Bipolar power supply for battery instruments
To generate regulated ± 5-V supplies from a pair of dry batteries, the circuit of Fig. 1 is commonly used. In order to give protection from inadvertent rever...
400-Volt 60-watt push-pull power supply
The design delivers a regulated 400-V, 60-W output. The TL494 switching regulator governs the operating frequency and regulates output voltage. Rl and Cl determ...
Bench top power supply
A tapped transformer drives a diode bridge (D1-D4) and two 2500 µ¥ filter capacitors (Cl and C2), that provide a no-load voltage of 37 or 47 volts, depend...
Variable current source 100ma-2amp
The output current is set by the resistor R in the collector of Tr2, which may be varied to offer a range of output currents from 100 mA to 2 A with fine contro...
Micropower supply
The circuit uses a CA3440 BiMOS op amp and CA3086 transistor array. The no-load current from 5-volt supply is 1.5 µ A. ...
Switch mode power supply
This buck-derived circuit provides up to 8 A at 5 Vdc operating off 24 to 32 Vdc. The two power MOSFETs in the circuit conduct alternately for equal periods. Sw...
5V supply
This circuit protects microprocessor systems from "brownouts" without the expense of an uninterruptible power supply. Designed around a small 9-V nickel cadmium...
8-Amp regulated power supply
This supply is powered by a transformer operating from 120 Vac on the primary and providing approximately 20 Vac on the primary, and providing approximately 20 ...
Stabilizing a laser discharge current
The circuit uses a free-running push-pull dc to dc high voltage converter to get the necessary voltage for the laser plasma tube supply. The supply voltage Vc o...
Fast circuit breaker
This 115 Vac, electronic circuit breaker uses the low drive power, low on resistance and fast turn off of the TMOS MTM15N50. The trip point is adjustable, LED f...
Over-voltage protection circuit
A silicon-controlled rectifier is installed in parallel with the 12-V line and connected to a normally-closed 12-V relay, K1. The SCR's gate circuit is used to ...
Dual supply for audio amplifiers
Most amps acoustic frequencies that make our readers, instead of a transformer power, sometimes required two or sometimes three. This tactic is more common in a...
Photocell power supply (MAX630)
This circuit delivers either 4.8 or 7.2 V regulated at 15 mA with a 3-V input from a bank of photocells. R1 should be 453 k? for a 7.2-V output and 274 k? for a...
Kirlian Photography power supply
CD4049 IC multivibrator circuit drives a Darlington connected transistor pair, which drives TR2, a transformer....
13KV High voltage power supply
This high-voltage power supply has an inverter around Q1 that supplies 150-V pulses to the converter of SCR1 and C2. The output of ?2 is a 4.5-kV pulse that is ...
High Voltage Power Supply 10kV
Be very carefull with this power supply because uses 220V mains and has 10KV at output....
Anti-RF filtered power supply 12-14 Volt / 3A
This power supply is dedicated for use with rf equipments like, linear amplifiers, transmitters, receivers, and in every application that clean an-noisy signal ...
Phase Control Circuit
The most elementary application is a half-wave control circuit. The thyristor is acting both as a power control device and as a rectifier, providing variable p...
Single to double power with CA3140
Another circuit for a balanced diet from a single voltage network. In fact, this is a uitbreding the other voltage divider circuit using a some power darling to...
5 A stabilized power supply
This is a simple but powerful nutrition that less than 5 A can deliver. The circuit works by using a normal type 78xx voltage regulator and a buffer transistor....