Below is a schematic that may be of interest (it is the result of an investigation into the longest period of oscillation that you could reasonably get from a FET 555 timer and capacitors from DigiKey):
CIRCUIT DESCRIPTION
(1) The C555 is configured as a free running multivibrator with a period of around 14 minutes, which is the longest period I could manage with a reasonably priced timing capacitor, C1.
(2) The /RESET output comprises a 200uS negative going pulse every 14 minutes (but see note (7)).
(3) The Q output of the C555 is free to drive a suitable load.
NOTES
(1) The period of the negative output pulse is set by R5/C2.
(2) All capacitors are ceramic X7R dialectric of 10V minimum working voltage, +-10% or tighter.
(3) The frequency of the output pulse is set by R6/C1.
(4) R6 cannot be made any higher than 10M Ohm
(5) C1 must be a ceramic or film capacitor.
(6) IC6B, pin 6 must be a Schmitt input.
(7) The period can be extended by adding more 47uF ceramic capacitors in parallel with C1. Each added 47uF capacitor will add another 14 minutes to the period. Note that you can get reasonably priced 100uF and 220uF X7R ceramic cpacitors from ebay, rather than DigiKey.
(8) The timer must be a FET type, TLC555, LMC555- an ordinary 555 will probably not work.
DATASHEETS
(1)
https://www.ti.com/lit/ds/symlink/tlc555.pdf
(2)
https://www.ti.com/lit/ds/symlink/cd4093bc.pdf
SUPPLIERS
(1)
https://www.digikey.co.uk/product-d...rica/GRM32ER71A476ME15L/490-6543-1-ND/3845740
(2) **broken link removed**
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(3) **broken link removed**