T-962A Reflow Solder Oven
This solder oven from China is cheap and sturdy. It has a bunch of technical issues that are quite easy to fix, thanks to Unified Engineering, a Swedish organization that has made an alternative firmware available for free.
Step 1: Grounding Wire
Remove the top lid by removing 7 screws in the back and two more under the front lip above the drawer. The drawe can be removed by lifting two plastic latches on the sliders.
Remove the grounding ring, then completely remove the paint that keeps the grounding pin from touching the metal, the reattach the ring. Even better, puchase two ground terminals and connect a second wire to the lid.
Step 2: Replace Masking Tape
Remove all masking tape on the heat protection. Don’t forget to remove the tape in the front under the heat shield. Replace with multiple layers of Kapton tape or other non-conductive heat resitant material.
Step 3: Reflash the Firmware
Get a USB-to-Serial 3.3V adapter and hook it up to the ISP connector inside the oven (deatils will follow). Download the firmware and a software to flash the mikrocontroller.
Step 4: Solder in the Temperature Sensor
- T 962 Inprovements.
- DS18B20 Sensor.
- get DS18B20 sensor
1: GND -----===== 2: DQ -----| | (TO-92, flat side up) 3: VDD -----=====
- GPIO0.7 as data line, next to pad is 3.3V, add 4k7 pulluup
- 3.3V power supply
- Tempsensor Mod
Step 5: System Fan Speed Controlhook up the fan control
- System Fan Control.
- 2N7000 FET
1: source -----===== 2: gate -----| | (TO-92, flat side up) 3: drain -----=====
- AD0 test point to Gate
- GND to Source
- Fan to Drain