Build a Symmetrical ±3V to ±20V Circuit from +6V to +40V

Description

Frequently, the requirement arises for a balanced voltage, yet immediate access to such a value isn't readily available from a standard power supply. Consequently, it is assumed that a balanced voltage will be generated from a single source. This can be achieved with the assistance of IC1. The resulting symmetrical voltage offers a reduced value compared to the input, providing an output of ± 3V to ± 20V at a current capacity of 3Amps. For instance, if the circuit receives a supply of + 24V, the output will yield a symmetrical voltage of ± 12V. The reference point of zero volts is established at the output of IC1. Capacitors C1 and C2 should be positioned as close as possible to IC1, while C3 and C4 should be situated directly above the output pins of IC1. If the circuit is manufactured on a printed circuit board, the trace pathways must be sufficiently robust to accommodate potential currents of up to 3Amps. The connection cables also require adequate cross-sectional dimensions. Furthermore, IC1 should be mounted on an appropriate heatsink to dissipate heat effectively. [Security Warning: Ensure proper grounding to prevent electrical hazards.]

Circuit diagram

Part List

Description of IC1

IC1, identified as L165, is a general-purpose integrated circuit commonly used as a voltage follower and buffer. It is a three-terminal device offering good stability and a relatively high input impedance. This IC is a fundamental building block for creating balanced voltage outputs, precisely managing signal levels and isolating circuits from potential loading effects. Its main function is to faithfully replicate the input voltage while minimizing the impact of the load connected to its output. [Security Warning: Observe polarity when connecting the IC to avoid damage.]