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proddy
2020-01-09 20:02:13 +01:00
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10
docs/Building-your-own-test-circuit.md
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@@ -2,11 +2,11 @@ Here is a prototype board you can build yourself on a breadboard for testing.
The breadboard layout was done using [DIY Layout Creator](https://github.com/bancika/diy-layout-creator) and sources files are included in this repo.
![Breadboard Circuit](_media/schematics/breadboard.png)
![Breadboard Circuit](_media/schematics/breadboard.png ':size=500')
The schematic used:
![Schematic](_media/schematics/circuit.png)
![Schematic](_media/schematics/circuit.png ':size=500')
*Optionally I've also added 2 0.5A/72V polyfuses between the EMS and the two inductors L1 and L2 for extra protection.*
@@ -19,6 +19,6 @@ The EMS circuit will work with both 3.3V and 5V. It's easiest though to power di
- powering from the 3.5mm service jack (stereo jack) on the boiler. This will give you 8V so you need a buck converter (like a [Pololu D24C22F5](https://www.pololu.com/product/2858)) to step this down to 5V to provide enough power to the ESP8266 (250mA at least)
- powering direct from the EMS line, which is 15V DC and using a buck converter as described above.
| With Power Circuit |
| ------------------------------------------ |
| ![Power circuit](_media/schematics/Schematic_EMS-ESP.png) |
**With Power Circuit**
![Power circuit](_media/schematics/Schematic_EMS-ESP.png ':size=600') |