safe

Arduino Safe With Multivibrator Changeable 4-digit Combination

This instructable will explain how to wire, code, and build a functioning DIY arduino safe with multivibrator changeable 4-digit combination. Well what does that mean? A arduino safe with multivibrator changeable 4-digit combination is a functioning safe with a changeable password/combination, it features a series of multivibrator circuits to create the 4-digit combination, a input …

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Safe and simple AC PWM Dimmer for arduino / Raspberry pi

Dimmer With  MOSFET This circuit shows that dimmers intended for use at mains voltage do not always have to contain a triac. Here, a MOSFET (BUZ41A, 500 V/4.5A) in a diode bridge is used to control the voltage across an incandescent bulb with pulse-width modulation (PWM). The power supply voltage for driving the gate is …

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