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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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Circuit combines the brake-signal and turn-signal into one lamp with no added power connection
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Charger performs recommended charging function for rechargeable NiZn batteries
5.00 star(s) 3 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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Weight Scale built using SFE's OpenScale platform
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Circuit generates an equivalent high power resistance that can be adjusted with a potentiometer.
4.00 star(s) 1 ratings
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A simple circuit using the common CD4049 to generate the Radio PB Function
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Notch filter Q is largely independent of component tolerances and notch frequency adjustment.
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One-shot timer uses no power when quiescent, useful for battery powered circuits
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Simple, efficient, lead-acid battery charger auto switches from CC to CV mode
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Circuit applies full actuation power to solenoid with PWM hold reducing power to 12-25% of nominal
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Minimal circuit for auto CC/CV charging. Option allows pot adjustment of charge current.
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Two simple high-side sense current limit circuits adjust to zero current and have low voltage drop
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Combination of Binary & BCD counters do Binary↔BCD conversions.
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Good for low-drop diode applications, such as blocking battery back-charging or brownout protection
4.67 star(s) 3 ratings
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PB alternate action circuit uses CD4013 FF with simple debounce to control relay (or other load).
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Capacitor resonant charging can nearly double the charge efficiency and quadruple energy stored.
5.00 star(s) 1 ratings
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