The 555 CMOS Timer is the central piece of the Hulda Clark Zapper. The 555 has a small round cookie bite at the top. If you look at the photo above you can see the small dot near the top left corner of the 555. The little dot is next to Pin 1, and it designates the top of the timer. When one is using a 555 CMOS Timer in a circuit, one must first establish the top of the timer so that it is built into the circuit correctly.

Please note that when ordering electronic parts and kits we can assume no liability on the customers ability to use them. Safety, craftsmanship, experience, and ability are the user’s responsibility.

Electronic parts are small and fragile. We can not offer refunds or replacements on electronic parts. Buy electronic parts and kits only if you believe you can accomplish the work. If you experience difficulty with your build, or have little experience in electronics, please order extra parts.

The 555 CMOS Timer is vulnerable to static electricity. If you walk on a carpeted floor and the 555 receives a static shock it may burn out and need replacement. Save time and shipping by ordering extras.