High-Voltage Supply Circuit
This circuit uses a transistor oscillator and a voltage multiplier to charge CIO and CI 1 to a high voltage. When the spark gap breaks down, T2 produces a high...
Single-Chip Dc Supply Circuit
Direct derivation of 5 to 24 Vdc from ac mains, without a transformer is possible with tiiis circuit. Note that a direct mains connection to the dc output exis...
Negative Voltage Supply Circuit
The combination Hartley oscillator/step-up transformer shown in A can generate significant negative high voltage,...
Photomultiplier Supply Circuit
A Cockcroft-Walton voltage multiplier supplies the stepped voltage required for the dynodes of the PMT without the power-wasting voltage- divider resistor...
Fluorescent Tube Power Supply Circuit
A 2N3055 oscillator (Ql) drives a homemade transformer, wound on a Vk, ferrite rod. S2 is used as a filament switch and it can be eliminated, if desired....
High Voltage Dc Generator Circuit
In the miniature high-voltage dc generator, the input to the circuit, taken from a 12-Vdc power supply, is magnified to provide a 10,000-Vdc output causing a p...
Inrush Current Limiter Circuit
A 7805 can be configured as a constant-current regulator, to serve as an inrush current limiter. Rl will have 5 V across it at all times so the total current t...
Soldering Iron Control Circuit
A current control to temperature regulate a soldering iron uses a high-voltage integrated regulator, TL783 (Ul)....
Three-Power-Level Triac Controller Circuit
Three power levels are supplied by the two logic inputs of this enhanced circuit. R5, D4, D5, and 02 form a power supply for the logic IC. ...
Laser Power Supply Circuit
This supply generates an initial high voltage for ignition purposes. After ignition, the supply generates about 1300 to 1500 V. If a higher ignition voltage (t...
Laser Power Supply And Starting Circuit Circuit
This circuit delivers 10 kV peak, then limits current to 7.5 mA @ 2 kV. The resistors shown provide ballasting. ...
Efficient Laser Supply Circuit
Driving Helium-Neon Lasers can be simplified considerably using This power-supply configuration. When power is applied, the laser doesn`t conduct and the volta...
Inrush Current Limiter Circuit
Q1 is an npn Darlington and Q2 is a prip Darlington. MOV1 is a metal-oxide varistor and R8 is an thermistor for limiting inrush current. This circuit limits a...
Simple Power Down Circuit Circuit
This circuit, adds a power-down function to analog I/O ports (for example, the AD7769 and AD7774). Moreover, the diodes ordinarily needed to protect the device...
2000V Low-Current Power Supply
In this circuit Ql, Q2, Rl, and CI form a multivibrator. The square wave that results from the oscillation...
Laser Power Supply
ICl is a 555 timer running at about 16 kHz. This IC drives Ql, a TIP146, which produces a 12-V square wave across Tl pri...
Voltage Doublers
During the first half-cycle (Fig. 99-5(a)), Dl conducts, D2 cuts off, CI changes to 170 V peak, and C2 discharges through ...
10000Vdc Supply
A CMOS oscillator (U1A) drives. U1B through U1F, which drives Ql, which generates a 12-Vpp square wave across the primary ...
Voltage Multiplier
Figure 99-l(a)"s circuit exhibits a high-output impedance as a result of the small effective capacitance of the series-c...
Power Supply Monitor /Memory Protector
This circuit detects low-voltage supply conditions, down to 0.6 V. Dl sets the trip point of the cir...