Summary of NETWORK EQUIPMENT RESETTER using PIC16F628
This project is a network power resetter using a PIC16F628 microcontroller to control a solid-state relay that interrupts 110VAC power to satellite receivers and routers. It automatically cuts power for 10 seconds every 24 hours (first reset occurs eight hours after power-up). An LED flashes once per second. A pushbutton allows immediate reset (hold 2 seconds) or setting the initial delay in hours by a long-press calibration sequence. The design can be replicated with a mechanical timer but offers electronic control and configurability.
Parts used in the Network Equipment Resetter:
- PIC16F628 microcontroller
- 6 MHz crystal oscillator
- Solid-state relay (SSR)
- LED
- Pushbutton switch (SW)
- Resistors and capacitors for PIC and LED circuits
- Power supply providing +5 VDC
- Programming header pins (PROG_CLK, PROG_DAT, MCLR)
- PCB or perfboard and connectors for 110VAC wiring
Introduction
This program is a network power resetter. It controls a solid-state-relay that is in series with 110VAC that supplies power to a satellite internet receiver, various routers, etc. Once every 24 hours it drops power for 10 seconds to allow the receiver and routers to start clean, something that seems to be necessary to keep receivers and routers from “losing themselves” after running too long!
Features
This is simply an electronic solution with a couple of features, but the same thing can be accomplished by the use of a mechanical “home” timer that drops power once per day, as illustrated in the image below.
Operation
- Power is dropped automatically for 10 seconds once every 24 hours, starting eight hours after the unit is powered up.
Code:
/****************************************************************************
NETWORK_RESET_01.C
This program is a network reseter. It controls a solid-state-relay that
is in series with 110VAC. It supplies power to a satellite receiver,
various routers, etc. Once every 24 hours it drops power for 10 seconds
to allow the receiver and routers to start clean.
The LED flashes once per second.
The 24 hour reset occurs eight hours from the time the unit is powered on.
If it is desired to changed that delay, decide how many hours (from now)
that you want the unit to reset. Press and hold the button for
greater than five seconds, and release it. The LED will stop flashing.
Immediately press and hold the button until the LED starts flashing. Count
the flashes as you hold the button. Release the button when the LED has
flashed the number of hours you want to delay. Normal operation will
occur after three seconds.
To drop power immediately, press and hold the button for two seconds.
+5
|
14
----------
SW ----6-| |-17-- LED
| |-18-- SSR
| |
| |
| 16F628 |
| |
| |-13--PROG_CLK
| |-12--PROG_DAT
6MHz XTAL-15-| |-4---MCLR
XTAL-16-| | GND
----------
5
|
Gnd
***************************************************************************/
For more detail: NETWORK EQUIPMENT RESETTER using PIC16F628
- What does the network resetter do?
It controls an SSR to drop 110VAC power to receivers and routers for 10 seconds once every 24 hours. - When does the first 24 hour reset occur?
The first reset occurs eight hours after the unit is powered up. - How long does the power stay off during a reset?
Power is dropped for 10 seconds during each reset. - How can I trigger an immediate reset?
Press and hold the button for two seconds to drop power immediately. - How do I change the initial delay before the daily reset?
Press and hold the button for more than five seconds, release, then press and hold again while counting LED flashes; release when it has flashed the number of hours desired. - What indicates normal operation?
The LED flashes once per second during normal operation. - Can a mechanical timer achieve the same result?
Yes, the article notes a mechanical home timer can accomplish the same once-per-day power drop. - Which microcontroller is used in the project?
The project uses a PIC16F628 microcontroller.
