Eduino Eduardo

Eduino Eduardo is an improved DIY Arduino UNO R3 compatible development board. I have designed it to teach children soldering, electronics and programming.

If you want to know more about my work: There is an arcticle from our local newspaper

Features

USB B connector

Power supply socket, 6-12 V input voltage

Switching of the supply voltage via two Texas Instruments power-distribution switches (TPS2041 / TPS2051)

Current limitation for both supply voltages (USB / VIn)

Overcurrent indicator via two red LEDs

PIC 16F1455 as USB microcontroller with official sublicense of USB VID/PID (0x04D8/0xF015) from Microchip

Reverse polarity protection up to 30V for VIn

Compatible with Arduino Uno R3

Supplies

Step 1: Solder U2: TPS 2041B

Check orientation!

The gray line on the IC has to be positioned upwards, at the little white circle inside of the red enclosed area.

Step 2: Solder U7: TPS2051B

Check orientation!

The gray line on the IC has to be positioned upwards, at the little white circle inside of the red enclosed area.

Step 3: Solder U1: AMS 1117 5.0

Step 4: Solder U6: AMS 1117 3.3

Step 5: Solder R1, R3, R8: Resistor 10 KOhm

Color code:brown, black, black, brown, brown

Step 6: Solder R2, R4, R5, R6, R7, R9, R10, R11: Resistor 1 KOhm

Color code: brown, black, black, red, brown

Step 7: Solder U5: IC Socket 28 Pins

Check orientation!

The notch on the socket has to match the notch as stenciled on the board.

Step 8: Solder U4: IC Socket 14 Pins

Check orientation!

The notch on the socket has to match the notch as stenciled on the board.

Step 9: Solder Power: Female Header 8 Pin

Step 10: Solder Analog In: Female Header 6 Pin

Step 11: Solder Digital: Female Header 8 Pin

Step 12: Solder : Female Header 10 Pin

Step 13: Solder C1, C3, C5, C7, C8, C10, C11, C12: Capacitor 100 NF

Step 14: Solder LED4 and LED5: LED 3mm Red

Check polarity !

The long leg has to be positioned on the left side (+ sign on the board )

Step 15: Solder LED1 and LED2: LED 3mm Yellow

Check polarity !

The long leg has to be positioned on the left side (+ sign on the board )

Step 16: Solder LED3: LED 3mm Green

Check polarity !

The long leg has to be positioned on the left side (+ sign on the board )

Step 17: Solder D3: Diode 1N4148

Check polarity !

The black marking has to be positioned on the left side

Step 18: Solder D2: Diode 1N5819

Check polarity !

The gray marking has to be positioned upwards.

Step 19: Solder D1: Z-Diode ZPD 5.1

Check polarity !

The black marking has to be positioned on the left side

Step 20: Solder C4 and C6: Electrolytic Capacitor 47 UF

Check polarity !

The long leg has to be positioned downwards (+sign on the board)

Step 21: Solder C2 and C9: Electrolytic Capacitor 10 UF

Check polarity !

The long leg has to be positioned on the left side at C2 (+sign on the board) and downwards at C9 (+sign on the board)

Step 22: Solder L1, L2: Ferrite Bead

Step 23: Solder: Resonator 16Mhz

Step 24: Solder ICSP: Header Male 2x3

Step 25: Solder X1: DC Power Jack

Step 26: Solder X2: USB Type B Connector

Step 27: Short Circuit Check

Check the bottom side for possible soldering short circuits

Step 28: Power Supply Check

Connect the board with a PC or a USB charger via a USB-B cable.

The green LED should light up now.

Step 29: Short Circuit Test

Connect GND and +5V with a jumper wire cable

Then connect the board with a PC or a USB charger via a USB-B cable. The red LED on top should light up now (Overcurrent indicator)

Step 30: Mount PIC 16F1455

Check orientation !

The IC has to be mounted carefully, with the notch in the IC matching the notch in the socket.

Step 31: Mount ATMEGA328P-PU

Check orientation !

The IC has to be mounted carefully, with the notch in the IC matching the notch in the socket.

Step 32: Boards Availability

If anyone would like a board, it is already shared on PCBWay:

https://www.pcbway.com/project/shareproject/Eduino_Eduardo.html