Designing a Digital Timer to Automate Geyser Control

Click For Summary

Discussion Overview

The discussion revolves around the design of a digital timer intended to automate the control of a geyser, focusing on the use of logic ICs rather than microcontrollers. Participants explore the feasibility of creating a custom solution with multiple preset on and off times, while considering legal and practical implications.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant expresses a desire to build a digital timer using logic ICs, specifying the need for at least three preset on and off times.
  • Another participant suggests purchasing a commercial AC wall timer as a simpler alternative, questioning the power requirements of a geyser.
  • A different participant points out legal restrictions in South Africa regarding homemade devices in distribution boards, mentioning the high power consumption of geysers.
  • There is a clarification that a geyser refers to a hot water heater, with a participant noting that there are timers capable of handling higher currents that could be installed in electrical panels.
  • The original poster reiterates that the goal is educational, emphasizing a desire to learn about logic ICs rather than using a pre-built solution.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the best approach to the problem, with differing opinions on the legality and practicality of homemade solutions versus commercial products.

Contextual Notes

There are unresolved questions regarding the legal implications of building a homemade timer for high-power devices and the specific requirements for the timer's design.

Fuzigish
Messages
5
Reaction score
0
I want to build a digital timer that will switch my geyser on and off at a preset time in order to save power. I don’t know much about PICs so I would rather try using only logic ICs. It has to have at least 3 preset ‘on-times’ and 3 ‘off-times’. Can anyone help me to get started?
 
Engineering news on Phys.org
seriously, just go to the hardware store and pick up an AC wall timer. something like this:
http://www.drillspot.com/pimages/65/6526_300.jpg

maybe get a "heavy duty" unit, while you're at it. don't know how much power a "geyser" uses.
 
Last edited by a moderator:
Unfortunately it would be illegal to build something like that into a distribution board in South-Africa. Plus an average geyser is 4000W – 6000W, so I don’t think even a heavy-duty unit would work.

This is an example of something similar: http://www.geyserwise.co.za/web/index.php"
 
Last edited by a moderator:
a "geyser" is a hot water heater?

there are also timers that control a lot more current and could be inserted into an electrical panel. what i don't get is how it's going to be any more legal for you to insert some homemade controller into a panel. if that's your goal, you'll need to buy an approved product.
 
Yes, a ‘geyser’ is a hot water heater.
This whole exercise is not to build something that will necessarily be used. I just want to learn something out of this about logic-ICs, so buying a pre-built unit would be pretty useless.
 

Similar threads

  • · Replies 5 ·
Replies
5
Views
959
  • · Replies 14 ·
Replies
14
Views
2K
  • · Replies 7 ·
Replies
7
Views
2K
  • · Replies 9 ·
Replies
9
Views
2K
  • · Replies 6 ·
Replies
6
Views
2K
  • · Replies 1 ·
Replies
1
Views
3K
Replies
4
Views
3K
  • · Replies 5 ·
Replies
5
Views
2K
  • · Replies 6 ·
Replies
6
Views
2K
  • · Replies 4 ·
Replies
4
Views
2K