Item details
DIY Keypad DTMF Tone Generator
Assembled and tested with Keypad
- included: Jumper wires, Schematics.
- This kit include the 4x4 Keypad.
- Kit output is CMOS logic , please don't forget to include ground wire when interfacing to other circuits .
- Include 10nF coupling capacitor when interfacing to cell phones , and use coupling transformer or/and Zener diodes when hooking up to regular home phone ( land line ) .
- Here is is the link for the DTMF datasheet :
- This kit include the 4x4 Keypad.
- Kit output is CMOS logic , please don't forget to include ground wire when interfacing to other circuits .
- Include 10nF coupling capacitor when interfacing to cell phones , and use coupling transformer or/and Zener diodes when hooking up to regular home phone ( land line ) .
- Here is is the link for the DTMF datasheet :
Quantity - 1 KIT
Product
Description:
Additional Data
- Click on the datasheet button below for full technical specifications:
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Shipping Policy
Dear Customer,
-When you want to buy other listings and save on shipping you must remember to pay for them only after
you are done buying all the listings, I recommend using " Add to cart " instead of the "Buy it now"
-will assemble a discounted invoice and save you the shipping cost.
In case that it does not happen don't pay yet, just use "contact seller" and say "please send me an invoice,"
I will calculate the discount for you, then will send you a new PayPal invoice.
-I rely to calculate totals automatically so, always contact me to get refund if we overcharge
on shipping more then $3.35+(number of additional items)x$0.10.
-We are interested seeing you again , so when package arrives let me know if you are not 100% happy
with the purchase , I can surely help to resolve any issues , by offering great solutions ,
exchange or refund , I will try to answer any questions within 5 hours or less
Hope to see you again
,Sincerely Sean
-When you want to buy other listings and save on shipping you must remember to pay for them only after
you are done buying all the listings, I recommend using " Add to cart " instead of the "Buy it now"
-will assemble a discounted invoice and save you the shipping cost.
In case that it does not happen don't pay yet, just use "contact seller" and say "please send me an invoice,"
I will calculate the discount for you, then will send you a new PayPal invoice.
-I rely to calculate totals automatically so, always contact me to get refund if we overcharge
on shipping more then $3.35+(number of additional items)x$0.10.
-We are interested seeing you again , so when package arrives let me know if you are not 100% happy
with the purchase , I can surely help to resolve any issues , by offering great solutions ,
exchange or refund , I will try to answer any questions within 5 hours or less
Hope to see you again
,Sincerely Sean
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