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- Feb 16, 2010
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- 3,668
Someone asked me to build an etcher for them, so here is the latest version.
1. I replaced the older xenon power indicator with a much cheaper LED. It will double as a reading light if you need it to.
2. The 12VAC transformer is 1500ma instead of the 366ma before, as well as a more stable 13.4v instead of 16v. The supplier from Hong Kong is gone, and I had to buy a more expensive $12 transformer. The voltage is the same, just a little more current running through so it should darken better.
3. 12VDC is the same 1000ma.
4. I added a momentary push button to the circuit. Instead of etching for 5-10 seconds, you push the button 20-30 times and it gives a much nicer, cleaner etch.
5. Removed the power switch. Kind of unnecessary since the middle position of the switch is off, as well as without the button pressed the circuit is broken.
6. Total parts cost of this latest version is $27. A little about the $20 goal, just have to find cheap 12vac supplies.
Here's a link to the original thread.
http://www.bladeforums.com/forums/showthread.php/805772-DIY-Electro-etcher-under-20
1. I replaced the older xenon power indicator with a much cheaper LED. It will double as a reading light if you need it to.
2. The 12VAC transformer is 1500ma instead of the 366ma before, as well as a more stable 13.4v instead of 16v. The supplier from Hong Kong is gone, and I had to buy a more expensive $12 transformer. The voltage is the same, just a little more current running through so it should darken better.
3. 12VDC is the same 1000ma.
4. I added a momentary push button to the circuit. Instead of etching for 5-10 seconds, you push the button 20-30 times and it gives a much nicer, cleaner etch.
5. Removed the power switch. Kind of unnecessary since the middle position of the switch is off, as well as without the button pressed the circuit is broken.
6. Total parts cost of this latest version is $27. A little about the $20 goal, just have to find cheap 12vac supplies.
Here's a link to the original thread.
http://www.bladeforums.com/forums/showthread.php/805772-DIY-Electro-etcher-under-20
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