
Analog and ad9958
balmerdx/BalmerDX_VNA
Vector Network Analyzer 10 KHz - 180 MHz

This project is a BBQ temperature sensor that allows you to monitor the temperature of your BBQ grill or smoker remotely.
Bbq sensor is an open-source printed circuit board by oliverhihn, from the oliverhihn/bbq_sensor repository on GitHub. It is a 2-layer board of 79 × 79 mm with 12 parts on 22 nets, routed with 85 tracks and 5 vias.
It is built around the WEMOS D1 MINI and HT7333. Its parts include 6 capacitors and 1 IC. It belongs with the sensors and measurement boards and the ESP8266 boards of this library.
This project is a BBQ temperature sensor that allows you to monitor the temperature of your BBQ grill or smoker remotely. It uses a Thermocouple with a MAX31855 amplifier temperature sensor to measure the temperature and an ESP8266 (D1 Mini) microcontroller to send the data to a web server. The project is designed to be easy to set up and use.
For a more stable and compact design, a custom PCB was created. The PCB is designed to hold the D1 Mini microcontroller and the MAX31855 amplifier.
image:

The project uses ESPHome to manage the D1 Mini microcontroller. ESPHome is a system that allows you to control your ESP8266/ESP32 devices through simple yet powerful configuration files and control them remotely through Home Assistant.
esp8266:
board: d1_mini
spi:
miso_pin: D0
clk_pin: D1
sensor:
- platform: max31855
name: "BBQ Temperature"
cs_pin: D2
update_interval: 10sThank you to @pbtec_14016 for the original design of the box. The original design was modified to fit the PCB and the D1 Mini microcontroller. The box is designed to be 3D printed and has cutouts for the thermocouple and the D1 Mini microcontroller.

Only things changed from the original design are the Holes in the wall of the box for the cables, the count of screws for the lid, and the dimensions. The box is designed to be printed in one piece, with no need for supports. The design is parametric, allowing you to easily adjust the dimensions to fit your needs.
| Qty | Value | Footprint | References |
|---|---|---|---|
| 2 | 0.1 µF MLCC | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C4, C6 |
| 2 | 47 µF MLCC | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C1, C5 |
| 1 | 100 µF Elco | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C2 |
| 1 | 10 µF MLCC | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C3 |
| 1 | Battery_Conn | Connector_JST:JST_EH_B2B-EH-A_1x02_P2.50mm_Vertical | Battery |
| 1 | Conn_01x06_Socket | Connector_PinSocket_2.54mm:PinSocket_1x06_P2.54mm_Vertical | MAX31855 |
| 1 | HT7333 | Package_TO_SOT_SMD:SOT-89-3_Handsoldering | HT7333 |
| 1 | USB-C_Conn | Connector_JST:JST_EH_B2B-EH-A_1x02_P2.50mm_Vertical | USB-C |
| 1 | WEMOS_D1_mini | RF_Module:WEMOS_D1_mini_light | U2 |
| 1 | ~ | tp4056-module:tp4056-module | TP4056 |

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Vector Network Analyzer 10 KHz - 180 MHz


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It measures 79 × 79 mm and has 2 copper layers, 1.6 mm thick.
12 parts, built around the WEMOS D1 MINI and HT7333. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
From the oliverhihn/bbq_sensor repository on GitHub, at the commit this page was made from: the board is bbq_sensor.kicad_pcb and its schematic bbq_sensor.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Its repository states no licence, so its author keeps all rights: ask oliverhihn before reusing the design.