User guyd

0 votes

3 answers

410 views

Adjusting input voltage for ESP8266 (difference between linear regulator to step down)

asked Nov 20, 2021 at 19:46

0 votes

0 answers

338 views

Solar charging a 18650 Battery ( MPPT vs TP4065 )

asked Apr 16, 2021 at 5:43

0 votes

1 answer

30 views

Powering externally a 3v a 2 relay module

asked Jan 7, 2021 at 17:37

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2 answers

691 views

Using a KA75330ZTA voltage detector

asked Dec 27, 2020 at 16:53

0 votes

0 answers

76 views

Selection of DC-DC converter for boosting 4.2V to 5.0V

asked Aug 7, 2020 at 20:05

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1 answer

280 views

Heating up using an LM317 voltage regulator

asked Jul 4, 2020 at 18:59

1 vote

2 answers

3k views

ESP32. - selecting resistors for voltage divider

asked Jun 18, 2020 at 20:37

0 votes

1 answer

647 views

Using MCP1700-3302E LDO for Arduino/ ESP32 Solar projects

asked Jun 14, 2020 at 20:09

0 votes

1 answer

455 views

External power to WEMOS mini using 3.3V 1W Zener diode

asked Apr 27, 2020 at 4:47

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2 answers

376 views

Voltage Regulator 317 - Selecting Resistors ( R1, R2 )

asked Apr 13, 2020 at 18:14

0 votes

1 answer

72 views

Is it possible to use a Zener diode as a High Pass Voltage

asked Feb 21, 2020 at 8:36

1 vote

1 answer

290 views

NodeMCU v.1 / WEMOS Mini - Fail to Wake up from deep sleep

asked Dec 15, 2019 at 5:49

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1 answer

386 views

Noisy or malfunctioning PIR HC-SR505 sensor

asked Nov 15, 2019 at 10:06

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0 answers

799 views

Logic Level MOSFET IRLZ44N - under Wemos mini

asked Aug 10, 2019 at 14:48

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2 answers

36k views

ESP8266 - PULLUP resistor using Arduino code

asked Nov 2, 2018 at 8:58

3 votes

1 answer

3k views

ESP8266 - free GPIOs for relay switching

asked Oct 19, 2018 at 8:50

3 votes

1 answer

5k views

ESP8266 - should Vin pin supply 5V?

asked Oct 9, 2018 at 16:40

0 votes

2 answers

264 views

OptoCoupler Relay and EMI - How to be sure it is not a "regular relay"

asked Jul 13, 2018 at 15:12

Stack Exchange Network

18 Questions

Adjusting input voltage for ESP8266 (difference between linear regulator to step down)

Solar charging a 18650 Battery ( MPPT vs TP4065 )

Powering externally a 3v a 2 relay module

Using a KA75330ZTA voltage detector

Selection of DC-DC converter for boosting 4.2V to 5.0V

Heating up using an LM317 voltage regulator

ESP32. - selecting resistors for voltage divider

Using MCP1700-3302E LDO for Arduino/ ESP32 Solar projects

External power to WEMOS mini using 3.3V 1W Zener diode

Voltage Regulator 317 - Selecting Resistors ( R1, R2 )

Is it possible to use a Zener diode as a High Pass Voltage

NodeMCU v.1 / WEMOS Mini - Fail to Wake up from deep sleep

Noisy or malfunctioning PIR HC-SR505 sensor

Logic Level MOSFET IRLZ44N - under Wemos mini

ESP8266 - PULLUP resistor using Arduino code

ESP8266 - free GPIOs for relay switching

ESP8266 - should Vin pin supply 5V?

OptoCoupler Relay and EMI - How to be sure it is not a "regular relay"