Feb 17, 2020 · Simple Light Activated Relay Circuit—If you are looking for a circuit that turns on the relay when light comes. It is a simple light activated relay circuit. It will control load on-off with light. 7 touch switch circuits projects—Many how to make a simple touch switch circuit project. To build easy. An Op Amp Tutorial - Derivation of the op amp open-loop transfer function, the gain-bandwidth product, and the slew rate. The Fisher KX-200 (Fisher KX200) vacuum tube amplifier was marketed in kit form in the 1960s. The schematic doesn't seem to exist on the internet.
An easy step-by-step guide go making a homemade wireless antenna, for a fraction of the cost of commercial antenna. Uses readily available parts, and requires no specialist tools or knowledge. Or in geek speak - a diy homebrew omnidirectional colinear dipole design suitable for 802.11 wifi compatible hardware with external antenna connector.