This circuit was found in an American documentation from the 90s. It consists of a variable with a triac in which the load current can be controlled, monitored by an ammeter.
This new AMS device consists of a digital color sensor and proximity sensor that also incorporates an infrared...
This amplifier produces a few hundred milliwatts of Input 100 pF audio over a load of 4 or 8 ohms...
This transmitter for modulated infrared remote control was found in documentation from the 90s....