License

Public Domain

Recommend Projects

Transformerless Power Supplies and simulations - FAST

3 years ago 1934
  • Description
  • Documents
  • BOM
  • Attachments
  • Members
  • Comments

Description

These are transformerless power supplies that can feed 5V circuits with current consumption ranges from 20-30 mA to 80-100 mA. Check the C or R values and the configurations. You can simulate to measure supplied voltage and current. The model for Zener diode is on schematics for it. Change values and get your needed output current.

The bridged capacitive version worked fine for a 50mA circuit. The resistive version can reach more than this, but you need a power resistor (5W or more), it maybe too big and heat too much.

Let me know if you have suggestions or comments.

You can simulate in EasyEDA. All parts have the support. Transient Spice simulation is ready to work.

Mind that you need to take care with these circuits as they are directly connected to mains! Only do it if you know how to handle the security.

Documents

Transformerless Capacitive Power Source

Transformerless Power Source - Capacitor without Bridge

Transformerless resistive power source.

BOM

ID Name Designator Footprint Quantity
1 BZX5V1 D1 SOD123 1
2 60 V1 2P-5.0 1
3 270 R2,R1 R3 2
4 470u C2 CP_8X13MM 1
5 Ammeter A1 NONE 1
6 1N4001 D2,D3,D4,D5 DO35-7 4
7 1u C1 C1 1
8 0.47k R2 R3 1
9 1.5k R1 R3 1

Attachments

None

Members

Success
The owner does not allow comments in this project now

Comments (1)

Guest Reply

It shows you accurate results for your asking question about the wireless services and in some way satisfies you. you can use this portal at any time to know how to fix windows 10 mobile bluetooth audio devices and wireless displays connections details and easy to connect this function on your gadget.

goToTop
你现在访问的是EasyEDA海外版,使用建立访问速度更快的国内版 https://lceda.cn(需要重新注册)
如果需要转移工程请在个人中心 - 工程 - 工程高级设置 - 下载工程,下载后在https://lceda.cn/editor 打开保存即可。
有问题联系QQ 3001956291 不再提醒
svg-battery svg-battery-wifi svg-books svg-more svg-paste svg-pencil svg-plant svg-ruler svg-share svg-user svg-logo-cn svg-double-arrow
We use cookies to offer you a better experience. Detailed information on the use of cookies on this website is provided in our Privacy Policy. By using this site, you consent to the use of our cookies.