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Precision Amplifier With Digital Control
This circuit is similar to the preceding circuit of the attenuator. Gain of up to 100 can be achieved in this configuration, which is usef...
Simple Steam Whistle
This circuit consists of six square wave oscillators. Square waves are made up of a large number of harmonics. If six square waves with...
Simple Electrification Unit
The circuit is intended for carrying out harmless experiments with high-voltage pulses and functions in a similar way as an electrified fe...
Strip LED Lamp
Strip LEDs are available in different colours powered by direct current (DC) source. These LEDs are available as surface mount devices with...
Upgrade Your USB Hub
Problems can arise with USB hubs that are powered from a PC when gadgets plugged into them draw too much current. This is often the case wi...