Schematics By The Book – Voltage Indicator

Schematics By The Book – Voltage Indicator


Schematics By The Book is a series highlighting educational and practice circuits from our favorite electronics books. Each post contains a link to the book, a copy of the schematic, and a full current BOM of through-hole parts you can use for prototyping.

Publication: Electronic Formulas, Symbols & Circuits
Author: Forrest Mims
Circuit: Voltage Indicator
Page: 117
Schematic File: Voltage Indicator KiCad Schematic
BOM CSV: voltage_indicator.csv

Forrest Mims Voltage Indicator

(Click schematic to enlarge)

Schematic Ref Description MFN MFP Part Link
D1 3.3V Zener Diode Fairchild Semiconductor 1N5226BTR Part Link
D2 5.1V Zener Diode Fairchild Semiconductor 1N5231BTR Part Link
D3 6.2V Zener Diode Fairchild Semiconductor 1N4735ATR Part Link
D4 9.1V Zener Diode Fairchild Semiconductor 1N5239BTR Part Link
D5 12V Zener Diode Fairchild Semiconductor 1N5242BTR Part Link
R1 100R Current Limiting Resistor Yageo Corporation CFR-12JB-52-100R Part Link
R2 330R Current Limiting Resistor Yageo Corporation CFR-25JB-52-330R Part Link
R3 470R Current Limiting Resistor Yageo Corporation CFR-25JB-52-470R Part Link
R4 680R Current Limiting Resistor Yageo Corporation CFR-25JB-52-680R Part Link
R5 1K Current Limiting Resistor Yageo Corporation MFR-25FBF52-1K Part Link
LED1, LED2, LED3, LED4, LED5 Voltage Level Indicator Cree C503B-RAN-CY0B0AA1 Part Link

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