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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.

  • 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.

Electronic Projects

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High-side, 2-terminal circuit replaces vehicle mechanical flasher unit.
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A Small and efficient DC to DC Step Down (Buck) Converter
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Powerful DC Motor Driver using Power Mosfets [30A, half Bridge]
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555 VCO (Voltage Controlled Oscillator) uses constant current control to give wide control range.
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Paralleling LM317 regulators for higher current, using TL431 reference for excellent performance
4.80 star(s) 5 ratings
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Circuit separates combined turn/stop signals for separate turn/stop lamps using no added power
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Easy to build digital coil-less (100KHz step size) FM transmitter
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Circuit combines the brake-signal and turn-signal into one lamp with no added power connection
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Radio push-button function is provided by a simple circuit using a CD4011 in a latch configuration
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TL431 provides accurate, adjustable voltage crowbar function for circuit overvoltage protection
5.00 star(s) 3 ratings
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LV, LP, CC driver allows two alkaline or NiMH cells to steadily power a Red LED until discharged.
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Charger performs recommended charging function for rechargeable NiZn batteries
5.00 star(s) 3 ratings
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Low parts-count circuit monitors multiple alarm switches, includes arm and entry delays
5.00 star(s) 1 ratings
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Lead-acid battery charger using LM317 provides auto CC charge, CV top-off, and final trickle-charge
5.00 star(s) 2 ratings
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Weight Scale using SFE's OpenScale platform
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PB latch circuit provides on/off delay function to prevent accidental power switching
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Circuit combines PWM controlled constant-current source with 3rd-order filter using one opamp
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Weight Scale built using SFE's OpenScale platform
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Stepper motor driver applies full voltage for fast stepping, then PWM for low power hold
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