are various types of variants of the CH340 USB Serial chip, namely CH340G, CH340C, CH340B, CH340T, CH340N, CH340K, and CH340E.
CH340G is the variant most often used in Arduino clone because it is cheap, but this variant requires an external crystal. There are also variants that already have internal crystals in them, including the CH340E, CH340N, CH340C, CH340K, and CH340B. One of them already has an internal EEPROM, namely CH340B.
CH340 Driver#
This CH340 can be used with various OS such as Windows 10 / 8.1 / 8/7 / VISTA / XP, Server 2016/2012/2008/2003, 2000 / ME / 98, Linux, and Mac.
You can download the driver directly according to the OS you have below.
If the link above doesn’t work. you can visit the CH340 download page here.
CH340 Schematic#
In this article, I will share the CH340E circuit (CH340 Schematic). I have tried this circuit on the board that I made (in the photo above) to send and receive data.
On the next page, I provide a complete schematic of this CH340E IC.
Here is the CH340E circuit that I have tried and I created this circuit using the KiCad application.
In the circuit above, I used a 1k2 resistor for the LED. Generally, the LED uses a 330 Ohm resistor, but because I use a 330-ohm resistor SMD LED it makes the LED very bright, so I change the LED resistance to 1.2K Ohm.
In this circuit, I also provide a poly fuse for circuit protection. I did not give the value because it depends on usage. If you want to secure the circuit only 1A, then use a poly fuse with a maximum current of 1A and so on.
For the reset pin, please do not remove the 10uF capacitor, because this is very useful in the process of resetting and uploading data.
Read more: CH340 dev ttyUSB not showing Linux, but detected in terminal
CH340 Datasheet#
I hope this article is useful.