This Diode tester circuit can check the diode the good or bad and also can indicate its polarity. using op-amp 741IC and LED for display. [...]
If you need a dual power supply. But you only have a single supply source. So should build this power supply splitter circuit.
You have a good power amplifier and speaker. You are listening to music. But the sound is very light. The problem has many reasons. One reason for the problem is…
t is Treble Booster circuit help give the sound of music that you listens to bright go up. it is cheap, easy to build because a few pats with IC-741.
This is strength meter circuit that it can test we strong, by catch 2 metals. From that time squeeze meet. It will make LED stick bright arrange prevent according to one's ability of squeezing the metal. The work of the circuit uses our body is formed lead the electricity changes to reach in the circuit.
For control the voltage battery is steady, output is fixed to 8V, low ripple voltage about 1 mV at input voltage changing between 10V to 30V
This is Active bass boost circuit with PCB layout using IC-741 or LF351 op-amp as low frequency filter circuit diagram ,Select frequency by change RC only.