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Results tagged with circuit-design
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user 331625
The process of creating a circuit to accomplish a particular task. When designing a circuit, one should consider how it should work, the target specifications, efficiency, cost effectiveness, code compliance, and ethics.
0
votes
1
answer
52
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Modify or adapt a device using low-voltage AC to accept DC
A few years ago, a family member asked me to look at a set of bookshelf speakers that stopped working. Inside I noticed obvious signs of a cooked component on the internal power supply, which was a se …
- 256
4
votes
5
answers
3k
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Do all relays need a diode in parallel with the coil?
I often see circuits with relays and diodes like this:
Note the diode D1 in parallel with RLY1, at reverse polarity to the driving voltage V1. Per my research, the reason is that the relay coil is ba …
- 256
2
votes
How to implement battery back-up?
It sounds to me like you want one of those "battery charging boost modules" available on eBay for around a dollar. They hook up to a power source, li-ion battery, and load. They charge the battery whi …
- 256