ElectronBot Elite Edition

V20240707-203746.mp4

V20240514-134129.mp4

PDF_STM32G431 Development Board Built-in STLINK.zip

Altium_STM32G431 development board with built-in STLINK.zip

PADS_STM32G431 development board with built-in STLINK.zip

BOM_STM32G431 development board has built-in STLINK.xlsx

93914

IAP15F2K61S2 LQFP44 to DIP40

I'm self-studying 51 microcontrollers and using the STC IAP15F2K61S2 emulator. It has a DIP40 package, but its pinout differs from the traditional 8051 microcontroller, making it unsuitable for traditional development boards. So I designed my own LQFP44 to DIP40 adapter board (which has already been fabricated).

IAP15F2K61S2 LQFP44 to DIP40 Adapter Board
Version Notes - 2024.7.7
1. Added external crystal oscillator selection pins P1.6 and P1.7.
2. Added external reset selection pin P54.
3. DIP40 pins 29, 30, and 31 are left floating; jumpers can be soldered later if needed.
4. The pin definitions are the same for STC15F/STC15W series LQFP44 packages and should also be applicable.
5. V1 is my first board design with absolutely no prior experience; it features automatic routing, no copper plating, and is already fabricated.
6. V2 is a modified version of V1, optimized after watching EDA video tutorials; DRC checked and found no errors; no copper plating; not yet fabricated.
7. I only have a junior high school education, and my work has nothing to do with electronics; I designed this out of hobby in my spare time, hoping it will be helpful to others. Please correct any shortcomings yourself.
Version V1 is already fabricated, tested and downloadable; all I/O LEDs are working.
Detecting target microcontroller...
Microcontroller model: IAP15F2K61S2
Software protocol: 7.2.5S
Current chip hardware options are:
. After the next cold boot, the system clock source is the internal IRC oscillator
. Current oscillator frequency: 22.078MHz
. . Oscillator amplification gain enabled
. . Power-down wake-up timer frequency: 34.525KHz
. . P3.2 and P3.3 are irrelevant to the next download
. . No additional reset delay is added during power-on reset
. . The reset pin remains the reset pin
. . Reset upon low voltage detection
. . Low voltage detection threshold voltage: 3.82V
. . EEPROM operations cannot be performed under low voltage
. . The internal watchdog timer is not activated during power-on reset. .
The prescaler for automatically activating the internal watchdog timer upon power-on is: 256.
. The watchdog timer stops counting in idle state
. . After the watchdog timer is activated, the software can modify the prescaler, but cannot disable the watchdog timer
. The user EEPROM area will not be erased during the next user program download
. There is no related 485 port control during the next user program download
. The download password does not need to be verified during the next download
. TXD and RXD are independent I/O pins
. After chip reset, the TXD pin is a weak pull-up bidirectional port
. After chip reset, P2.0 outputs a low level
. Internal reference voltage: 1239 mV (reference range: 1150~1320mV).
Microcontroller model: IAP15F2K61S2.
Software protocol: 7.2.5S.

1720367037393.jpg

VID_20240707_233841_20247723477.mp4

Test program.PNG

PDF_IAP15F2K61S2 LQFP44 to DIP40.zip

Altium_IAP15F2K61S2 LQFP44 to DIP40.zip

PADS_IAP15F2K61S2 LQFP44 to DIP40.zip

BOM_IAP15F2K61S2 LQFP44 to DIP40.xlsx

93915

TPS7A49-LDO module

TPS7A49, low noise, high PSRR, adjustable low dropout voltage regulator

Chip Description: TPS7A49 The
TPS7A49 is a 150mA, 36V, low-noise, high PSRR, adjustable low-dropout regulator with enable function.
Electrical Characteristics:

Input Voltage: 3V~36V
; Continuous Output Current: 150mA;
Output Voltage: 1.194V~33V.

Circuit Description:

A 5.082P connector is used as the main input and output interface of the module. A 2.543P header connector is added for extended power input and output for ease of use.
Following the capacitor distribution in the datasheet, 10uF capacitors are used for input and output filtering in conjunction with 100nF capacitors. Note that it is recommended to add a 10nF capacitor to the feedback resistor section to minimize noise and maximize AC performance.
The output voltage can be adjusted by changing the voltage divider resistors R1 and R2; 1% or even 0.1% is recommended.

Note

that the TPS7A49 is often used in conjunction with the TPS7A30 to form a DC-DC converter; pay attention to the positive and negative voltages, as the 7A49 operates on a positive voltage.
When selecting voltage divider resistors, an accuracy of no less than 1% is not recommended, and the feedback line needs careful consideration; it should not be too far from the pins, and a 10nF capacitor should be placed nearby.
PCB layout should ideally follow the datasheet, with the input, output, and chip GND on a single copper trace.
The capacitor voltage rating must be correctly selected. Although this chip supports 36V input, it should not be used for large voltage drop step-down applications, otherwise the temperature will still be very high.

[Actual test image]