---
title: "World’s Simplest Volt-Meter"
type: "article"
slug: "worlds-simplest-volt-meter-2"
url: "http://localhost/article/worlds-simplest-volt-meter-2/"
markdown_url: "http://localhost/article/worlds-simplest-volt-meter-2.md"
published_at: "2026-11-03T17:34:07+00:00"
modified_at: "2026-11-03T17:34:07+00:00"
featured_image:
  url: "http://localhost/wp-content/uploads/2022/04/20230809-041332.jpg"
excerpt: "World's Simplest Volt-Meter circuit (#967 lamp, red and green LEDs, probe and clip) THIS LITTLE CIRCUIT DETECTS ANY VOLTAGE FROM 2 TO 125 VOLTS, A.C. OR D.C. RED LED - DC, Probe positiveGRN LED - DC, Probe negativeBOTH LEDs - Alternating 967 lamp indicates higher voltages, starting about 15 volts, A.C. or D.C. INPUT: 2-125…"
post_tag:
  - name: "Hardware project"
    slug: "hardware-project"
    taxonomy: "post_tag"
    url: "http://localhost/tag/hardware-project/"
indiv:
  - name: "Fred Nachbaur"
    slug: "fred-nachbaur"
    taxonomy: "indiv"
    url: "http://localhost/indiv/fred-nachbaur/"
  - name: "G. Fleming"
    slug: "g-fleming"
    taxonomy: "indiv"
    url: "http://localhost/indiv/g-fleming/"
publication: "Time Designs Magazine"
publication_r:
  id: 10277
  title: "Time Designs Magazine"
  type: "periodical"
  url: "http://localhost/periodical/time-designs-magazine/"
authors: "G. Fleming; F. Nachbaur"
volume: "4"
issue: "5"
issues_articles:
  - id: 26788
    title: "Time Designs Magazine v4 n5"
    type: "issue"
    url: "http://localhost/issue/time-designs-magazine-v4-n5/"
pages: "31"
pubdate: "July/August 1988"
archive_link: false
volumeissue: "v4n5"
---

# World’s Simplest Volt-Meter

[![World's Simplest Volt-Meter circuit (#967 lamp, red and green LEDs, probe and clip)](http://localhost/wp-content/uploads/2026/11/timedesigns-new-worlds-simplest-volt-meter-1-1024x786.png)](http://localhost/wp-content/uploads/2026/11/timedesigns-new-worlds-simplest-volt-meter-1.png)World's Simplest Volt-Meter circuit (#967 lamp, red and green LEDs, probe and clip)

THIS LITTLE CIRCUIT DETECTS ANY VOLTAGE FROM 2 TO 125 VOLTS, A.C. OR D.C.

RED LED – DC, Probe positive  
GRN LED – DC, Probe negative  
BOTH LEDs – Alternating

967 lamp indicates higher voltages, starting about 15 volts, A.C. or D.C.

INPUT: 2-125 V. AC or DC

967 lamp may be ordered through any electronic supply house or catalog

Build into pen or small plastic vial.

BE CAREFUL With ELECTRICITY

by G.Fleming  
LVR H.S.  
NELSON, B.C.  
drawn by: F.Nachbaur