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$25 USD / hour
Flag of EGYPT
portsaid, egypt
$25 USD / hour
It's currently 3:17 AM here
Joined July 11, 2015
0 Recommendations

Hossam W.

@HossamWeheesh

 4.9 (11 reviews)
4.5
4.5
83%
83%
$25 USD / hour
Flag of EGYPT
portsaid, egypt
$25 USD / hour
92%
Jobs Completed
97%
On Budget
97%
On Time
7%
Repeat Hire Rate

Electronic Design, PCB layout, MCU firmware

I have 2+ years of experience in Electronic Design, PCB layout, Microcontroller Programming, Automotive electronic applications and 3+ years in Electronics generally with wide knowledge in various areas concerning electronic solutions in electrical and mechanical systems. I can work for long periods on long-term projects especially motivative projects with admirable ideas. I have nice research skills to deal with design challenges, I'm a sort of a limit-pusher when it comes to technical issues. ⦁ My EDAs (KiCAD, Eagle, Proteus, and Fritzing ) Expertise: ⦁ PCB Layout Design ⦁ Microcontrollers (AVR, Arduino, ..) ⦁ Switching Power Drive Applications ⦁ Serial Communication Protocols (UART, SPI, I2C, and CAN) ⦁ Closed-loop control ⦁ PID control ⦁ Algorithm Design ⦁ AC-AC, DC-DC, and AC-DC Conversion ⦁ Arduino prototyping ⦁ Position Sensors in(Automotive Pedals, Tanks, ..etc) ⦁ Liquid Crystal Displays (LCD)
Freelancer Electrical Engineers Egypt
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Portfolio

4233483
My client wanted to produce 100+ devices of a fast charger that is capable of recharging Li-ion, Ni-MH, and Ni-Cd batteries by detecting type (AKA chemistry) and proceeding with fast charging algorithm of the type detected. I've designed Schematic, Power modulation, PCB, and microcontroller code (AVR ATtiny), also I've handled power dissipation calculations and solutions concerning the project at the end
Tri-Chemistry Fast Charger
My client wanted to produce 100+ devices of a fast charger that is capable of recharging Li-ion, Ni-MH, and Ni-Cd batteries by detecting type (AKA chemistry) and proceeding with fast charging algorithm of the type detected. I've designed Schematic, Power modulation, PCB, and microcontroller code (AVR ATtiny), also I've handled power dissipation calculations and solutions concerning the project at the end
Tri-Chemistry Fast Charger
4094043
A device based on Hall sensor signal for a cycle time measuring. The time interval is calculated by the microcontroller using 32.768 KHz watch crystal as timer clock source. The microcontroller then calculates the average of the last n cycles and displays it on a customized segment LCD. The system is powered up with Li-Po battery of 3.7 v and a 0.05-watt solar cell as a recharging source, in addition to that, A micro USB port is used for wired charging in case of low battery
Solar powered Bike Speedometer
A device based on Hall sensor signal for a cycle time measuring. The time interval is calculated by the microcontroller using 32.768 KHz watch crystal as timer clock source. The microcontroller then calculates the average of the last n cycles and displays it on a customized segment LCD. The system is powered up with Li-Po battery of 3.7 v and a 0.05-watt solar cell as a recharging source, in addition to that, A micro USB port is used for wired charging in case of low battery
Solar powered Bike Speedometer
4093684
This board is designed to measure 12v and 24v batteries' voltages using AVR built-in ADC. The value then is displayed on a 4-digit 7-Segment display. the 4 digits are multiplexed using ATMEGA8A microcontroller, The value is rounded to the nearest hundredth by the Microcontroller to match the 4-digit display. The last image, which is a different board, shows an example of power and ground terminals connection.
Car Battery Voltmeter Using Lighter Socket
This board is designed to measure 12v and 24v batteries' voltages using AVR built-in ADC. The value then is displayed on a 4-digit 7-Segment display. the 4 digits are multiplexed using ATMEGA8A microcontroller, The value is rounded to the nearest hundredth by the Microcontroller to match the 4-digit display. The last image, which is a different board, shows an example of power and ground terminals connection.
Car Battery Voltmeter Using Lighter Socket
This board is designed to measure 12v and 24v batteries' voltages using AVR built-in ADC. The value then is displayed on a 4-digit 7-Segment display. the 4 digits are multiplexed using ATMEGA8A microcontroller, The value is rounded to the nearest hundredth by the Microcontroller to match the 4-digit display. The last image, which is a different board, shows an example of power and ground terminals connection.
Car Battery Voltmeter Using Lighter Socket
This board is designed to measure 12v and 24v batteries' voltages using AVR built-in ADC. The value then is displayed on a 4-digit 7-Segment display. the 4 digits are multiplexed using ATMEGA8A microcontroller, The value is rounded to the nearest hundredth by the Microcontroller to match the 4-digit display. The last image, which is a different board, shows an example of power and ground terminals connection.
Car Battery Voltmeter Using Lighter Socket
4093137
I designed this circuit to control low power four induction motors with an IR remote control. The board has an IR phototransistor for detection connected to ATMEL AVR microcontroller to do the decoding, Signal the Triacs, Control the 2-digit 7-segment display module, and check for the zero-cross using the H11A1 module for high voltage isolation.
High voltage Induction motors speed control board
I designed this circuit to control low power four induction motors with an IR remote control. The board has an IR phototransistor for detection connected to ATMEL AVR microcontroller to do the decoding, Signal the Triacs, Control the 2-digit 7-segment display module, and check for the zero-cross using the H11A1 module for high voltage isolation.
High voltage Induction motors speed control board
I designed this circuit to control low power four induction motors with an IR remote control. The board has an IR phototransistor for detection connected to ATMEL AVR microcontroller to do the decoding, Signal the Triacs, Control the 2-digit 7-segment display module, and check for the zero-cross using the H11A1 module for high voltage isolation.
High voltage Induction motors speed control board
I designed this circuit to control low power four induction motors with an IR remote control. The board has an IR phototransistor for detection connected to ATMEL AVR microcontroller to do the decoding, Signal the Triacs, Control the 2-digit 7-segment display module, and check for the zero-cross using the H11A1 module for high voltage isolation.
High voltage Induction motors speed control board
4233483
My client wanted to produce 100+ devices of a fast charger that is capable of recharging Li-ion, Ni-MH, and Ni-Cd batteries by detecting type (AKA chemistry) and proceeding with fast charging algorithm of the type detected. I've designed Schematic, Power modulation, PCB, and microcontroller code (AVR ATtiny), also I've handled power dissipation calculations and solutions concerning the project at the end
Tri-Chemistry Fast Charger
My client wanted to produce 100+ devices of a fast charger that is capable of recharging Li-ion, Ni-MH, and Ni-Cd batteries by detecting type (AKA chemistry) and proceeding with fast charging algorithm of the type detected. I've designed Schematic, Power modulation, PCB, and microcontroller code (AVR ATtiny), also I've handled power dissipation calculations and solutions concerning the project at the end
Tri-Chemistry Fast Charger
4094043
A device based on Hall sensor signal for a cycle time measuring. The time interval is calculated by the microcontroller using 32.768 KHz watch crystal as timer clock source. The microcontroller then calculates the average of the last n cycles and displays it on a customized segment LCD. The system is powered up with Li-Po battery of 3.7 v and a 0.05-watt solar cell as a recharging source, in addition to that, A micro USB port is used for wired charging in case of low battery
Solar powered Bike Speedometer
A device based on Hall sensor signal for a cycle time measuring. The time interval is calculated by the microcontroller using 32.768 KHz watch crystal as timer clock source. The microcontroller then calculates the average of the last n cycles and displays it on a customized segment LCD. The system is powered up with Li-Po battery of 3.7 v and a 0.05-watt solar cell as a recharging source, in addition to that, A micro USB port is used for wired charging in case of low battery
Solar powered Bike Speedometer
4093684
This board is designed to measure 12v and 24v batteries' voltages using AVR built-in ADC. The value then is displayed on a 4-digit 7-Segment display. the 4 digits are multiplexed using ATMEGA8A microcontroller, The value is rounded to the nearest hundredth by the Microcontroller to match the 4-digit display. The last image, which is a different board, shows an example of power and ground terminals connection.
Car Battery Voltmeter Using Lighter Socket
This board is designed to measure 12v and 24v batteries' voltages using AVR built-in ADC. The value then is displayed on a 4-digit 7-Segment display. the 4 digits are multiplexed using ATMEGA8A microcontroller, The value is rounded to the nearest hundredth by the Microcontroller to match the 4-digit display. The last image, which is a different board, shows an example of power and ground terminals connection.
Car Battery Voltmeter Using Lighter Socket
This board is designed to measure 12v and 24v batteries' voltages using AVR built-in ADC. The value then is displayed on a 4-digit 7-Segment display. the 4 digits are multiplexed using ATMEGA8A microcontroller, The value is rounded to the nearest hundredth by the Microcontroller to match the 4-digit display. The last image, which is a different board, shows an example of power and ground terminals connection.
Car Battery Voltmeter Using Lighter Socket
This board is designed to measure 12v and 24v batteries' voltages using AVR built-in ADC. The value then is displayed on a 4-digit 7-Segment display. the 4 digits are multiplexed using ATMEGA8A microcontroller, The value is rounded to the nearest hundredth by the Microcontroller to match the 4-digit display. The last image, which is a different board, shows an example of power and ground terminals connection.
Car Battery Voltmeter Using Lighter Socket
4093137
I designed this circuit to control low power four induction motors with an IR remote control. The board has an IR phototransistor for detection connected to ATMEL AVR microcontroller to do the decoding, Signal the Triacs, Control the 2-digit 7-segment display module, and check for the zero-cross using the H11A1 module for high voltage isolation.
High voltage Induction motors speed control board
I designed this circuit to control low power four induction motors with an IR remote control. The board has an IR phototransistor for detection connected to ATMEL AVR microcontroller to do the decoding, Signal the Triacs, Control the 2-digit 7-segment display module, and check for the zero-cross using the H11A1 module for high voltage isolation.
High voltage Induction motors speed control board
I designed this circuit to control low power four induction motors with an IR remote control. The board has an IR phototransistor for detection connected to ATMEL AVR microcontroller to do the decoding, Signal the Triacs, Control the 2-digit 7-segment display module, and check for the zero-cross using the H11A1 module for high voltage isolation.
High voltage Induction motors speed control board
I designed this circuit to control low power four induction motors with an IR remote control. The board has an IR phototransistor for detection connected to ATMEL AVR microcontroller to do the decoding, Signal the Triacs, Control the 2-digit 7-segment display module, and check for the zero-cross using the H11A1 module for high voltage isolation.
High voltage Induction motors speed control board

Reviews

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Showing 1 - 5 out of 11 reviews
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5.0
$145.00 CAD
PCB board design and prototyping
A+++ great work excellent knowledge in PCB printing and gerber files
Electronics
Microcontroller
Electrical Engineering
PCB Layout
Altium Designer
Z
Flag of Zein M.
@zmassri
•
1 year ago
1.4
$50.00 USD
PID for Dehumidifier Control
He disappeared and stopped responding
Electronics
Microcontroller
PCB Layout
Product Design
Internet of Things (IoT)
User Avatar
Flag of Maged L.
@MagedLouis
•
4 years ago
5.0
$100.00 USD
Project for Hossam W.
Hossam is highly recommended, great services with knowledge on the subject. Creative mind and solution problem solver. I will always be rehiring Hossam with my future projects. Excellent communication and on time! Thank you once again Hossam for your assistance and services. A+++++ FREELANCER
Microcontroller
Embedded Software
PCB Layout
Arduino
+1 more
User Avatar
Flag of Nick A.
@elumalite
•
4 years ago
5.0
$50.00 USD
Force sensor info, set up and parts needed.
Hossam is a highly skilled electrical engineer. Iam very happy with his work i got everything a neede and more. He has excellent english that helpes communication.
Engineering
Electrical Engineering
E
Flag of Emilio A.
@emiliox
•
5 years ago
5.0
$110.00 USD
Project for Hossam W.
I really appreciate his hard work and finished in a short period of time. Thank you for your help.
Microcontroller
Electrical Engineering
PCB Layout
Arduino
+1 more
T
Flag of Thushyanthan V.
@thugeo15
•
5 years ago

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Top Skills

Electrical Engineering 8
PCB Layout 6
Arduino 6
Circuit Design 6
Electronics 5

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