$35 DIY Ball Vape/ E-Nail Power Supply

This post is about the guts found in the typical Chinese ball vape/e-nail power supply. Q-Shop, B2CVape, Mini Nail, etc all have the same parts.

Specs about the temp controller:

1. Relay J1 alarm output; relay J2 contact PID output

2. Two relay alarm outputs; one SSR level contactless PID output

3. Two relay alarm outputs; one SSR level difference control output

4. Relay J1 alarm output; relay J2 hysteresis control output

PID self-tuning function, automatically adapt to the controlled object

The meter can display the temperature value in degrees Celsius or Fahrenheit

Technical parameters

1. Working power: AC / DC85 ~ 260V (other power can be customized)

2. Input signal: thermocouple: T, R, J, B, S, K, E, WRe3-WRe25

Thermal resistance: Pt100, Cu50

3. Power consumption: less than 2W

4. Sampling rate: 4 times / second

5. Display color: Red LED (other colors can be customized)

6. Display range: full range of input signal

7. Accuracy: 0.2% FS ± 1 word

8. SSR level: DC 8V / 30mA

9. Contact capacity: AC250V / 3A; DC24V / 5A

10. Operating environment: 0 ~ 50 ℃; ≤ 85% R


You will need to modify the back plate of the enclosure with a Dremel to fit the power plug, switch, and xlr plug.

Controller: https://www.aliexpress.us/item/3256801489570326.html
Box: https://www.aliexpress.us/item/3256803564752582.html
20mm Coil: https://www.aliexpress.us/item/3256806203828482.html
XLR Female: https://www.aliexpress.us/item/3256804030639653.html
Switch and Female Plug: https://www.aliexpress.us/item/3256803937652000.html
110v US Power plug: https://www.aliexpress.us/item/3256805325059845.html

Aliexpress Shopping cart:

Photos of PID bought in marketplace:

Cheap 20mm Coil: https://www.aliexpress.us/item/3256806203828482.html


Check out my new forum for discussion:


Back to blog

Leave a comment

Please note, comments need to be approved before they are published.