Using a transistor ... control circuits. We’ve embedded his twenty-minute video after the break. In it he talks about the use of transistors, the difference between NPN and PNP transistors ...

Push-pull sourcing and sinking, as it’s called, happens in two transistors ... Circuits in the sensor detect which output the controls need. Such sensors connect loads in light-on or dark ...

We break down the essential component of modern electronics—the transistor. Transistors are the building blocks behind most of today’s electronic devices, and understanding how they work is key to ...

In the early days, PNP bipolar transistors were common, but the bulk of circuits you see today use NPN transistors. As [Aaron Danner] points out, many people think PNP transistors are “backward ...

The circuit utilizes the light sensing property of LDR to activate the circuit. The LDR (Light Dependent Resistor) has very high resistance as high as 10 Meg ohms in dark which reduces ... of IC1 goes ...

A versatile signal-conditioning circuit ... input to a pnp type or incorporate it in the last stage of the sensor design to generate both npn and pnp outputs. The npn and pnp transistors used ...

It is also possible to produce circuits controlled by the heat ... from the heat-sensitive electrolyte, which acts as sensor, to the transistor circuit is sufficient. One sensor can be combined ...

The work is described in ‘Compact source-gated transistor analog circuits for ubiquitous sensors‘, published by the IEEE and available in full without payment.