ICL7107 Digital Kit DIY Module DC 5V 35mA 70.6x39mm DIY Kits Amp Current Meter

Descrtion:

100% and high quality Circuit Princle: AMM-TE is mainly composed of ICL7107, power circuit, reference voltage source, input circuit and display circuit. 1.ICL7107 is a BCD output integral type A/D conversion ch, its internal includes ;linear amplification,og switch, oscillation, display driving, etc,. 2.Power circuit is divided into positive power and negative power. Positive power is input by J2,C8 filtering. Negative is composed of R8, Q1, L1, C6, C7, D2, D3 and ZD1, which generate -5V voltage is input by ch 26th pin. 3.Reference voltage source is composed of R1, R2, VR1, R9, U2. 36-pin is reference voltage input pin. Adjust VR1 potentiometer to let 36-pin voltage be 100mV. 4.Input circuit is composed of J1, R5, R6 and C3. When the current of measured circuit paes through R5,it will generate a voltage on R5. This voltage will be input to ch 31-pin through R6 current limiting and be proceed, C3 is input voltage filtering . 5.Display circuit is composed of DS1-DS4, D1, D4, 4 digital tubes can be drived directly by the ch. R10 is current limiting resistance of DS1-DS3 digital tubes decimal points. Finished Product Debugging: 1.After connecting with DC 5V (please notice the polarity),the digital tube will display -.000 or .000,this is normal. cn1521689091ulta 2.Use to measure the voltage between ch 36-pin and 35-pin,and adjust VR1 potentiometer let it be 100mV. Key Points Voltage Reference Value: 1.Ch 1-pin and 21-pin: 5V. 2.Ch 36-pin and 21-pin: 100mV, 3.Ch 26-pin and 21-pin: -5V. Specification: Material: + Metal + Plastic Type: Digital Kit Panel Size:79 x 44mm / 3.11 x 1.73in Mount Size:71 x 39mm / 2.8 x 1.53in Quantity: 1 Pc Electricity Parameters: Working Voltage: DC 5V Working Current: 35 mA Accuracy: ±1mA Measuring Range: 0 - 2A Over Range Indication: Priy Display 1/-1 Display Color: Red Quantity: 1Set Note: Due to the difference between different monitors, the ture may not reflect the actual color of the item. Thank you! Paage includes: 1Set x Digital Kit

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