
Analog terminal bell
tenderlove/analog-terminal-bell
A bell for your terminal that is analog

This repository contains ESP32 sketches and Node-RED flows from the course "NodeRed ESP32 Make a Terrarium Controller".
Red node with ESP32 is an open-source printed circuit board by futureshocked, from the futureshocked/NodeRed-ESP32-TerrariumController repository on GitHub, published under the MIT licence. It is a 2-layer board of 57.4 × 53.8 mm with 25 parts on 45 nets, routed with 215 tracks and 1 via.
It is built around the TIP122. Its parts include 9 resistors, 6 connectors, 4 diodes, 1 capacitor and 1 IC. It belongs with the ESP32 boards of this library.
https://app.techexplorations.com/courses/node-red-esp32-make-a-terrarium-controller/
This repository contains ESP32 sketches and Node-RED flows from the course "NodeRed ESP32 Make a Terrarium Controller".
The flows have been tested with Node-RED 5.0.8 on Node.js 22 and 26. They work unchanged, but the Node-RED editor and install process look different from the videos. Read UPDATE-2026.md before you start.
| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | 330 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R1, R6, R8, R9 |
| 3 | LED | LED_THT:LED_D5.0mm | D1, D3, D4 |
| 1 | 100uF | Capacitor_THT:CP_Radial_D8.0mm_P3.80mm | C1 |
| 1 | 200K | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R3 |
| 1 | 20K | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R7 |
| 1 | 220K | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R4 |
| 1 | 300K | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R2 |
| 1 | 420K | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R5 |
| 1 | BMP/BME 280 | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J2 |
| 1 | Barrel_Jack_Switch | Connector_BarrelJack:BarrelJack_Horizontal | J6 |
| 1 | DHT22 terminal | TerminalBlock:TerminalBlock_bornier-3_P5.08mm | J5 |
| 1 | D_Schottky | Diode_THT:D_DO-41_SOD81_P7.62mm_Horizontal | D2 |
| 1 | ESP32-DEVKITC-32D | Custom_project_footprints:MODULE_ESP32-DEVKITC_PD | U1 |
| 1 | MCU_MOTOR_POWER | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | JP1 |
| 1 | Moisture Sensor | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J1 |
| 1 | Motor | TerminalBlock:TerminalBlock_bornier-2_P5.08mm | J4 |
| 1 | Motor Battery | TerminalBlock:TerminalBlock_bornier-2_P5.08mm | J3 |
| 1 | TIP122 | Package_TO_SOT_THT:TO-220-3_Vertical | Q1 |
| 1 | VCC Jumper | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | JP2 |
| 1 | VCC2 Jumper | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | JP3 |

tenderlove/analog-terminal-bell
A bell for your terminal that is analog

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Aniket95-code/Fan-Speed-Controller-NE555-PCB-design
A simple, low-cost DC fan speed controller built around the classic NE555 timer IC operating in astable mode. Fan speed is adjusted by varying the PWM duty cycle via a potentiometer, while a TIP122 Darlington transistor…

It measures 57.4 × 53.8 mm and has 2 copper layers, 1.6 mm thick.
25 parts, built around the TIP122. 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 futureshocked/NodeRed-ESP32-TerrariumController repository on GitHub, at the commit this page was made from: the board is KiCad Terrarium Controller project/Red-node with ESP32.kicad_pcb and its schematic KiCad Terrarium Controller project/Red-node with ESP32.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).