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Power supply circuit diagrams
October 12, 2010
This supply uses no heavy step down transformer and has an extremely low parts count. The circuit can be built very small and can supply small currents for small projects. The major downfall of this... [more]
October 12, 2010
Power supplies that are intended to be used with TTL logic circuitry must guard against over-voltage, which can destroy TTL chips very rapidly. The duration of over-voltage that can destroy TTL chips is much too... [more]
October 12, 2010
A Variable DC Power Supply is one of the most useful tools on the electronics hobbyist's workbench. This circuit is not an absolute novelty, but it's simple, reliable, "rugged" and short-proof, featuring variable voltage up... [more]
October 5, 2010
This simple and inexpensive circuit can produce a dual (positive and negative) voltage from a single supply input. It is therefore extremely useful for powering opamp and other circuits that require a dual voltage from... [more]
October 3, 2010
The TPS6420x controller is designed to operate from one to three series-connected cells or from a 3.3 V or 5 V supply obtained from a USB port. At its output it can produce 3.3 V... [more]
circuit from:http://www.extremecircuits.net/2010/05/step-down-converter-controller.html
October 3, 2010
Readers who do not care to modify the power supply of an old PC into a suitable halogen power source (see our April 2006 issue), may find the present design a welcome alternative. The circuit... [more]
circuit from:http://www.extremecircuits.net/2010/05/alternative-halogen-power-supply.html
October 3, 2010
Following a hunch, the author discovered (or re-discovered?) that all plants carry an electric charge relative to the ground. This charge is more or less constant regardless of the size of the plant - a... [more]
October 2, 2010
The losses in a bridge rectifier can easily become significant when low voltages are being rectified. The voltage drop across the bridge is a good 1.5 V, which is a hefty 25% with an input... [more]
circuit from:http://www.extremecircuits.net/2010/05/power-mosfet-bridge-rectifier.html
September 30, 2010
People often forget that many voltage regulator ICs have an upper limit (usually 35 V) on the input voltage they can handle. That applies primarily to types with a fixed output voltage. Adjustable voltage regulators... [more]
circuit from:http://www.extremecircuits.net/2010/05/protection-for-voltage-regulators.html
September 30, 2010
This circuit idea is certainly not new, but when it comes to making a trade-of between using a small, short-circuit proof transformer or a capacitive voltage divider (directly from 230 V mains voltage) as the... [more]
circuit from:http://www.extremecircuits.net/2010/05/12v-fan-directly-on-220v-ac.html
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