- Stable 5v from Old Cells
The benefit of stepping down the voltage of the battery is that we can give a constant/stable performance for our devices until the battery runs out the power. That’s only one example of voltage regulation, actually there can be more advantage depends on your need. Here is one example of voltage regulator circuit constructed from …[Read More]
- Intercom
Below is a 2-station intercom using common 8R mini speakers. The “press-to-talk” switches should have a spring-return so the intercom can never be left ON. Power the speaker from a separate power supply is the secret to preventing instability (motor-boating) with a high gain circuit like this. An extra station (or two extra stations …
- White LEDs Mains Night Light
WARNING: Don’t touch the circuit when plugged to the mains supply, this will cause a lethal electrical shock since it’s not isolated from the mains supply. A column of 10 white LEDs is illuminated by this circuit. The flicker is prevented by 10u capacitor and reduced by 100R resistor.
TPS2331 Hot Swap Controller
The load inrush current is limited by the TPS2331. The system also protected by TPS2331 from a load fault in its traditional tole as a hot-swap controller. However, the TPS231 must protect the system against a power supply module fault in an OR-ing circuit. The TPS2331 is required by the former role to trip …
Lab Power Supply
This bench power supply circuit is suitable for your electronic experiment lab. This circuit can be built no on a piece of copper-laminate. The Bench Power Supply was designed to use old lantern batteries, “D”, and “C”. This circuit can produce at least 12v -14v from old batteries and cells. As a heat-sink, this circuit …[Read More]
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