---
title: "Two Problem-Solving Circuits: Preregulator and Battery Backup"
type: "article"
slug: "two-problem-solving-circuits-preregulator-and-battery-backup"
url: "http://localhost/article/two-problem-solving-circuits-preregulator-and-battery-backup/"
markdown_url: "http://localhost/article/two-problem-solving-circuits-preregulator-and-battery-backup.md"
published_at: "2020-10-27T17:11:13+00:00"
modified_at: "2024-06-23T01:09:25+00:00"
featured_image:
  url: "http://localhost/wp-content/uploads/2022/04/20230809-041332.jpg"
excerpt: "Add a voltage regulator to your Sinclair power supply; build a batter backup unit."
category:
  - name: "Syntax"
    slug: "syntax"
    taxonomy: "category"
    url: "http://localhost/category/periodicals/syntax/"
post_tag:
  - name: "1982"
    slug: "year-1982"
    taxonomy: "post_tag"
    url: "http://localhost/tag/year-1982/"
  - name: "Hardware project"
    slug: "hardware-project"
    taxonomy: "post_tag"
    url: "http://localhost/tag/hardware-project/"
  - name: "ZX80"
    slug: "zx80"
    taxonomy: "post_tag"
    url: "http://localhost/tag/zx80/"
  - name: "ZX81"
    slug: "zx81"
    taxonomy: "post_tag"
    url: "http://localhost/tag/zx81/"
model:
  - name: "Sinclair ZX80"
    slug: "zx80"
    taxonomy: "model"
    url: "http://localhost/model/zx80/"
  - name: "Sinclair ZX81"
    slug: "zx81"
    taxonomy: "model"
    url: "http://localhost/model/zx81/"
indiv:
  - name: "Fred Nachbaur"
    slug: "fred-nachbaur"
    taxonomy: "indiv"
    url: "http://localhost/indiv/fred-nachbaur/"
publication: "Syntax"
publication_r:
  id: 10246
  title: "Syntax"
  type: "periodical"
  url: "http://localhost/periodical/syntax/"
authors: "Fred Nachbaur"
volume: "3"
issue: "8"
issues_articles:
  - id: 26706
    title: "Syntax/Syntax ZX80 v3 n8"
    type: "issue"
    url: "http://localhost/issue/syntax-syntax-zx80-v3-n8/"
pages: "4-5"
pubdate: "August 1982"
archive_link: false
volumeissue: "v3n8"
---

# Two Problem-Solving Circuits: Preregulator and Battery Backup

Add a voltage regulator to your Sinclair power supply; build a batter backup unit.