Peter's electronic projects Peter's electronic projects
Try it now, before building! Click on the transmitter buttons with the
green
labels
on the left and see how the receiver outputs (K1-K8) change. Change
the number of transmitter or receiver channels. Switch the receiver
output type between latched and momentary.
| part | description |
| C1 |
100nF ceramic capacitor |
| R1 |
10k resistor (1/8W) |
| D1-D4 | 1N4148 diode (optional) |
| S1-S8 |
tact switch, DTSM 61N or similar |
| IC1 | PIC16F630 or PIC16F676 microcontroller, pre-programmed |
| TXMOD |
radio
transmitter module, see text (hardware) |
| B1 |
battery between 2-5.5VDC (check TXMOD specs for valid voltage range) |
| part | description |
| C1 |
100nF ceramic capacitor |
| C2 |
470 uF 6.3V, electrolytic
capacitor |
| R1 |
10k resistor (1/8W) |
| R2 |
10 ohm resistor (1/4W) |
| D1-D4 | 1N4148 diode (optional) |
| D5 |
IR transmitter LED |
| Q1 |
BSS138 or similar N-MOSFET |
| S1-S8 |
tact switch, DTSM 61N or similar |
| IC1 | PIC16F684 microcontroller, pre-programmed |
| B1 |
battery between 2-5.5VDC (CR2032, 3.6V LiIon battery or 3xAA
batteries) |
| please
observe the corresponding address configuration! |
|
 transmitter: no diodes connected |
 receiver: switches all ON |
 transmitter: all diodes connected |
 receiver: switches all OFF |
parts list
| part | description |
| C1, C2 | 22pF ceramic capacitor |
| C3, C5 | 100nF ceramic capacitor |
| C6 | 10uF 6.3V electrolytic capacitor |
| CN1-CN8 | PCB terminal block, 3-way (DG301) |
| D1-D8 | 1N4004 diode |
| IC1 | PIC16F627 or PIC16F628 or PIC16F627A or PIC16F628A microcontroller, pre-programmed |
| IC2 | LP2950CZ5.0 voltage regulator |
| LED | 3mm LED (green) |
| LED1-LED8 | 3mm LED (red) |
| Q1-Q8 | BS170 N-channel mosfet transistor |
| R1-R9 | 220R resistor (1/8W) |
| RL1-RL8 | G5LE relay, see text for coil voltage selection |
| S1 | piano DIP switch, 4-way |
| X1 | 4MHz HC49 crystal |
| RXMOD | 3-pin radio receiver module, see text (hardware) |
| please
observe the corresponding address configuration! |
|
| transmitter: no diodes connected |
receiver: switches all ON |
| transmitter: all diodes connected |
receiver: switches all OFF |
The Firmware TCL 30 XL 4G is the digital brain of your phone. Keeping it updated ensures security patches, bug fixes, and smooth performance. However, manual flashing carries risks: a wrong scatter file can permanently brick the eMMC.
Final Pro Tips:
By following this guide, you can rescue a dead TCL 30 XL 4G, upgrade to the latest Android build, or simply breathe new life into an old device. Remember to verify your model number (T610K vs T671O) and always download firmware from trusted sources.
Do you have a specific error code on your TCL 30 XL 4G? Leave a comment below (on the original blog) and the community will help you troubleshoot.
Understanding the Firmware of Your TCL 30 XL 4G The TCL 30 XL 4G (released in June 2022) is an affordable, large-screen smartphone designed to run efficiently on Android 12 paired with TCL UI 3.0. Keeping your firmware updated is vital for maintaining device security, performance, and compatibility with the latest apps. How to Update Your TCL 30 XL 4G Firmware
Most users will receive updates wirelessly through Firmware-Over-The-Air (FOTA). You can manually check for these updates at any time: Open the Settings app on your phone. Scroll down and select System. Tap on System Update. Firmware TCL 30 XL 4G
Tap Check for Updates. If a new version is found, follow the on-screen prompts to download and install it.
Restart your device to finish the installation once the download is complete. Advanced Firmware Management
If your device is unresponsive or needs a complete software reinstallation, TCL provides official tools for manual flashing:
Mobile Upgrade Tool: This is the official PC-based utility for reviving or upgrading TCL mobile devices. You can download it directly from the TCL Support site.
Stock ROMs: For technical users looking for specific firmware files (Flash Files), databases like HardReset.info often gather official stock firmware for various models. Key Device Specifications The Firmware TCL 30 XL 4G is the
The firmware is specifically optimized for the following hardware configuration: Operating System: Android 12 with TCL UI 3.0. Processor: MediaTek Helio A25 (Octa-core). Memory: 6 GB RAM. Storage: 64 GB internal (expandable via microSDXC). Battery: 5000 mAh with 18W fast charging support. Important Safety Tips
Backup Your Data: Always back up your personal files to Google Drive or a PC before performing any major firmware update to prevent data loss.
Battery Level: Ensure your phone has at least 50% battery or is connected to a charger before starting an update.
Stable Connection: Use a stable Wi-Fi network rather than mobile data to avoid corruption during the download process.
The TCL 30 XL 4G has a locked bootloader by default. With a locked bootloader, fastboot only allows: By following this guide, you can rescue a
Commands like fastboot flash boot boot.img are rejected unless the bootloader is unlocked (rarely possible on TCL devices). This prevents casual flashing but also protects against accidental corruption.
A common post-flash issue on TCL MediaTek phones is losing the IMEI number (the unique identifier for your 4G network). To fix this:
For developers, the Firmware TCL 30 XL 4G can be modified. Unlocking the bootloader wipes your data but allows custom recoveries (TWRP) and root (Magisk).
To unlock:
Warning: Custom firmware for the TCL 30 XL 4G is rare. Most users should stick to stock firmware to avoid losing VoLTE, Wi-Fi calling, and camera stability.
LATCH_MASK EQU B'00001111' sets channels 8-5 to momentary
and
channels 4-1 to latched (toggle) mode. Then use the compiler (MPLAB or
gputils) to
assemble the code.clrf
0x91 ;
ANSEL