DroidReflow - PID based reflow oven controller that can be controlled with the rotary encoder and display or via Bluetooth using Android Smartphone or Tablet. Unlike many other designs available this controller is using a triac to switch AC mains supply on and off. Once a triac is activated (latched) it will stay latched on until the AC sine wave crosses zero again. The benefit of this design is that you don't need to modify your oven and the controller can be installed as an external unit outside of the oven.

K type thermocouple should be connected to MAX31855K ADC which linked to the processor using SPI protocol.

DroidReflow can be controlled from Smartphone or Tablet via Bluetooth or alternatively by using rotary encoder and a Nokia 5110 LCD.

I use DroidReflow with halogen oven like this one:

Halogen oven on ebay

I have ordered one form eBay for £20.

Why choose halogen? Lots reasons put together really. Toaster ovens aren’t as common in the UK as they are in the USA, halogen ovens are very common and low cost. Halogen ovens heat up faster than toaster ovens and that’s important for the ramp-up stage of the reflow profile. Halogen ovens have amazing visibility. Not only is the whole thing glass but there’s that extremely bright halogen lamp as well. This controller will also work with conventional Toaster oven. You should choose your oven so it does not draw more the 8 amps max. I have chosen 1400 W oven for my work.

Here is an example of the board I have made using DroidReflow

"example board")

The Android app and the firmware on the board have preprogrammed profiles to reflow Leaded and Lead free solder.

Link to the Google Playstore

Features

• 220-240V 50 Hz mains frequency, 8 Amps load

• Option to control oven using rotary encoder

• J-STD-020D.1 Leaded and Lead Free profiles

Please note that the base controller model is supplied without thermocouple, LCD and rotary encoder. This model could only be used 220 -240 V and 50 Hz mains supply only