telegram-doorman
jctots
ESP8266-based smart doorbell bridge — control and monitor your TCS/Koch intercom via Telegram Bot with multi-user support and event notifications
Components (16)
| Reference | Value | Description |
|---|---|---|
| Q1 | 2N3904 | 0.2A Ic, 40V Vce, Small Signal NPN Transistor, TO-92 |
| U1 | WeMos_D1_mini | 32-bit microcontroller module with WiFi |
| U2 | LM393 | Low-Power, Low-Offset Voltage, Dual Comparators, DIP-8/SOIC-8/TO-99-8 |
| U3,U4 | PC817 | DC Optocoupler, Vce 35V, CTR 50-300%, DIP-4 |
| U5 | TSR_1-2450 | 1A step-down regulator module, fixed 5V output voltage, 5-36V input voltage, -40°C to +85°C temperature range, TO-220 compatible LM78xx replacement |
| C1,C5 | 0.1uF | Unpolarized capacitor |
| C2-C4 | 10uF | Polarized capacitor |
| J1 | Conn_01x03_Pin | Generic connector, single row, 01x03, script generated |
| J2-J4 | Conn_01x02_Pin | Generic connector, single row, 01x02, script generated |
| L1 | 56uH | Inductor with ferrite core |
| R1 | 22k | Resistor |
| R2,R4 |