Kirlian Photography power supply
The CD4049 is a hex inverter that can be configured to operate as a multivibrator, generating square wave signals. In this application, the CD4049 outputs are connected to the bases of a Darlington pair, which consists of two bipolar junction transistors (BJTs) configured to amplify current. This arrangement allows for significant current gain, enabling the control of larger loads, such as a transformer.
The transformer (TR2) connected to the Darlington pair serves as the output stage of the circuit, converting the amplified signal into a high-voltage alternating current (AC) output. The frequency of the output AC can be varied by adjusting the resistor-capacitor (RC) timing network associated with the multivibrator configuration. This flexibility allows the circuit to be used in various applications requiring different AC frequencies and voltages.
To ensure stable operation, the circuit may include additional components such as diodes for flyback protection, capacitors for filtering, and resistors to limit current. Proper heat dissipation measures should also be considered for the Darlington transistors, as they can generate significant heat under load.
Overall, this configuration provides an efficient means to generate a variable-frequency AC supply suitable for various applications, including motor control, power supplies, and signal generation.CD4049 IC multivibrator circuit drives a Darlington connected transistor pair, which drives TR2, a transformer. This device is essentially a high-voltage variable-frequency ac supply. 🔗 External reference
Related Circuits
Nearly all modern computers are equipped with logic blocks that facilitate the implementation of a USB port. A USB port can deliver over 100 mA of continuous current at 5V to peripherals connected to the bus. Therefore, it serves...
V1 and V2 are set to 5V in the simulation, but they could also be set to 10V to eliminate the need for a second power supply. Alternatively, if logic level FETs can be sourced at that higher voltage,...
The BA5406 is a dual OTL (output transformerless) monolithic power integrated circuit (IC) featuring two high-output speaker amplifier circuits. It operates effectively with a supply voltage (Vcc) of 12 V and a load resistance (Rl) of 3 Ohms. At...
This circuit represents a basic version of a commercial uninterruptible power supply (UPS), providing a constant regulated output of 5 volts and an unregulated 12-volt supply. In case of a power failure, the battery seamlessly takes over, ensuring there...
USB Battery Charger for Lithium Ion batteries using the LM3622 is a specialized charger circuit designed to operate with power sourced from a USB connection. The current consumption of the LM3622 is limited to 400mA by a resistor (R1),...
All miniature electronic devices operate off batteries. Some of them require higher than the standard battery voltages to function efficiently. Miniature electronic devices, which include a wide range of applications from portable gadgets to remote sensors, typically rely on battery...