Home

SimpleCircuitBoards.com

info@SimpleCircuitBoards.com

SECURE Online Purchasing now available!!!

Updated 03/10/2009

Timer-Based Boards

Back to Products  Home

 

 

These circuit boards are based on the 555 and 556 Timer chips.  Times are controlled with “timing resistors” which are easily replaceable by the user.  Time intervals can range from less than a second to about 50 minutes.  See Info Sheets for a table of resistor values and associated time delays.   Boards will come with short-interval timing resistors installed for demonstration purposes.  User will supply timer resistors appropriate for their application - available at any electronics supply store (i.e., Radio Shack).  All boards are powered by 12VDC.  Other voltages are available on request.
 


 

Time Delay Relay Board: $13.00

 

Here is a board that, when triggered, will activate a relay for a specified period of time.  This time is controlled by a “timing resistor” which is easily replaceable by the user.  The trigger can be a switch closure (supplied by User) or if you remove the “pullup resistor” (see diagram on Info Sheet), the board can be triggered by touching your finger to wires coming from the trigger terminals.

 

Info Sheet


 

Interval Timer Relay Board: $15.00

 

Here is a board that, when power is applied, will cycle on and off a relay.  The relay on time and off time can be independently controlled.  The relay will continue cycling on and off until the power to the board is turned off.

 

 

Info Sheet


 

Cascading Timer Relay Board: $20.75

 

Here is a board with two 10A relays that, when triggered, will activate one relay for a specified time and then activate another relay for a specified time.  Each relay’s ON time can be independently controlled.  Once the second relay’s time has expired both relays will remain off until the board is triggered again.


 

Info Sheet


 

Multi-Event Timer Relay Board: $39.00

 

Here is a board that I developed for someone who set up haunted houses.  This person wanted a board that would control 3 separate events – a “Bang Event” that happened as soon as someone triggered the board, a “Show #1” that occurred for a specified period of time and a “Show #2” that occurred for a specified period of time that started after Show #1 finished.  He also wanted the board to isolate itself from the triggering event so that it could not be re-triggered until after the last event had completed. 


 

Info Sheet

SimpleCircuitBoards.com 2004 - 2009