A modular PCB soldering hot plate using only through hole components
A modular PCB hot plate designed for hot plate soldering. It is designed for SMD soldering and can go up to 180°C. Made using only through hole components in order to make it easy to build by hobbyists.
- 180°C max temperature
- Microcontroller: Atmel ATTINY84A
- Display: 128x64 pixel SSD1306 or compatible display
- Modular/interchangeable hot plates
- 18-20 volt 2x5.5mm DC input
- 3 button input
Best used with low melt solder paste. This includes:
- Sn48/In52
- Sn42/Bi58
- Sn42/Bi57/Ag1.0
Please refer to Building Instructions page for detailed instructions.
| Pin | Description |
|---|---|
| 1 | +18-20V power |
| 2 | Ground |
| 3 | Ground |
| Pin | Description |
|---|---|
| 1 | MISO |
| 2 | +5V |
| 3 | SCL |
| 4 | MOSI |
| 5 | Reset |
| 6 | Ground |
| Pin | Description |
|---|---|
| 1 | NC |
| 2 | +18-20V |
| 3 | +18-20V |
| 4 | MOSFET drain |
| 5 | MOSFET drain |
| 6 | +5V |
| 7 | Ground |
| 8 | Temp. sensor output |
Note: The J3 connector on the control board is exactly the same as the J1 connector on the hot plate board
A list of all Digikey parts can be found here
| Type | Reference | Description | Quantity | Source |
|---|---|---|---|---|
| Integrated Circuit | U1 | L7805CV voltage regulator | 1 | Digikey 497-1443-5-ND |
| Integrated Circuit | U2 | ATTINY84A-PU microcontroller | 1 | Digikey ATTINY84A-PU-ND |
| Display | U3 | SSD1306 128x64 0.96" display | 1 | Ebay, AliExpress, and other sources |
| IC Socket | U2 | DIP-14 300 mil socket | 1 | Digikey ED3014-ND |
| Diode | D1, D2 | SD103A | 2 | Digikey SD103AVSCT-ND |
| Diode | D3 | 1N5231 | 1 | Digikey 1N5231B-ND |
| MOSFET | Q1 | IRLZ44N | 1 | Digikey IRLZ44NPBF-ND |
| Capacitor | C1 | 100uF, Electrolytic, 3.5mm lead spacing | 1 | Digikey 732-9187-1-ND |
| Capacitor | C2-C4, C8 | 0.1uF, MLCC, 5mm lead spacing | 4 | Digikey BC2665CT-ND |
| Capacitor | C5-C7 | 3300pF, MLCC, 2.5mm lead spacing | 3 | Digikey BC1075CT-ND |
| Resistor | R1-R5, R7 | 10kOhm, through hole | 6 | Digikey 13-MFR-25FRF52-10KCT-ND |
| Resistor | R6 | 30kOhm, through hole | 1 | Digikey 13-MFR-25FTE52-30KCT-ND |
| Resistor | R8 | 200Ohm, throught hole | 1 | Digikey 200XBK-ND |
| Tactile Button | SW1-SW3 | 6mm tactile button | 3 | Digikey 450-1654-ND |
| DC Jack | J1 | 2x5.5mm, through hole, right angle | 1 | Digikey CP-002AH-ND |
| Pin Header | J2 | 6 pin header, 2.54mm pitch, 2x3 pins | 1 | Digikey 732-5394-ND |
| Pin Header | J3 | 8 pin header, 2.54mm pitch, right angle | 1 | Digikey 2057-PH1RB-08-UA-ND |
| Type | Reference | Description | Quantity | Source |
|---|---|---|---|---|
| Integrated Circuit | U1 | LMT87LPGM temperature sensor | 1 | Digikey 296-LMT87LPGMCT-ND |
| Capacitor | C1, C2 | 0.1uF, MLCC, 5mm lead spacing | 2 | Digikey BC2665CT-ND |
| Pin Socket | J1 | 8 pin header, 2.54mm pitch, right angle | 1 | Digikey S5483-ND |
Source code is licensed under the GPLV3 or later.
Everything else is licensed under the CERN-OHL-W-2.0.