555 Code Oscillator (CB26324E)

Found in a 1990s Popular Electronics, this circuit produces a tone on a small speaker. The keyer directly controls the power supply.

| Clique na imagem para ampliar |

Broadband amplifier (CB8402E)
This circuit that can amplify signals from 0 to 30 MHz was found in a 90s Popular Electronics....
Hearing and Motion Sensor Platform
August 2017 - STMicroelectronics' BlueCoin development environment is available at Mouser...
Current Limit (CIR035)
In this circuit the output current is limited by R3. For a 300 mA current, R3 must have 12 Ω. For...