When the Busi555Rake failed, a lot was learned. It may still be possible to make a single-sided business card with an integrated battery holder but double-sided boards offer the benefit of adding details to the back instead of leaving them bare.
The old rake design was entirely eliminated and a 3-finger design was created. The 3-finger design relied on a solder pad on the underside to contact the positive battery terminal while the top-facing solder pads would contact the negative battery terminal.
Copies were ordered along with inexpensive batteries. Parts were ordered from a nearby distributor. Solder paste was purchased locally. All the components were soldered with a solder relfow station since a hot-plate might scorch the silkscreen on the bottom of the board.
A battery was added to the card and without any special alignment or tricks, the circuit began working flawlessly.
Project page on EasyEDA
First time here?
Completed projects from year 1
Completed projects from year 2
Completed projects from year 3
Disclaimer for http://24hourengineer.blogspot.com/ and 24hourengineer.com
This disclaimer must be intact and whole. This disclaimer must be included if a project is distributed.
All information in this blog, or linked by this blog, is not to be taken as advice or solicitation. Anyone attempting to replicate, in whole or in part, is responsible for the outcome and procedure. Any loss of functionality, money, property or similar, is the responsibility of those involved in the replication.
All digital communication regarding the email address 24hourengineer@gmail.com becomes the intellectual property of Brian McEvoy. Any information contained within these messages may be distributed or retained at the discretion of Brian McEvoy. Any email sent to this address, or any email account owned by Brian McEvoy, cannot be used to claim property or assets.
Comments to the blog may be utilized or erased at the discretion of the owner. No one posting may claim property or assets based on a post.
This blog, including pictures and text, is copyright to Brian McEvoy.
2017-09-12 (Tu)
The old rake design was entirely eliminated and a 3-finger design was created. The 3-finger design relied on a solder pad on the underside to contact the positive battery terminal while the top-facing solder pads would contact the negative battery terminal.
Layout of card
Copies were ordered along with inexpensive batteries. Parts were ordered from a nearby distributor. Solder paste was purchased locally. All the components were soldered with a solder relfow station since a hot-plate might scorch the silkscreen on the bottom of the board.
Front of card with components
The squiggle pattern was nothing more than output from a filter in GIMP but the design was subtle enough and it left an interesting texture not usually found on business cards. The raised bumps of the paint felt like raised lettering found on expensive prints.
Back of card, pattern
A battery was added to the card and without any special alignment or tricks, the circuit began working flawlessly.
Functioning business card
Project page on EasyEDA
First time here?
Completed projects from year 1
Completed projects from year 2
Completed projects from year 3
Disclaimer for http://24hourengineer.blogspot.com/ and 24hourengineer.com
This disclaimer must be intact and whole. This disclaimer must be included if a project is distributed.
All information in this blog, or linked by this blog, is not to be taken as advice or solicitation. Anyone attempting to replicate, in whole or in part, is responsible for the outcome and procedure. Any loss of functionality, money, property or similar, is the responsibility of those involved in the replication.
All digital communication regarding the email address 24hourengineer@gmail.com becomes the intellectual property of Brian McEvoy. Any information contained within these messages may be distributed or retained at the discretion of Brian McEvoy. Any email sent to this address, or any email account owned by Brian McEvoy, cannot be used to claim property or assets.
Comments to the blog may be utilized or erased at the discretion of the owner. No one posting may claim property or assets based on a post.
This blog, including pictures and text, is copyright to Brian McEvoy.
2017-09-12 (Tu)
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