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@@ -60,6 +60,10 @@ A safe option is to power Penny with 4 NiMH 1.2V rechargeable batteries, but I tried to run Penny with 4 standard alcaline batteries (6.4V in total) and it did not fry the brain. If you are going this way, I did warn you. It is at your own risk!** +Here is a photo of the motherboard fully populated (with an exception of IR led/phototransistors): + +![](https://raw.githubusercontent.com/ssloy/penny/master/doc/penny_motherboard.jpg) + ### The proximity sensor Penny has two eyes, each one is composed of an infrared LED and a corresponding phototransistor. The LED emits infrared light; this light propagates through the air and once it hits an object it is reflected back towards the phototransistor. diff --git a/doc/penny_motherboard.jpg b/doc/penny_motherboard.jpg Binary files differnew file mode 100644 index 0000000..8a0b9aa --- /dev/null +++ b/doc/penny_motherboard.jpg |