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  • Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

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  • How to operate an A7672S 4G modem with a computer

    Resource 'How to operate an A7672S 4G modem with a computer'

    by Nikhil Angnihotri, EngineersGarage.com As 5G is in full swing in the telecom segment, 4G modems are fast occupying the embedded space. The 4G GSM modems are useful in embedded systems for several reasons. 1. They provide a high-speed wireless connection to the internet. This allows embedded systems to access and process data in real time, which is essential for telematics, industrial automation, and remote monitoring applications. 2. The 4G GSM modems are relatively compact and...
Resource icon crutschow
Power Saving DC Solenoid Driver Provides Initial Full Power Actuation Followed By PWM Hold 2018-03-31
Circuit applies full actuation power to solenoid with PWM hold reducing power to 12-25% of nominal
0.00 star(s) 0 ratings
Updated
Resource icon crutschow
Low-Dropout CC/CV 12V Lead-Acid Battery Charger With Auto Trickle-Charge 2018-03-11
Minimal circuit for auto CC/CV charging. Option allows pot adjustment of charge current.
0.00 star(s) 0 ratings
Updated
Resource icon crutschow
Low Drop, High-Side Sense Current Limiter Adjusts to Zero 2018-03-08
Two simple high-side sense current limit circuits adjust to zero current and have low voltage drop
0.00 star(s) 0 ratings
Updated
Resource icon crutschow
Binary ↔ BCD Conversion Using Counters 2018-02-23
Combination of Binary & BCD counters do Binary↔BCD conversions.
0.00 star(s) 0 ratings
Updated
Resource icon crutschow
Simple 15V, 1.5A, CC/CV Bench Power Supply Circuit - (With Optional Laptop Charger Source) 2018-02-05
Inexpensive, single regulator IC power supply with I and V adj. to zero, includes I & T monitors
5.00 star(s) 1 ratings
Updated
Resource icon crutschow
Simple & Inexpensive Ideal-Diode MOSFET Circuits 2017-09-19
Good for low-drop diode applications, such as blocking battery back-charging or brownout protection
4.50 star(s) 4 ratings
Updated
Resource icon Ian Rogers
Sound / Frequency on a micro 2017-07-30
Sound
5.00 star(s) 1 ratings
Updated
Resource icon crutschow
Push-Button Relay Latch Circuit With Simple Debounce 2017-06-20
PB alternate action circuit uses CD4013 FF with simple debounce to control relay (or other load).
0.00 star(s) 0 ratings
Updated
Resource icon crutschow
LM317 CC/CV 12V Lead-Acid Battery Charger With Automatic Trickle Charge 2017-06-18
Lead-acid battery charger starts with constant-current and ends with constant-voltage trickle charge
0.00 star(s) 0 ratings
Updated
Resource icon crutschow
Resonant Inductive Charging of Capacitor Improves Efficiency And Amount of Stored Energy 2017-05-30
Capacitor resonant charging can nearly double the charge efficiency and quadruple energy stored.
5.00 star(s) 1 ratings
Updated
Resource icon crutschow
Analog Max/Min Value or Bi-Level Clamp Circuits 2017-05-01
Circuit outputs the min. or max. value of several analog inputs, or provides accurate bi-level clamp
5.00 star(s) 1 ratings
Updated
Resource icon crutschow
Missing Pulse Detector (Watchdog Timer) Circuits Using LM339/393, CD4093, or 555 2017-04-15
Watchdog timer circuits, will timeout on either high or low hang
0.00 star(s) 0 ratings
Updated
Resource icon A
Momentary latching relay 2011-12-29
Just for fun I designed and built this simple circuit which drives a monostable relay by a singol m
0.00 star(s) 0 ratings
Updated
Resource icon crutschow
Triple Output Tracking Power Supply Uses Standard 3-Terminal Regulators, Adjusts to Zero Out 2017-03-09
Single +output plus dual +/- tracking output supply using common 3-terminal regulators goes to 0V.
0.00 star(s) 0 ratings
Updated
Resource icon crutschow
Efficient MOSFET Bridge Rectifier for Resistive Loads, Or Input Power Auto Polarity Gating 2017-03-07
MOSFET bridge for efficient resistive load rectification, or indifference to input power polarity.
0.00 star(s) 0 ratings
Updated
Resource icon crutschow
PWM Voltage Control Of Standard Linear IC Regulators 2017-02-13
PWM allows easy control of linear regulator output voltage for μP based power supplies
0.00 star(s) 0 ratings
Updated
Resource icon crutschow
Low Power CMOS PWM Circuit With Buffer Output Requires Only 5 Components 2017-02-09
CD4106 PWM circuit uses only 2 diodes, 1 capacitor, and 1 potentiometer
0.00 star(s) 0 ratings
Updated
Resource icon crutschow
Single Supply Non-Inverting Av=1 Op Amp Circuit With Simple Offset Voltage Calculation 2017-02-08
Circuit generates Av=+1 with simple offset calculation using std. resistor values
0.00 star(s) 0 ratings
Updated
Resource icon crutschow
Simple PWM Circuit For Lamp Dimming, etc., Improves On 555 PWM Circuits 2017-01-29
PWM circuit has voltage control of 0% to 100% duty-cycle
0.00 star(s) 0 ratings
Updated
Resource icon crutschow
Simple, Efficient, Inexpensive, High-Power LED Constant-Current Switching Supply 2017-01-25
Constant-current hysteretic buck regulator supply for high power LEDs, efficiency of 90%
0.00 star(s) 0 ratings
Updated

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