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17 Questions

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ESP8266 - free GPIOs for relay switching

esp8266

Jan 15 at 18:55 Juraj 341

vote

answer

views

ESP8266 - should Vin pin supply 5V?

esp8266 nodemcu

Oct 9 '18 at 17:55 SamGibson 15k

votes

answers

views

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

dc-dc-converter

Aug 7 at 20:10 JRE 40.1k

votes

answer

views

Heating up using an LM317 voltage regulator

voltage-regulator

Jul 4 at 19:20 JRE 40.1k

votes

answers

views

ESP32. - selecting resistors for voltage divider

voltage-divider

Jun 19 at 5:09 Guy . D 153

votes

answer

views

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

voltage-regulator power-electronics ldo solar-energy

Jun 15 at 7:19 bitbangers 7

votes

answer

views

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

voltage-regulator

Apr 27 at 5:52 JRE 40.1k

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answers

views

Voltage Regulator 317 - Selecting Resistors ( R1, R2 )

voltage-regulator

Apr 13 at 18:39 Justme 34.2k

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answer

views

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

voltage switch-mode-power-supply esp8266

Feb 21 at 9:15 User323693 8,761

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answers

views

Help in using a const Voltage, const Current MPPT

solar-charge-controller mppt

Feb 21 at 8:24 Guy . D 153

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answer

views

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

low-power esp8266 nodemcu

Jan 24 at 7:08 Guy . D 153

votes

answers

views

Fail to reboot after recharge, ESP32/ESP8266 using a MPPT and 18650 battery

solar-cell esp8266 solar-energy sleep

Jan 24 at 7:05 Guy . D 153

votes

answers

views

Noisy or malfunctioning PIR HC-SR505 sensor

sensor pir

Nov 15 '19 at 13:10 SamGibson 15k

votes

answers

113

views

How to select a MOSFET when using 3.3v / 5v Logic level [duplicate]

arduino mosfet esp8266

Sep 17 '19 at 17:12 Reinderien 1,422

votes

answers

239

views

Logic Level MOSFET IRLZ44N - under Wemos mini

mosfet logic-level

Aug 10 '19 at 16:12 Guy . D 153

votes

answers

views

ESP8266 - PULLUP resistor using Arduino code

arduino esp8266

Nov 3 '18 at 15:43 Juraj 341

votes

answers

151

views

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

relay

Jul 18 '18 at 15:19 Jack Creasey 18.8k

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17 Questions

ESP8266 - free GPIOs for relay switching

ESP8266 - should Vin pin supply 5V?

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

Help in using a const Voltage, const Current MPPT

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

Fail to reboot after recharge, ESP32/ESP8266 using a MPPT and 18650 battery

Noisy or malfunctioning PIR HC-SR505 sensor

How to select a MOSFET when using 3.3v / 5v Logic level [duplicate]

Logic Level MOSFET IRLZ44N - under Wemos mini

ESP8266 - PULLUP resistor using Arduino code

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