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Krists P.

@Kristsp

5.0
12

4.4

4.4

100%

Electronics projects designer and programmer

$30 USD / Hour

・

Flag of

Latvia (6:43 AM)

・

Joined on April 25, 2004

$30 USD / Hour

・

Electronics engineering and fun projects using digital and analog components. Microchip PIC, Atmel AVR, Texas Instruments MSP430, STM32, Nordic nRF52 micro controllers. Arduino compatible devices and designs. Circuit schematics, PCB layout and design. Windows and Linux scripting, C and C++ programming tasks.

Verifications

On time

99%

On budget

99%

Accept rate

100%

Freelancer Microcontroller Developers Latvia
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Portfolio

Portfolio

9276211
Schematic and PCB design of ATmega 2560 control board for infrared light gate device. IR light gate uses additional PCBs with OSRAM SFH 4550 leds and Vishay TSSP4056 infrared receivers.

ATmega 2560 IR sensors control board

Schematic and PCB design of ATmega 2560 control board for infrared light gate device. IR light gate uses additional PCBs with OSRAM SFH 4550 leds and Vishay TSSP4056 infrared receivers.

ATmega 2560 IR sensors control board

Schematic and PCB design of ATmega 2560 control board for infrared light gate device. IR light gate uses additional PCBs with OSRAM SFH 4550 leds and Vishay TSSP4056 infrared receivers.

ATmega 2560 IR sensors control board

Schematic and PCB design of ATmega 2560 control board for infrared light gate device. IR light gate uses additional PCBs with OSRAM SFH 4550 leds and Vishay TSSP4056 infrared receivers.

ATmega 2560 IR sensors control board

4376667
Design of battery monitoring device with current sense amplifier and ATmega 328 to monitor battery voltage and current usage. Measurement data can be read from host device using I2C connection that is electrically isolated to prevent voltage level difference during high current spikes.

Battery monitoring board

Design of battery monitoring device with current sense amplifier and ATmega 328 to monitor battery voltage and current usage. Measurement data can be read from host device using I2C connection that is electrically isolated to prevent voltage level difference during high current spikes.

Battery monitoring board

Design of battery monitoring device with current sense amplifier and ATmega 328 to monitor battery voltage and current usage. Measurement data can be read from host device using I2C connection that is electrically isolated to prevent voltage level difference during high current spikes.

Battery monitoring board

Design of battery monitoring device with current sense amplifier and ATmega 328 to monitor battery voltage and current usage. Measurement data can be read from host device using I2C connection that is electrically isolated to prevent voltage level difference during high current spikes.

Battery monitoring board

Design of battery monitoring device with current sense amplifier and ATmega 328 to monitor battery voltage and current usage. Measurement data can be read from host device using I2C connection that is electrically isolated to prevent voltage level difference during high current spikes.

Battery monitoring board

6930916
Design of the enclosure for electronics device that consists of base PCB, several buttons, connectors and LCD screen. Enclosure consists of two parts that are bolted together fitting around electronic parts. 3D model was designed using FreeCAD.

3D design of the enclosure for electronics device

Design of the enclosure for electronics device that consists of base PCB, several buttons, connectors and LCD screen. Enclosure consists of two parts that are bolted together fitting around electronic parts. 3D model was designed using FreeCAD.

3D design of the enclosure for electronics device

Design of the enclosure for electronics device that consists of base PCB, several buttons, connectors and LCD screen. Enclosure consists of two parts that are bolted together fitting around electronic parts. 3D model was designed using FreeCAD.

3D design of the enclosure for electronics device

Design of the enclosure for electronics device that consists of base PCB, several buttons, connectors and LCD screen. Enclosure consists of two parts that are bolted together fitting around electronic parts. 3D model was designed using FreeCAD.

3D design of the enclosure for electronics device

Design of the enclosure for electronics device that consists of base PCB, several buttons, connectors and LCD screen. Enclosure consists of two parts that are bolted together fitting around electronic parts. 3D model was designed using FreeCAD.

3D design of the enclosure for electronics device

Design of the enclosure for electronics device that consists of base PCB, several buttons, connectors and LCD screen. Enclosure consists of two parts that are bolted together fitting around electronic parts. 3D model was designed using FreeCAD.

3D design of the enclosure for electronics device

3807306
Development board with PIC24 micro controller for signal delay time measurement experiments. Design is based on tech notes about using PIC24 CTMU (Charge Time Measurement Unit). It has USB to serial connection and signal input output connections with fast edge output buffers and comparators.

PIC24 micro controller development board

Development board with PIC24 micro controller for signal delay time measurement experiments. Design is based on tech notes about using PIC24 CTMU (Charge Time Measurement Unit). It has USB to serial connection and signal input output connections with fast edge output buffers and comparators.

PIC24 micro controller development board

Development board with PIC24 micro controller for signal delay time measurement experiments. Design is based on tech notes about using PIC24 CTMU (Charge Time Measurement Unit). It has USB to serial connection and signal input output connections with fast edge output buffers and comparators.

PIC24 micro controller development board

3596583
Design and PCB layout of Arduino compatible ATMega micro controller board with PCA9685 PWM controller IC. PCB is small 4.5 x 7 cm four layer board with internal ground and power planes and pin header connections. It can be used for controlling 16 channels of led lightning or servo motors and takes much less space that full sized Arduino board with required shield.

AVR micro controller board design

Design and PCB layout of Arduino compatible ATMega micro controller board with PCA9685 PWM controller IC. PCB is small 4.5 x 7 cm four layer board with internal ground and power planes and pin header connections. It can be used for controlling 16 channels of led lightning or servo motors and takes much less space that full sized Arduino board with required shield.

AVR micro controller board design

Design and PCB layout of Arduino compatible ATMega micro controller board with PCA9685 PWM controller IC. PCB is small 4.5 x 7 cm four layer board with internal ground and power planes and pin header connections. It can be used for controlling 16 channels of led lightning or servo motors and takes much less space that full sized Arduino board with required shield.

AVR micro controller board design

Design and PCB layout of Arduino compatible ATMega micro controller board with PCA9685 PWM controller IC. PCB is small 4.5 x 7 cm four layer board with internal ground and power planes and pin header connections. It can be used for controlling 16 channels of led lightning or servo motors and takes much less space that full sized Arduino board with required shield.

AVR micro controller board design

Design and PCB layout of Arduino compatible ATMega micro controller board with PCA9685 PWM controller IC. PCB is small 4.5 x 7 cm four layer board with internal ground and power planes and pin header connections. It can be used for controlling 16 channels of led lightning or servo motors and takes much less space that full sized Arduino board with required shield.

AVR micro controller board design

3506001
Electronics device to demonstrate function of Schmitt trigger oscillator and logic gates. It features double sided PCB with surface mount components and powers from 3V Lithium battery. It contains signal generator with led illumination ring and soft power on/off button. Test point clips are provided for taking waveform measurements.

Surface mount PCB

Electronics device to demonstrate function of Schmitt trigger oscillator and logic gates. It features double sided PCB with surface mount components and powers from 3V Lithium battery. It contains signal generator with led illumination ring and soft power on/off button. Test point clips are provided for taking waveform measurements.

Surface mount PCB

Electronics device to demonstrate function of Schmitt trigger oscillator and logic gates. It features double sided PCB with surface mount components and powers from 3V Lithium battery. It contains signal generator with led illumination ring and soft power on/off button. Test point clips are provided for taking waveform measurements.

Surface mount PCB

Electronics device to demonstrate function of Schmitt trigger oscillator and logic gates. It features double sided PCB with surface mount components and powers from 3V Lithium battery. It contains signal generator with led illumination ring and soft power on/off button. Test point clips are provided for taking waveform measurements.

Surface mount PCB

Electronics device to demonstrate function of Schmitt trigger oscillator and logic gates. It features double sided PCB with surface mount components and powers from 3V Lithium battery. It contains signal generator with led illumination ring and soft power on/off button. Test point clips are provided for taking waveform measurements.

Surface mount PCB

Electronics device to demonstrate function of Schmitt trigger oscillator and logic gates. It features double sided PCB with surface mount components and powers from 3V Lithium battery. It contains signal generator with led illumination ring and soft power on/off button. Test point clips are provided for taking waveform measurements.

Surface mount PCB

Electronics device to demonstrate function of Schmitt trigger oscillator and logic gates. It features double sided PCB with surface mount components and powers from 3V Lithium battery. It contains signal generator with led illumination ring and soft power on/off button. Test point clips are provided for taking waveform measurements.

Surface mount PCB

9276211
Schematic and PCB design of ATmega 2560 control board for infrared light gate device. IR light gate uses additional PCBs with OSRAM SFH 4550 leds and Vishay TSSP4056 infrared receivers.

ATmega 2560 IR sensors control board

Schematic and PCB design of ATmega 2560 control board for infrared light gate device. IR light gate uses additional PCBs with OSRAM SFH 4550 leds and Vishay TSSP4056 infrared receivers.

ATmega 2560 IR sensors control board

Schematic and PCB design of ATmega 2560 control board for infrared light gate device. IR light gate uses additional PCBs with OSRAM SFH 4550 leds and Vishay TSSP4056 infrared receivers.

ATmega 2560 IR sensors control board

Schematic and PCB design of ATmega 2560 control board for infrared light gate device. IR light gate uses additional PCBs with OSRAM SFH 4550 leds and Vishay TSSP4056 infrared receivers.

ATmega 2560 IR sensors control board

4376667
Design of battery monitoring device with current sense amplifier and ATmega 328 to monitor battery voltage and current usage. Measurement data can be read from host device using I2C connection that is electrically isolated to prevent voltage level difference during high current spikes.

Battery monitoring board

Design of battery monitoring device with current sense amplifier and ATmega 328 to monitor battery voltage and current usage. Measurement data can be read from host device using I2C connection that is electrically isolated to prevent voltage level difference during high current spikes.

Battery monitoring board

Design of battery monitoring device with current sense amplifier and ATmega 328 to monitor battery voltage and current usage. Measurement data can be read from host device using I2C connection that is electrically isolated to prevent voltage level difference during high current spikes.

Battery monitoring board

Design of battery monitoring device with current sense amplifier and ATmega 328 to monitor battery voltage and current usage. Measurement data can be read from host device using I2C connection that is electrically isolated to prevent voltage level difference during high current spikes.

Battery monitoring board

Design of battery monitoring device with current sense amplifier and ATmega 328 to monitor battery voltage and current usage. Measurement data can be read from host device using I2C connection that is electrically isolated to prevent voltage level difference during high current spikes.

Battery monitoring board

6930916
Design of the enclosure for electronics device that consists of base PCB, several buttons, connectors and LCD screen. Enclosure consists of two parts that are bolted together fitting around electronic parts. 3D model was designed using FreeCAD.

3D design of the enclosure for electronics device

Design of the enclosure for electronics device that consists of base PCB, several buttons, connectors and LCD screen. Enclosure consists of two parts that are bolted together fitting around electronic parts. 3D model was designed using FreeCAD.

3D design of the enclosure for electronics device

Design of the enclosure for electronics device that consists of base PCB, several buttons, connectors and LCD screen. Enclosure consists of two parts that are bolted together fitting around electronic parts. 3D model was designed using FreeCAD.

3D design of the enclosure for electronics device

Design of the enclosure for electronics device that consists of base PCB, several buttons, connectors and LCD screen. Enclosure consists of two parts that are bolted together fitting around electronic parts. 3D model was designed using FreeCAD.

3D design of the enclosure for electronics device

Design of the enclosure for electronics device that consists of base PCB, several buttons, connectors and LCD screen. Enclosure consists of two parts that are bolted together fitting around electronic parts. 3D model was designed using FreeCAD.

3D design of the enclosure for electronics device

Design of the enclosure for electronics device that consists of base PCB, several buttons, connectors and LCD screen. Enclosure consists of two parts that are bolted together fitting around electronic parts. 3D model was designed using FreeCAD.

3D design of the enclosure for electronics device

3807306
Development board with PIC24 micro controller for signal delay time measurement experiments. Design is based on tech notes about using PIC24 CTMU (Charge Time Measurement Unit). It has USB to serial connection and signal input output connections with fast edge output buffers and comparators.

PIC24 micro controller development board

Development board with PIC24 micro controller for signal delay time measurement experiments. Design is based on tech notes about using PIC24 CTMU (Charge Time Measurement Unit). It has USB to serial connection and signal input output connections with fast edge output buffers and comparators.

PIC24 micro controller development board

Development board with PIC24 micro controller for signal delay time measurement experiments. Design is based on tech notes about using PIC24 CTMU (Charge Time Measurement Unit). It has USB to serial connection and signal input output connections with fast edge output buffers and comparators.

PIC24 micro controller development board

3596583
Design and PCB layout of Arduino compatible ATMega micro controller board with PCA9685 PWM controller IC. PCB is small 4.5 x 7 cm four layer board with internal ground and power planes and pin header connections. It can be used for controlling 16 channels of led lightning or servo motors and takes much less space that full sized Arduino board with required shield.

AVR micro controller board design

Design and PCB layout of Arduino compatible ATMega micro controller board with PCA9685 PWM controller IC. PCB is small 4.5 x 7 cm four layer board with internal ground and power planes and pin header connections. It can be used for controlling 16 channels of led lightning or servo motors and takes much less space that full sized Arduino board with required shield.

AVR micro controller board design

Design and PCB layout of Arduino compatible ATMega micro controller board with PCA9685 PWM controller IC. PCB is small 4.5 x 7 cm four layer board with internal ground and power planes and pin header connections. It can be used for controlling 16 channels of led lightning or servo motors and takes much less space that full sized Arduino board with required shield.

AVR micro controller board design

Design and PCB layout of Arduino compatible ATMega micro controller board with PCA9685 PWM controller IC. PCB is small 4.5 x 7 cm four layer board with internal ground and power planes and pin header connections. It can be used for controlling 16 channels of led lightning or servo motors and takes much less space that full sized Arduino board with required shield.

AVR micro controller board design

Design and PCB layout of Arduino compatible ATMega micro controller board with PCA9685 PWM controller IC. PCB is small 4.5 x 7 cm four layer board with internal ground and power planes and pin header connections. It can be used for controlling 16 channels of led lightning or servo motors and takes much less space that full sized Arduino board with required shield.

AVR micro controller board design

3506001
Electronics device to demonstrate function of Schmitt trigger oscillator and logic gates. It features double sided PCB with surface mount components and powers from 3V Lithium battery. It contains signal generator with led illumination ring and soft power on/off button. Test point clips are provided for taking waveform measurements.

Surface mount PCB

Electronics device to demonstrate function of Schmitt trigger oscillator and logic gates. It features double sided PCB with surface mount components and powers from 3V Lithium battery. It contains signal generator with led illumination ring and soft power on/off button. Test point clips are provided for taking waveform measurements.

Surface mount PCB

Electronics device to demonstrate function of Schmitt trigger oscillator and logic gates. It features double sided PCB with surface mount components and powers from 3V Lithium battery. It contains signal generator with led illumination ring and soft power on/off button. Test point clips are provided for taking waveform measurements.

Surface mount PCB

Electronics device to demonstrate function of Schmitt trigger oscillator and logic gates. It features double sided PCB with surface mount components and powers from 3V Lithium battery. It contains signal generator with led illumination ring and soft power on/off button. Test point clips are provided for taking waveform measurements.

Surface mount PCB

Electronics device to demonstrate function of Schmitt trigger oscillator and logic gates. It features double sided PCB with surface mount components and powers from 3V Lithium battery. It contains signal generator with led illumination ring and soft power on/off button. Test point clips are provided for taking waveform measurements.

Surface mount PCB

Electronics device to demonstrate function of Schmitt trigger oscillator and logic gates. It features double sided PCB with surface mount components and powers from 3V Lithium battery. It contains signal generator with led illumination ring and soft power on/off button. Test point clips are provided for taking waveform measurements.

Surface mount PCB

Electronics device to demonstrate function of Schmitt trigger oscillator and logic gates. It features double sided PCB with surface mount components and powers from 3V Lithium battery. It contains signal generator with led illumination ring and soft power on/off button. Test point clips are provided for taking waveform measurements.

Surface mount PCB

5.0 · 12 Reviews
Reviews
User Avatar

SX1262 FSK transmit & receive signal • $120 USD

Krist helped find a solution and made the task based on Semtech modems. Thanks!

Alexander S.

@defencore

•

Flag of

Kiev, Ukraine

•

2 years ago

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Implementation of Zephyr driver for sensor ST LSM303AGR • €300 EUR

He delivered all what has been specified within the technical requirements and the code he prepared was well documented and profesionally prepared...also the communication was smooth and clear. I will definately work with Krists again in the near future and I would recommend him to others who need professional and correct attitude towards the customer and work that needs to be done. Regards, Mitja O.

Davor O.

@omitja

•

Flag of

Videm - Dobrepolje, Slovenia

•

3 years ago

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AC Voltage Measurement With Potential Transformer • $50 USD

He is a humble developer. Very good in communications.

Michael M.

@mcmsat

•

Flag of

Nnewi South LG, Nigeria

•

4 years ago

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Modify existing python script to work properly with a specific EEPROM • $300 NZD

Took me a while to find someone to do this task, I finally found Krists who was able to do it with ease! Made life much easier! Thanks Again

Michael F.

@navisolutions1

•

Flag of

Gisborne, New Zealand

•

5 years ago

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R

Connection between Arduino nanos and Raspberry Pi (archived) • €160 EUR

Krists did such an amazing job with everything I asked for. The work was excellent quality and worked with no effort on my side. He was on time and very helpful with explaining all the setup and how to make the project work. I would definitely recommend him to anyone and would work with him again. Thank you so much for the work, I am completely satisfied with it :)

Maryam A.

@rjahjah17

•

Flag of

Sankt Augustin, Germany

•

5 years ago

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