Circuit Project Electronic

That circuit uses the MSM6322GSK which is only available in small 24 pin plastic SOP style package. A speech pitch converter IC that operates in real time and requires very few external components. It has a microphone preamplifier and line level input and the output requires only a single transistor to directly drive a loudspeaker. [...]

The components connected to 555 timer IC1’s pin 2 provide a trigger synchronized with the ac input’s zero crossing. In conventional 555 fashion, R1, R2, and Cdetermine IC1’s period. However, the RC delay network connected between IC1’s pins 1 and 5 causes IC1’s period to approach its full value only gradually, rather than instantly at [...]

Photo sensors bridge the gap between light and electronics. Microchip’s Programmable Gain Amplifiers (PGAs) are not well suited for precision applications (such as CT scanners), but they can be effectively used in position photo sensing applications minus the headaches of amplifier stability. When the two, six or eightchannel PGA is used in this system, the [...]