The production kit of the logic test pen is mainly used to introduce a logic pen that uses a CD4511BE to control the display of a digital tube. The CD4511BE includes two independent, high-gain, internal frequency compensation dual operations. Amplifier, suitable for single power supply with a wide range of power supply voltage, and also suitable for dual power supply mode. Under the recommended working conditions, the power supply current has nothing to do with the power supply voltage.
Its scope of application includes sensor amplifiers, DC gain modules, audio amplifiers, industrial controls, DC gain components and all other occasions where operational amplifiers can be powered by a single power supply.

Color circle recognition method:
Black 0, Brown 1, Red 2, Orange 3, Yellow 5, Green 6, Blue 6, Violet 7, Gray 8, White 9, Gold, Silver
Five-color ring resistance refers to the resistance represented by five color rings, counting from left to right,
as the picture shows. The first color circle represents the largest digit of the resistance value; the second color circle
Represents the second digit of the resistance value; the third color circle represents the third digit of the resistance value;
The fourth color ring represents the multiplier of the resistance value; the fifth color ring represents the error range.
For example, a five-color ring resistor, the first ring is red (representing 2), and the second ring is red
(Representing 2), the third ring is black (representing 0), the fourth ring is black (representing 1 times),
The fifth ring is brown (representing ±1%), and its resistance value is 220Ω×1=220Ω,
The error range is ±1%.