Description This is an adaptation of the PSU that uses a 7805 and can supply higher current. You need to use an appropriate heatsink for the 2N3055 transistor, you could…
Author
iainhendry
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Description As you may recall the LM317 regulator is adjustable from 1.25 to about 35v. By adding 2 diodes you can drop the voltage slightly, about 0.6v of a voltage…
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Description This is a basic 9v to 5v PSU using a 7805 regulator, this was a common circuit to build for building a low cost 5v stabilised DC supply using…
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Description A simple book light Schematic Bill of materials QTY PART-REFS VALUE CODE — ——— —– —- Resistors ——— 1 R1 150K 1 R2 120R 2 R3,R4 100K Capacitors ———-…
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This is the most basic example of using a LM317 voltage regulator. The variable resistor (R1) and R2 are used to select the output voltage. The Lm317 is capable of…
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Description A simple LED flasher using a 555 timer Schematic Bill of materials Resistors ——— 2 R1,R3 1k 1 R2 470k Capacitors ———- 1 C1 1uf Integrated Circuits ——————- 1…